Triethylene Glycol - The Dow Chemical Company

Triethylene Glycol

Table of
Contents
Introduction 1
Quality, Service, and Product Information . . . . . . . . . . . . . . . . . . . . . 1
Table 1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Product Stewardship Guidelines and Principles . . . . . . . . . . . . . . . . . . 3
Non-supported applications of Dow-manufactured EG, DEG,TEG,TETRA,
and By-Products of Glycol Manufacturing . . . . . . . . . . . . . . . . . . . . 3
Properties 5
Table 2 Physical Properties of Triethylene Glycol . . . . . . . . . . . . . . . 5
Table 3 Solubilities of Various Materials in Triethylene Glycol . . . . . . . . 6
Table 4 Triethylene Glycol Compatibility with Elastomeric Materials . . . . . 7
Table 5 Constant Boiling Mixtures of Triethylene Glycol . . . . . . . . . . . 8
Figure 1 Freezing Points of Aqueous Triethylene Glycol Solutions . . . . . . . 9
Figure 2 Boiling Points vs . Composition of Aqueous Triethylene
Glycol Solutions at Various Pressures . . . . . . . . . . . . . . . . 10
Figure 3 Condensation Temperatures vs . Composition of Aqueous
Triethylene Glycol Solutions at Various Pressures . . . . . . . . . . 11
Figure 4 Vapor Pressures of Triethylene Glycol at Various Temperatures . . 12
Figure 5 Vapor Pressures of Aqueous Triethylene Glycol Solutions at
Various Temperatures . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 6 Specific Gravities of Aqueous Triethylene Glycol Solutions . . . . . 14
Figure 7 Viscosities of Aqueous Triethylene Glycol Solutions . . . . . . . . . 15
Figure 8 Specific Heats of Aqueous Triethylene Glycol Solutions . . . . . . . 16
Figure 9 Thermal Conductivities of Aqueous Triethylene
Glycol Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 10 Dew Points of Aqueous Triethylene Glycol Solutions at
Various Contact Temperatures . . . . . . . . . . . . . . . . . . . 18
Figure 11 Comparative Hygroscopicities of Various Glycols
at 70°F (21°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 12 Refractive Indices of Pure Triethylene Glycol . . . . . . . . . . . . 20
i

Table of
Contents
Figure 13 Refractive Indices of Aqueous Triethylene Glycol Solutions
at 77°F (25°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 14 Surface Tensions of Pure Triethylene Glycol . . . . . . . . . . . . . 22
Figure 15 Surface Tensions of Aqueous Triethylene Glycol Solutions
at 77°F (25°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 16 Electrical Conductivities of Aqueous Triethylene
Glycol Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Health and Environmental Information 25
Health Effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Environmental Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Biodegradation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Storage and Handling 26
Shipping Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Product Safety 27
Emergency Service 28
Sales Office 29
ii

Introduction
Precautions:
Carefully review our current Material Safety
Data Sheet
Dow: Your Best Source
for Triethylene Glycol Quality
Dow is the world’s largest producer of
ethylene oxide and glycols, with over 70
years of experience in their manufacture,
marketing, and research and development .
The uniform implementation of statistical
process control at all of our plants enables
us to consistently deliver the high-quality
product you require . Our total approach to
Quality and Quality Systems is continuously
improved to ensure that our facilities meet
the requirements for registration to the
stringent ISO 9000 series of standards .
Optimum performance demands a quality
product, and that is what we deliver . Our
vast distribution system of plants, terminals,
tankers, barges, tank cars, and trucks helps
to ensure your delivery of triethylene glycol
when and where you need it .
Service
For solutions to problems or answers to
questions, Dow offers extensive technical
service and support, available through trained
sales representatives as well as our skilled
staff from the Research and Development
Department . Your order of triethylene glycol
will be processed expertly and quickly when
you place a call to one of our many helpful
customer service representatives . (See page 29 .)
1
Product Information
Formula C 6 H 14 O 4
Molecular Formula HOCH 2 CH 2 OCH 2 CH 2 OCH 2 CH 2 OH
CAS Number 112-27-6
Synonyms Glycol-bis(hydroxyethyl) ether
2,2’-[1,2-ethanediylbis(oxy)] bis-ethanol
Triglycol
TEG
T3EG
TriEG
Triethylene glycol is a transparent, colorless,
low-volatility, moderate-viscosity, watersoluble
liquid . Under normal conditions,
there is no detectable odor; under high vapor
concentrations, a slightly sweet odor may be
detected . It is completely miscible with water
and many organic liquids . Triethylene glycol
has properties similar to other glycols and
may be used preferentially in applications
requiring a higher boiling point, higher
molecular weight, or lower volatility than
diethylene glycol .
The hydroxyl groups on triethylene glycol
undergo the usual alcohol chemistry giving
a wide variety of possible derivatives .
Hydroxyls can be converted to aldehydes,
alkyl halides, amines, azides, carboxylic
acids, ethers, mercaptans, nitrate esters,
nitriles, nitrite esters, organic esters, peroxides,
phosphate esters and sulfate esters .
Triethylene glycol may be used directly as a
plasticizer or modified by esterification . The
solubility properties of triethylene glycol are
important for many applications . End-uses
for triethylene glycol are numerous . (See
Table 1 .)
Introduction

