Corrigendum - REACH24H Consulting Group

2.4.3.2.3.2 A substance shall not be classified in Division 4.2 if:
(a) A negative result is obtained in a test using a 100 mm cube sample at 140 °C;
(b) A positive result is obtained in a test using a 100 mm sample cube at 140 °C and a
negative result is obtained in a test using a 25 mm cube sample at 140 °C, a negative result
is obtained in a test using a 100 mm cube sample at 120 °C and the substance is to be
transported in packages with a volume not more than 3 m 3 ;
(c) A positive result is obtained in a test using a 100 mm sample cube at 140 °C and a
negative result is obtained in a test using a 25 mm cube sample at 140 °C, a negative result
is obtained in a test using a 100 mm cube sample at 100 °C and the substance is to be
transported in packages with a volume not more than 450 litres.
2.4.3.3 Assignment of packing groups
2.4.3.3.1 Packing group I shall be assigned to all pyrophoric solids and liquids.
2.4.3.3.2 Packing group II shall be assigned to self-heating substances which give a positive result in a test
using a 25 mm sample cube at 140 °C.
2.4.3.3.3 Packing group III shall be assigned to self-heating substances if:
(a) A positive result is obtained in a test using a 100 mm sample cube at 140 °C and a
negative result is obtained in a test using a 25 mm cube sample at 140 °C and the
substance is to be transported in packages with a volume of more than 3 m 3 ;
(b) A positive result is obtained in a test using a 100 mm sample cube at 140 °C and a
negative result is obtained in a test using a 25 mm cube sample at 140 °C, a positive result
is obtained in a test using a 100 mm cube sample at 120 °C and the substance is to be
transported in packages with a volume of more than 450 litres;
(c) A positive result is obtained in a test using a 100 mm sample cube at 140 °C and a
negative result is obtained in a test using a 25 mm cube sample at 140 °C and a positive
result is obtained in a test using a 100 mm cube sample at 100 °C.
2.4.4 Division 4.3 - Substances which in contact with water emit flammable gases
2.4.4.1 Definitions and properties
Certain substances in contact with water may emit flammable gases that can form explosive
mixtures with air. Such mixtures are easily ignited by all ordinary sources of ignition, for example naked lights,
sparking handtools or unprotected light bulbs. The resulting blast wave and flames may endanger people and the
environment. The test method referred to in 2.4.4.2 is used to determine whether the reaction of a substance with
water leads to the development of a dangerous amount of gases which may be flammable. This test method shall
not be applied to pyrophoric substances.
2.4.4.2 Classification in Division 4.3
Copyright@United Nations, 2011. All rights reserved.
Substances which in contact with water emit flammable gases shall be classified in Division 4.3 if,
in tests performed in accordance with the test method given in the Manual of Tests and Criteria, Part III,
sub-section 33.4.1:
(a) Spontaneous ignition takes place in any step of the test procedure; or
(b) There is an evolution of a flammable gas at a rate greater than 1 litre per kilogram of the
substance per hour.
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