Introduction
Table 1
Applications
Hygroscopicity • Dehydration of natural gas
Plasticizer • Safety glass
Low Volatility • Gas dehydration
• Moisturizing and plasticizing cork, adhesives
• Separation membranes (silicone rubber,
polyvinyl acetate, cellulose triacetate)
• Ceramic materials (resistant refractory
plastics, molded ceramics)
Solvent • Resin impregnants and other additives
• Steam-set printing inks
• Aromatic and paraffinic hydrocarbons separations
• Cleaning compounds
• Polyethylene terephthalate production equipment
cleaning
• Cyanoacrylate and polyacrylonitrile
Chemical Intermediate • Unsaturated polyester resin
• Various resins of the alkyd type used
as laminating agents in adhesives
• Esterification products used in plasticizer
intermediates for nitrocellulose lacquers
and vinyl resins
• Polyester polyols for polyurethanes
• Thermoplastic polyurethanes
• Silcone compounds
• Emulsifiers
• Lubricants
Freezing Point Depression • Heat transfer fluids
2
Introduction

Introduction
Product Stewardship
Guidelines and Principles of
The Dow Chemical Company
The following bullet points identify some
applications that are NOT supported by
Dow for EG Products on a go-forward basis .
The reasons for these limitations include
areas in which we have decided not to
pursue for general business reasons and
actions that would minimize unnecessary
risk and liabilities to the business . In addition,
the following list of uses not supported by
Dow does not imply a Dow warranty or Dow
support of uses in applications not covered
by this list . This list is not all-inclusive .
Non-supported applications of Dow-
manufactured EG, DEG,TEG,TETRA, and
By-Products of Glycol Manufacturing
(Dow EG Products):
• The use of Dow EG Products in the
production of tobacco and in the manufacture
of tobacco products (including
but not limited to additives, humectants,
filters, inks, and paper) is not supported
by Dow .
• The use of Dow EG Products for the
generation of artificial smoke/theatrical
fogs/mist is not supported by Dow .
• The use of Dow EG Products as an
ingredient in fuel for warming foods
(Sterno TM -like application) or in fuel for
heating an enclosed space where human
exposure is possible is not supported
by Dow .
3
• The use of Dow EG Products in fire
extinguishing sprinkler systems is not
supported by Dow .
• The use of Dow EG Products in the
manufacture of munitions is not supported
by Dow .
• The use of Dow EG Products in the
production of deicers for use on roadways
and pedestrian walkways is not supported
by Dow .
• The use of Dow EG Products as a component
of heat transfer fluids in systems where the
heat transfer fluid could infiltrate (e .g ., via
an exchanger leak, backflow prevention
failure, or other means) a potable water
system is not supported by Dow .
• The use of Dow EG Products purposely as
a non-reacted component in a formulation
for direct internal or external human/
animal contact, including but not limited
to ingestion, inhalation, and skin contact,
and in medical/veterinary devices and
medical/veterinary applications is not
supported by Dow . (Examples of some such
applications are uses as a direct component
in foods, beverages, pharmaceuticals, cosme-
tics, or personal care products .)
• The use of Dow EG Products for consumer
or hospital deodorizing or air “purifying”
purposes by spraying as an aerosol is not
supported by Dow .
• The use of Dow EG Products as a
non-reacted component in adhesives,
packaging that has direct contact with
food or beverages is not supported by Dow .
Introduction

Introduction
• The use of Dow EG Products as a nonreacted
component in the formulation
of glues, pastes, or items where the
potential for sufficient human contact
and/or ingestions exists (including but
not limited to children’s school glues/
paste or art/craft glue/paste) is not
supported by Dow .
To enter into new applications beyond
the traditional standard industrial use
applications, contact your Dow representative
to review the specific application . Dow has
a risk assessment process whereby the
application will be reviewed and a determination
will be made as to whether the
application meets Dow’s requirements and
can therefore be supported by Dow . Because
use conditions and applicable laws may
differ from one location to another and
may change with time, when an application
is supported by Dow, Dow does not warrant
and is not responsible for the use in such
application .
4
NO WARRANTIES ARE GIVEN;
ALL IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE ARE
EXPRESSLY EXCLUDED .
Further, any violation of or failure to
comply with the information contained in
Dow’s Material Safety Data Sheet, Product
Label, Product Information Guide, product
literature or other product safety information
is a misuse of Dow’s EG and Higher Glycol
Products . These documents can be obtained
by contacting your Dow representative or
Dow’s Customer Information Group
(800) 447-4369 . We can never specify all
circumstances where misuse might occur,
so if at any time a customer or downstream
use appears to be improper or unsafe, please
contact our Product Steward at (225) 353-6122 .
Introduction

Properties
Table 2
Physical Properties of Triethylene Glycol
Determined on purified samples of Triethylene Glycol
Property Scientific Units Common Units
Autoignition Temperature 349°C 660°F
Boiling Point at 760 mm Hg 288 0°C 550 4°F
∆ Boiling Point/∆ Pressure (750–770 mm Hg) 0 0073°C/kPa 0 055°C/mm Hg
Critical Pressure 3,313 3 kPa 24,852 mm Hg
Critical Specific Volume 0 443 L/gmol 7 10 ft 3 /lbmol
Critical Temperature 440°C 824°F
Dielectric Constant 23 69 23 69
Electrical Conductivity 0 20 x 10 -6 mhos/cm 0 002 micromhos/cm
Evaporation Rate (Butyl Acetate = 1)

Properties
Table 3
Solubilities of Various Materials in Triethylene Glycol
Solubility, g/100 mL of Triethylene Glycol at 25°C
Material Solubility
Acetone Completely Soluble
Animal Glue (Dry) Slightly Soluble
Benzene Completely Soluble
Carbon Tetrachloride 40 6
Castor Oil 0 3
Cellulose Acetate Completely Soluble
Chlorobenzene Completely Soluble
Coconut Oil Insoluble
Cottonseed Oil Insoluble
Dextrin Completely Soluble
Dextrin (10% in water) Insoluble
Dibutyl Phthalate 19 8
Dichloroethyl Ether Completely Soluble
Diethanolamine Completely Soluble
Ethyl Ether 20 4
Ethylene Glycol Stearate Slightly Soluble
Gum Damar Slightly Soluble
Heptane Slightly Soluble
Hydrous Wool Fat Slightly Soluble
Kauri Gum Slightly Soluble
Lard Oil Insoluble
Linseed Oil Insoluble
Methanol Completely Soluble
Monoethanolamine Completely Soluble
Nitrocellulose Completely Soluble
o-Dichlorobenzene Completely Soluble
Olive Oil Insoluble
6
Material Solubility
Paraffin Oil Insoluble
Phenol Completely Soluble
Pine Oil Completely Soluble
Rosin 5 0
Shellac Slightly Soluble
Soy Bean Oil Insoluble
Sperm Oil Insoluble
Tall Oil 10 1
Tetrachloroethylene 17 7
Toluene 33 0
Tung Oil Insoluble
Turkey Red Oil 12 3
Urea 31 0
Properties

Properties
Table 4
Triethylene Glycol Compatibility with Elastomeric Materials
Material
25˚C (77˚F) 80˚C (176˚F) 160˚C (320˚F)
Adiprene L-100 Good Poor Poor
Black Rubber 3773 Good Poor Poor
Buna N (or 25) Good Good
Buna S Good Fair Poor
Butyl Rubber Good Good
Compressed Asbestos Good Good Fair
EPDM Good Good Good
EPR Rubber Good Good Good
Hycar D-24 Good Fair
Hypalon Good Poor Poor
Kalrez Good Good Good
Natural Rubber Gum Good Poor Poor
Neoprene 7797 Good Fair
Red Rubber Number 107 Good Poor Poor
Saraloy 300 Good Poor Poor
Silicone No 65 Good Good
Thiokol 3060 Good Poor Poor
Viton A Good Good Poor
7
Temperature
Properties

Properties
Table 5
Constant Boiling Mixtures of Triethylene Glycol
Triethylene Glycol
Acenaphthene
Triethylene Glycol (5 mm Hg)
Benzyl Ether
Triethylene Glycol
Benzyl Phenyl Ether
Triethylene Glycol
Biphenyl
Triethylene Glycol (3 mm Hg)
Diethylene Glycol
Triethylene Glycol
Diphenylmethane
Triethylene Glycol
1,2-Diphenylmethane
Triethylene Glycol
Ethyl Phthalate
Triethylene Glycol
Isoamyl Benzoate
Triethylene Glycol
Isoamyl Oxalate
Triethylene Glycol
Isoamyl Salicylate
Triethylene Glycol
Methyl Phthalate
Triethylene Glycol
Phenyl Benzoate
Triethylene Glycol
Phenyl Ether
Triethylene Glycol (4 mm Hg)
Phenyl Ether
Triethylene Glycol
Water
Triethylene Glycol (10 mm Hg)
Water
Components Azeotrope
Specific
Gravity
at
20/20°C
1 1255 288 0
277 9
8
In
Azeotrope
271 5 35
65
1 1255 145 5 (a) Azeo (a) 28
72
1 1255 288 0
286 5
1 1255 288 0
256 1
1 1255
1 1184
135 3 (a)
108 0 (a)
1 1255 288 0
263 0
1 1255 288 0
284 5
1 1255 288 0
298 5
1 1255 288 0
262 0
1 1255 288 0
268 0
1 1255 288 0
277 5
1 1255 288 0
283 2
1 1255 288 0
315 0
1 1255
1 0677 (b)
1 1255
1 0677 (b)
1 1255
1 0000
1 1255
1 0000
Boiling Point
at
760 mm Hg,
0°C
288 0
259 0
141 0 (a)
102 0 (a)
288 0
100 0
161 0 (a)
11 0 (a)
Boiling Point
at
760 mm Hg,
0°C
280 0 40
60
None
None (a)
263 0 20
60
275 5 42
58
In
Upper
Layer
(c)
(c)
15
85
(c)
(c)
(c)
(c)
(c)
(c)
In
Lower
Layer
(c)
(c)
60
40
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
U 72
L 28
< 285 5 > 58 (c) (c) (c)
261 4 14
86
Reacts
269 0 30
70
277 0 33
67
286 0 80
20
258 7 3
97
None (a)
None
None (a)
(a) At the pressure investigated; (b) At 30/20°C; (c) Data not available
Composition % by Wt at 20°C
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
Relative
Volume
of
Layers At
20°C, %
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
Properties

Properties
Figure 1: Freezing Points of
Aqueous Triethylene Glycol Solutions
Figure 1
Freezing Points of Aqueous Triethylene Glycol Solutions
Temperature, °C
10
0
-10
-20
-30
-40
-50
0 10 20 30 40 50 60 70 80 90 100
Triethylene Glycol, Percent by Weight in Water
9
50
40
30
20
10
0
-10
-20
-30
-40
-50
-60
Temperature, °F
Properties

Properties
Figure 2: Boiling Points vs. Composition of
Aqueous Figure Triethylene 2 Glycol Solutions at Various Pressures
Boiling Points vs Composition of Aqueous Triethylene
Glycol Solutions at Various Pressures
Temperature, °C
350
300
250
200
150
100
50
1520 mm Hg*
760 mm Hg
300 mm Hg
0 10 20 30 40 50 60 70 80 90 100
Triethylene Glycol, Percent by Weight in Water
*2 atmospheres absolute, 1 atmosphere gauge
*2 atmospheres absolute, 1 atmosphere gauge
10
660
620
580
540
500
460
420
380
340
300
260
220
180
140
Temperature, °F
Properties

Properties
Figure 3: Condensation Temperatures vs. Composition of
Aqueous Triethylene Glycol Solutions at Various Pressures
Figure 3
Condensation Temperatures vs Composition of Aqueous Triethylene
Glycol Solutions at Various Pressures
Temperature, °C
350
300
250
200
150
100
50
1520 mm H g *
760 mm Hg
300 mm Hg
0 10 20 30 40 50 60 70 80 90 100
Triethylene Glycol, Percent by Weight in Water
*2 atmospheres absolute, 1 atmosphere gauge
*2 atmospheres absolute, 1 atmosphere gauge
11
660
620
580
540
500
460
420
380
340
300
260
220
180
140
Temperature, °F
Properties

Properties
Figure 4: Vapor Pressures of Triethylene Glycol
at Various Temperatures
Figure 4
Vapor Pressures of Triethylene Glycol at Various Temperatures
Vapor Pressure, mm Hg
1000
800
600
400
300
200
100
80
60
40
30
20
10
8
6
4
3
2
Temperature, °F
220 240 280 320 360 400 440 480 560 640
1
100 120 140 160 180 200 240 280 320 360
Temperature, °C
Triethylene Glycol Antoine Constants for Calculating Vapor Pressure
Triethylene Glycol Antoine Constants for Calculating Vapor Pressure
3-Constant Equation (Temperature Range = 150–300°C)
3-Constant Equation A = 7 (Temperature 6302007 Range = 150 - 300°C) Range = 150–300°C
A=
7.
63B
0=
22156
00
74581
P = mm RHg
ange
= 150
- 30
0°
C
B=
215
6C
. = 4165
58192442
T = °C P = mm
H g
Log (P) = A – B/(T + C)
C = 165
. 9210
44
2
T = ° C
Log 5-Constant 10 (P) = A – B/(T Equation + C) (Temperature Range = 360 15–712 51°K)
A = 95 5205 Range = 360 15–712 51°K
5-Constant Equation (Temperature Range = 360.15 - 712.51°K)
A=
95
. 52
05
R ange
= 36
0.
15
- 712
. 51K
B=
12
83
4.
7
P = Pa
C = 0.
0
T = K elvin
D = -9.6 6752
E=3.0015 x 10 -29
N=10
ln(P) = A – B/(T + C) + D(ln(T)) + ET N
B = 12834 7 P = Pa
C = 0 0 T = Kelvin
D = -9 66752
E = 3 0015 x 10-29 N = 10
ln(P) = A – B/(T + C) + D(ln(T)) + ETN 12
Triethylene Glycol
Antoine Constants
A = 7.6302007
B = 2156.4581
C = 165.92442
Log(P) = A–B/(t+C)
mm Hg, Log 10 , ˚C
Properties

Properties
Figure 5: Vapor Pressures of
Aqueous Triethylene Glycol Solutions at Various Temperatures
Figure 5
Vapor Pressures of Aqueous Triethylene Glycol Solutions
at Various Temperatures
Vapor Presure, mm Hg
Triethylene Glycol 3-Constant Antoine Antoine Constants Equation for LogCalculating (P) = A – B/(T + Vapor C)
10 Pressure
P = mm Hg, T = °C
3-Constant Antoine Equation
Log 10 (P) = A – B/(T + C)
P = mm Hg, T = °C
T riE
G , W t%
0
50
70
80
90
95
97
98
99
99
. 5
100
10,000
6,000
4,000
2,000
1,000
600
400
200
40
60
100
4 6
20
10
2
1
0.6
0.4
-40 -20 0 20 40
Temperature, ˚F
80 120 160 200 240 300
Freezing Point
Curves
0.2
0.1
-40 -20 0 20 40 60 80 100 130 160
Temperature, ˚C
Triethylene Glycol Antoine Constants for Calculating Vapor Pressure
TriEG, Wt% A B C
0 7 959199 1663 545 227 575
50 7 922294 1671 501 228 031
70
80 A
7 878546
7 837076
1681 363
1697 006 B
228 237
228 769
90 7 726126 1728 047 229 823
95 7 620215 1806 257 236 227
97 7 495349 1841 522 238 048
98 7 404435 1881 474 240 666
99 7 211145 1926 114 242 799
99 5 7 042989 1970 802 242 865
100 7 472115 2022 898 152 573
7.
95
919
9
7.
92
22
94
7.
87
85
46
7.
837
076
7.
72
612
6
7.
62
0215
7.
49
53
49
7.
40
44
35
7.
21114
5
7.
04
29
89
7.
47211
5
13
166
3.
54
5
1671.
501
1681
. 36
3
169
7.
00
6
172
8.
047
180
6.
257
1841.
52
2
1881
. 474
192
6.
114
197
0.
80
2
20
22
. 89
8
C
0
50
70
80
90
95
97
98
99
99.5
100
Triethylene Glycol, Percent by Weight in Water
22
7.
575
22
8.
031
22
8.
237
22
8.
769
22
9.
82
3
23
6.
22
7
23
8.
04
8
24
0.
66
6
24
2.
79
9
24
2.
86
5
Properties
152
. 573

Properties
Figure 6: Specific Gravities of Aqueous
Triethylene Glycol Solutions
Figure 6
Specific Gravities of Aqueous Triethylene Glycol Solutions
Specific Gravity at T/60°F = A + Bx + Cx 2
x = Weight % Triethylene Glycol
T , ° F
-5
0
0
50
100
150
20
0
25
0
30
0
Apparent Specific Gravity, T/60˚F
1.18
1.16
1.14
1.12
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.90
1.
05
02
1.
0319
1.
0121
0.
99
20
0.
98
04
0.
96
27
0.
9413
0.
9177
Freezing Point
Curves-50˚F
14
1.
82
68
E -3
1.
746
6E
-3
1.
5247
E -3
1.
7518
E -3
1.
5410
E -3
1.
40
68
E -3
1.
32
05
E -3
1.
2511
E -3
0˚F
50˚F
100˚F
150˚F
200˚F
250˚F
300˚F
0 10 20 30 40 50 60 70 80 90 100
Triethylene Glycol, Percent by Weight in Water
Specific Gravity at T/60°F = A + Bx + Cx 2
x = Weight % Triethylene Glycol
T, °F A B C
-50 1 0502 1 8268E-3 -5 2009E-6
0
50 A
1 0319
1 0121
1 7466E-3
1 5247E-3 B
-4 8304E-6
-2 8794E-6
100 0 9920 1 7518E-3 -5 4955E-6
150 0 9804 1 5410E-3 -4 3884E-6
200 0 9627 1 4068E-3 -3 5089E-6
250 0 9413 1 3205E-3 -2 7991E-6
300 0 9177 1 2511E-3 -2 0848E-6
C
-5
. 20
09
E -6
-4
. 83
04
E -6
-2
. 87
94
E -6
-5
. 49
55
E -6
-4
. 38
84
E -6
-3
. 50
89
E -6
-2
. 79
91E
-6
-2
. 08
48
E -6
Properties

Properties
Figure 7: Viscosities of
Aqueous Triethylene Glycol Solutions
Figure 7
Viscosities of Aqueous Triethylene Glycol Solutions
Viscosity, Centiposies (cP) = A x 10
x = Weight % Triethylene Glycol
T, °F
0
A
1 53010
Bx
B
2 9967E-2
50 1 09200 1 9348E-2
100 0 58916 1 5763E-2
150 0 37045 1 3481E-2
200
250
300
1.
530
0 27371 10
1.
090
218759
00
0 14026
1 1731E-2
9 7064E-3
8 1319E-3
T, °F A B
0
50
100
150
20
0
25
0
30
0
Viscosity, Centipoises
1000
600
400
200
100
60
40
20
10
6
4
2
1
0.6
0.4
0.2
0.
58
916
0.
37
04
5
0.
27
371
0.
187
59
0.
140
26
Freezing Point
Curves
15
2.
99
67E
-2
1.
93
48
E -2
1.
576
3E
-2
1.
34
81E
-2
1.
1731
E -2
9.
70
64
E -3
8.
1319
E -3
0˚F
50˚F
100˚F
150˚F
200˚F
250˚F
300˚F
0.1
0 10 20 30 40 50 60 70 80 90 100
Triethylene Glycol, Percent by Weight in Water
Viscosity, Centiposies (cP) = A x 10 Bx
x = Weight % Triethylene Glycol
Properties

Properties
Figure 8
Specific Heats of Aqueous Triethylene Glycol Solutions
Figure 8: Specific Heats of
Aqueous Triethylene Glycol Solutions
Specific Heat = A + BT+CT 2
T = Temperature, °C
T riE
G , W t%
0
10
20
30
40
50
60
70
80
90
100
Specific Heat, Btu/lb/˚F
1.1
1.0
0.9
0.8
0.7
0.6
0.5
Temperature, ˚F
-40 0 40 80 120 160 200 240 280 320 360
Freezing Point
Curves
0.4
-50 0 50 100 150 200
Temperature, ˚C
Specific Heat = A + BT+CT2 T = Temperature, °C
TriEG, Wt% A B C
0 1 00540 -2 7286E-4 2 9143E-6
10 A 0 96705 -2 7144E-5 B 2 4952E-6
20 0 92490 2 0429E-4 2 4524E-6
30 0 88012 4 3000E-4 1 6952E-6
40 0 83229 6 2286E-4 1 3714E-6
50 0 78229 7 9286E-4 1 0857E-6
60 0 72200 9 4000E-4 8 0000E-7
70 0 66688 1 0871E-3 4 7620E-7
80 0 60393 1 2043E-3 2 8571E-7
90 0 53888 1 2800E-3 1 9048E-7
100 0 48614 1 3929E-3 -5 7140E-8
1.
00
54
0
0.
967
05
0.
924
90
0.
88
012
0.
83
22
9
0.
78
22
9
0.
72
20
0
0.
66
68
8
0.
60
39
3
0.
53
88
8
0.
48
614
16
-2
. 72
86
E -4
-2
. 7144
E -5
2.
04
29
E -4
4.
30
00
E -4
6.
22
86
E -4
7.
92
86
E -4
9.
40
00
E -4
1.
08
71E
-3
1.
20
43
E -3
1.
28
00
E -3
1.
39
29
E -3
C
0
20
10
30
40
50
60
70
80
90
100
2.
9143
E -6
2.
49
52
E -6
2.
45
24
E -6
1.
69
52
E -6
1.
3714
E -6
1.
08
57E
-6
8.
00
00
E -7
4.
762
0E
-7
2.
8571
E -7
1.
90
48
E -7
-5
. 7140
E -8
Triethylene Glycol, Percent by Weight in Water
Properties

Properties
Figure 9: Thermal Conductivities of
Aqueous Triethylene Glycol Solutions
Figure 9
Thermal Conductivities of Aqueous Triethylene Glycol Solutions
Thermal Conductivity = A + BT
T = Temperature, °C
TriEG, Wt% A B
0
10
20
30
40
50
60
70
80
90
100
Thermal Conductivity, Btu (ft)/hr (ft 2 ) ˚F
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
Temperature, ˚F
0 40 80 120 160 200 240 280 320 360
Freezing Point
Curves
0.05
-20 0 20 40 60 80 100 120 140 160 180 200
Temperature, ˚C
Thermal Conductivity = A + BT
T = Temperature, °C
TriEG, Wt% A B
0 0 33667 7 1667E-4
10 0 31000 6 0000E-4
20 0 29000 4 0000E-4
30 0 27200 2 0000E-4
40 0 25133 3 3333E-5
50 0 22767 3 3333E-5
60 0 20933 -1 6667E-4
70 0 18800 -2 0000E-4
80 0 17267 -2 8333E-4
90 0 15567 -2 8333E-4
100 0 14133 -3 1667E-4
0.
33
667
0.
3100
0
0.
29
00
0
0.
27
20
0
0.
2513
3
0.
22
767
0.
20
93
3
0.
188
00
0.
172
67
0.
155
67
0.
1413
3
17
7.
1667
E -4
6.
00
00
E -4
4.
00
00
E -4
2.
00
00
E -4
3.
33
33
E -5
3.
33
33
E -5
-1.
66
67E
-4
-2
. 00
00
E -4
-2
. 83
33
E -4
-2
. 83
33
E -4
-3
. 1667
E -4
0
10
20
30
40
50
60
70
80
90
100
Triethylene Glycol, Percent by Weight in Water
Properties

Properties
Figure 10
Dew Points of Aqueous Triethylene Glycol Solutions at
Various Contact Temperatures
Figure 10: Dew Points of Aqueous Triethylene Glycol Solutions at
Various Contact Temperatures
Dew or Frost Point = A + BT
T = Temperature, °C
TriEG, Wt% 50 A -3 0308 1 01050 B
50
70
80
90
95
98
99
99
. 5
Frost Point, ˚C Dew Point, ˚C
60
50
40
30
20
10
0
-10
-20
-30
-40
Contact Temperatures of Solution, ˚F
-20 0 20 40 60 80 100 120
Freezing Point
Curves
-50
-30 -20 -10 0 10 20 30 40 50
Contact Temperatures of Solution, ˚C
Dew or Frost Point = A + BT
T = Temperature, °C
TriEG, Wt% A B
70 -7 0009 1 01610
80 -10 745 1 01160
90 -17 923 0 98187
95 -25 252 0 93019
98 -34 675 0 85598
99 -41 419 0 80150
99 5 -47 195 0 73263
-3
. 03
08
-7.
00
09
-10
. 745
-17.
92
3
-2
5.
25
2
-3
4.
675
-41.
419
-47.
195
18
Triethylene Glycol,
Percent by Weight
in Water
50
70
1.
010
50
1.
01610
1.
0116
0
0.
9818
7
0.
93
019
0.
85
59
8
0.
8015
0
0.
73
26
3
80
90
95
98
99
99.5
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
-10
-20
-30
-40
-50
Frost Point, ˚F Dew Point, ˚F
Properties

Properties
Figure 11: Comparative Hygroscopicities of
Various Figure Glycols 11 at 70°F (21°C)
Comparative Hygroscopicities of Various Glycols at 70°F (21°C)
Percent Water (Based on Dry Humectant at Equilibrium)
100
80
70
60
50
40
30
20
10
8
7
6
Propylene Glycol
Diethylene Glycol
Triethylene Glycol
5
25 30 35 40 45 50 55 60 65 70 75
Percent Relative Humidity
19
Ethylene Glycol
Dipropylene Glycol
Properties

Properties
Figure 12: Refractive Indices of
Pure Triethylene Glycol
Figure 12
Refractive Indices of Pure Triethylene Glycol
Reactive Index
1.460
1.458
1.456
1.454
1.452
1.450
1.448
1.446
20 22 24 26 28 30 32 34 36 38 40
Temperature, ˚C
Refractive Index = 1 4626 – 0 000340T
Refractive
T = Temperature,
Index =
°C
1.4626 – 0.000340T
T = Temperature, °C
20
Properties

Properties
Figure 13: Refractive Indices of
Aqueous Figure Triethylene 13 Glycol Solutions at 77°F (25°C)
Refractive Indices of Aqueous Triethylene Glycol Solutions at 77°F (25°C)
Reactive Index
1.50
1.48
1.46
1.44
1.42
1.40
1.38
1.36
1.34
1.32
1.30
0 10 20 30 40 50 60 70 80 90 100
Triethylene Glycol, Percent by Weight in Water
Refractive
Refractive
Index,
Index, 77°F
77°F
(25°C)
(25°C)
= 1
1.3326
3326 +
+
0
0.0012403
0012403 x
x
x
=
Weight
Weight % Triethylene
Triethylene
Glycol
Glycol
21
Properties

Properties
Figure 14: Surface Tensions of
Pure Triethylene Glycol
Figure 14
Surface Tensions of Pure Triethylene Glycol
Surface Tension, dynes/cm
46
44
42
40
38
36
40 80 120 160 200 240 280
34
0 50
Temperature, ˚F
Temperature, ˚C
Surface Tension, dynes/cm = 47 330 – 0 088T
Surface Tension, dynes/cm = 47.330 – 0.088T
T = Temperature, °C
T = Temperature, °C
22
100 150
Properties

Properties
Figure 15: Surface Tensions of
Aqueous Triethylene Glycol Solutions at 77°F (25°C)
Figure 15
Surface Tensions of Aqueous Triethylene Glycol Solutions at 77°F (25°C)
Surface Tension, dynes/cm
80
70
60
50
40
30
0 10 20 30 40 50 60 70 80 90 100
Triethylene Glycol, Percent by Weight in Water
23
Properties

Properties
Figure 16: Electrical Conductivities of
Aqueous Triethylene Glycol Solutions
Figure 16
Electrical Conductivities of Aqueous Triethylene Glycol Solutions
Electrical Conductivity, micromhoms/cm
12
10
8
6
4
2
0
0 10 20 30 40 50 60 70 80 90 100
Triethylene Glycol, Percent by Weight in Water
Note: The quality of the water used for dilution can significantly affect
Note: The quality of water used for dilution can significantly affect
the electrical conductivity
electrical conductivity.
24
Properties

Health and
Environmental Information
Health Effects
See our current Material Safety Data Sheet
for the most current exposure limits, health,
first aid, and toxicology information .
Environmental Information
See our current Material Safety Data Sheet
for current toxicity information .
Biodegradation
For information concerning the biodegradability
of triethylene glycol, please refer to
the latest Material Safety Data Sheet .
25
Health and Environmental Information

Storage and
Handling
This information is offered as a guide in
planning bulk storage facilities for glycols .
Glycols are generally considered to be stable,
noncorrosive chemicals with high flash
points . Under ordinary conditions, all of
these chemicals can be stored in mild steel
vessels . For long-term storage, or if trace
iron contamination and the development of
color are objectionable in any of the glycols,
a storage vessel lined with a baked-phenolic
resin, an air-drying epoxy-phenolic resin, or
a vinyl resin or a stainless steel or aluminum
tank is suggested . Zinc or galvanized iron
is not recommended, and copper or copper
alloys may cause product discoloration .
It is not general practice to use an inert gas
in the vapor space of glycol storage tanks,
because all chemicals in this family have
high boiling points and the vapors in the
tanks are relatively nonflammable . However,
if extremely low water content is required,
consistent with a long storage period, a
nitrogen blanket can be used to exclude
atmospheric moisture and air . Blanketing
with nitrogen will also minimize low-level
oxidation, if necessary for the desired
application . The inert gas prevents air
oxidation in order to maintain product
within acidity specifications . Increased
acidity enhances iron pickup from steel
vessels . Alternatively, a desiccant unit can
be installed on the tank vent line to dry
incoming air .
If above-ground outside storage is planned,
it may be necessary to install provisions for
heating tanks and lines . Many glycols have a
26
moderately high freezing point or become
relatively viscous at severe winter temperatures
. However, excessive temperature can
cause undesirable degradation of glycols .
Automatic controls are suggested to limit the
temperature of the contents to 120°F (49°C) .
In cold climates, it is generally desirable
to make provisions for draining the pump
and the transfer lines if they are outside
the building . If this is not feasible, it may
be necessary to insulate and steam trace or
otherwise heat the transfer lines to prevent
freezing of the product . Care must be taken
in such an application, because continued
exposure of glycols to high temperatures,
greater than 120°F (49°C), will result in
product degradation . Transfer piping of
mild steel is generally used .
Shipping Data
Triethylene glycol is not regulated by the U .S .
Department of Transportation; therefore,
it does not have a DOT Shipping Name,
Hazard Classification, DOT Warning Label,
or Identification Number .
Shipping Data For Triethylene Glycol
Weight per Gallon at 20°C 9 36 lb
Coefficient of Expansion at 55°C 0 00072
Flash Point, Pensky-Martens Closed Cup 350°F
Net Contents and Type of Container
1-Gallon Tin Can 9 0 lb
5-Gallon DOT 17E, Pail 47 lb
55-Gallon DOT 17E, Drum 522 lb
Storage and Handling

Product Safety
When considering the use of triethylene
glycol in any particular application, review
and understand our current Material Safety
Data Sheet for the necessary safety and
health information . For Material Safety
Data Sheets and other product safety
information on Dow products, contact The
Dow Chemical Company sales office nearest
you . Before handling any products mentioned
in this booklet, you should obtain the
available product safety information from
the suppliers of those products and take the
necessary steps to comply with all precautions
regarding the use of triethylene glycol .
No chemical should be used as or in a food,
drug, medical device, or cosmetic, or in a
product process in which it may come in
contact with a food, drug, medical device,
or cosmetic until the user has determined the
27
suitability of the use . Because use conditions
and applicable laws may differ from one
location to another and may change with time,
Customer is responsible for determining
whether products and the information in this
document are appropriate for Customer’s
use and for ensuring that Customer’s workplace
and disposal practices are in compliance
with applicable laws and other governmental
enactments .
Dow requests that the customer read,
understand, and comply with the information
contained in this publication and the
current Material Data Safety Sheet(s) . The
customer should furnish the information in
this publication to its employees, contractors,
and customers, or any other users of
the product(s), and request that they do
the same .
Product Safety

Emergency Service
The Dow Chemical Company maintains an around-the-clock emergency service for its
products . The Chemical Manufacturers Association (CHEMTREC), Transportation
Canada (CANUTEC), and the Chemical Emergency Agency Service maintain an
around-the-clock emergency service for all chemical products .
Mainland United States
and Puerto Rico
Alaska and Hawaii
Canada
Location Dow Products All Chemical Products
Continental Europe, Middle East,
North and Central Africa
United Kingdom and Ireland
Latin America, Asia/Pacific, South
Africa and any other location,
worldwide
If you are at sea, radio U S Coast
Guard, who can directly contact
Dow HELP or CHEMTREC
Phone Dow HELP:
(800) 822-4357 (toll-free)
Phone Mainland United States:
(800) 822-4357 (toll-free)
Phone Dow:
(519) 339-3711 (collect)
Phone:
+31 115 694982
Phone National Chemical
Emergency Center (Culham-UK):
44-1553-761-251
(44)(0) 1865-407-333
Phone United States:
(800) 822-4357 (toll-free)
Phone Dow HELP:
(800) 822-4357 (toll-free)
DO NOT WAIT Phone if in doubt You will be referred to a specialist for advice
28
Phone CHEMTREC:
(800) 424-9300 (toll-free)
Phone CHEMTREC:
(800) 424-9300 (toll-free)
Phone CANUTEC:
(613) 996-6666 (collect)
Phone CHEMTREC
(United States):
(703) 527-3887 (collect)
Phone CHEMTREC
(United States):
(703) 527-3887 (collect)
Phone CHEMTREC:
(703) 527-3887 (collect)
Phone CHEMTREC:
(800) 424-9300 (toll-free)
Emergency Service

Sales Office
For additional information, contact our
customer service center:
The Dow Chemical Company
2040 Dow Center
Midland, MI 48674
www dow com
Phone: (800) 232-2436
29
Sales Office

NOTICE: No freedom from any patent owned by Seller or others is to be inferred Because use conditions and applicable laws may differ from one
location to another and may change with time, Customer is responsible for determining whether products and the information in this document are
appropriate for Customer’s use and for ensuring that Customer’s workplace and disposal practices are in compliance with applicable laws and
other governmental enactments Seller assumes no obligation or liability for the information in this document NO WARRANTIES ARE GIVEN;
ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED
Published February 2007 ®Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow Form No: XXX-0207X CRCG