Chemical Hygiene Plan - Queensborough Community College ...
Chemical Hygiene Plan - Queensborough Community College ... Chemical Hygiene Plan - Queensborough Community College ...
heat a flammable liquid. Any areas using flammables should have a fire extinguisher present. If a fire extinguisher is not present, contact your EHSO for more assistance. Always keep flammable liquids stored away from oxidizers and away from heat or ignition sources such as radiators or electric power panels. When pouring flammable liquids, it is possible to generate enough static electricity to cause the flammable liquid to ignite. If possible, make sure that both containers are electrically interconnected to each other by bonding the containers and connecting to a ground. Always clean up any spills of flammable liquids promptly. Be aware that flammable vapors are usually heavier than air (vapor density > 1). For those chemicals with vapor densities heavier than air, it is possible for the vapors to travel along floors and, if an ignition source is present, result in a flashback fire. 7.3 Flammable Solids The OSHA Laboratory Standard defines a flammable solid as a “solid, other than a blasting agent or explosive, that is liable to cause fire through friction, absorption of moisture, spontaneous chemical change, or retained heat from manufacturing or processing, or which can be ignited readily and when ignited, burn so vigorously and persistently to create a serious hazard.” An example of a flammable solid is gun powder. Under the DOT Hazard Class System, flammable solids are listed as Hazard Class 4. Flammable solids are further broken down into three subcategories: • Flammable Solids – Class 4.1 • Spontaneously Combustible – Class 4.2 • Dangerous When Wet – Class 4.3 Many of the same principles for handling and storage of flammable liquids apply to flammable solids. Always keep flammable solids stored away from oxidizers, and away from heat or ignition sources such as radiators, electric power panels, and open flames. 7.4 Spontaneously Combustible Spontaneously combustible materials are also known as pyrophorics; these chemicals can spontaneously ignite in the presence of air, some are reactive with water vapor, and most are reactive with oxygen. Two common examples are tert-Butyllithium under Hexanes and White Phosphorus. In addition to the hazard of the spontaneously combustible chemical itself, many of these chemicals are also stored under flammable liquids. In the event of an accident, such as a bottle being knocked off a shelf, the chemical can spontaneously ignite and a fire can occur. Extra care must be taken when handling spontaneously combustible chemicals. When transporting these chemicals, it is best to use a bottle carrier and carts. 43
7.5 Dangerous When Wet “Dangerous when wet” compounds react violently with water to form toxic vapors and/or flammable gases that can ignite and cause a fire. Please note, attempting to put out a fire involving dangerous when wet materials with water will only make the situation worse. Special “Class D” fire extinguishers are required for use with dangerous when wet compounds. Common examples include sodium metal and potassium metal. It is important to note that any paper toweling, gloves, or other material that comes into contact with these materials should be quenched with water before being disposed in metal trash cans in order to prevent potential fires. If you are using “dangerous when wet” compounds and do not have a Class D fire extinguisher, please contact your EHSO for more assistance. 7.6 Oxidizers and Organic Peroxides The OSHA Laboratory Standard defines an oxidizer as “a chemical other than a blasting agent or explosive that initiates or promotes combustion in other materials, thereby causing fire either of itself or through the release of oxygen or other gases.” Under the DOT Hazard Class system, oxidizers are listed as Hazard Class 5.1 and organic peroxides are listed as Hazard Class 5.2. The OSHA Laboratory Standard defines an organic peroxide as “an organic compound that contains the bivalent –O-O- structure and which may be considered to be a structural derivative of hydrogen peroxide where one or both of the hydrogen atoms have been replaced by an organic radical.” Oxidizers and organic peroxides are a concern for laboratory safety due to their ability to promote and enhance the potential for fires in labs. As a reminder of the fire triangle (now referred to as the fire tetrahedron), in order to have a fire, you need: • A fuel source. • An oxygen source. • An ignition source. • A chemical reaction. Oxidizers can supply the oxygen needed for the fire, whereas organic peroxides supply both the oxygen and the fuel source. Both oxidizers and organic peroxides may become shock sensitive when they dry out, are stored in sunlight, are contaminated with other materials, particularly heavy metals. Most organic peroxides are also temperature sensitive. As with any chemicals, but particularly with oxidizers and organic peroxides, quantities stored on hand should be kept to a minimum. Whenever planning an experiment, be sure to read the MSDS and other reference documents to understand the hazards and special handling 44
- Page 1 and 2: LABORATORY SAFETY AND CHEMICAL HYGI
- Page 3 and 4: TABLE OF CONTENTS Purpose..........
- Page 5 and 6: Visiting Scientists and Other Simil
- Page 7 and 8: Cryogenic Safety...................
- Page 9 and 10: PURPOSE OF THIS MANUAL The main pur
- Page 11 and 12: The OSHA Laboratory Standard requir
- Page 13 and 14: 12. Maintain records and make them
- Page 15 and 16: 3. Keep the Department Chairperson,
- Page 17 and 18: 6. Before an extremely hazardous su
- Page 19 and 20: • Laboratories can use “price t
- Page 21 and 22: shipment of improperly labeled prod
- Page 23 and 24: • Do not smell or taste chemicals
- Page 25 and 26: 5.3 Inhalation Inhalation of chemic
- Page 27 and 28: Symptoms of skin exposure to chemic
- Page 29 and 30: 5.10 Toxic Effects Toxic effects ar
- Page 31 and 32: • All chemical containers MUST be
- Page 33 and 34: · Peroxidizable materials (aldehyd
- Page 35 and 36: 6.4 Transporting Chemicals When tra
- Page 37 and 38: liquids not in use should be kept i
- Page 39 and 40: 7. An inside storage room meeting a
- Page 41 and 42: VII. CHEMICAL HAZARDS Chemicals can
- Page 43: • Metal Picrate Salts • 2,4-Din
- Page 47 and 48: ways to remove them if discovered.
- Page 49 and 50: 1(800) 222-1222. If possible, bring
- Page 51 and 52: • Prior approval - Before anyone
- Page 53 and 54: everyone in the laboratory is aware
- Page 55 and 56: particularly hazardous substances
- Page 57 and 58: 8.7 Reproductive Toxins The OSHA La
- Page 59 and 60: 9.1 Chemical Fume Hoods Fume hoods
- Page 61 and 62: inspected, and initials of the insp
- Page 63 and 64: 9.4 Biological Safety Cabinet Certi
- Page 65 and 66: • Plan and prepare for your work
- Page 67 and 68: The topic of glove boxes can be con
- Page 69 and 70: 10.1 Standard Operating Procedures
- Page 71 and 72: paper, boxes, plastics, etc.) withi
- Page 73 and 74: 10.6 Working Alone In Appendix A of
- Page 75 and 76: • The nature of the experiment in
- Page 77 and 78: Additionally, as with installation
- Page 79 and 80: • Record keeping requirements •
- Page 81 and 82: Prescription Safety Eyewear OSHA re
- Page 83 and 84: different glove types. Different ma
- Page 85 and 86: • Natural Rubber Latex*** - Resis
- Page 87 and 88: The use of all types of respiratory
- Page 89 and 90: your College’s Emergency Procedur
- Page 91 and 92: • Check all pressure, temperature
- Page 93 and 94: If you have been trained and it is
heat a flammable liquid. Any areas using flammables should have a fire extinguisher present. If<br />
a fire extinguisher is not present, contact your EHSO for more assistance.<br />
Always keep flammable liquids stored away from oxidizers and away from heat or ignition<br />
sources such as radiators or electric power panels.<br />
When pouring flammable liquids, it is possible to generate enough static electricity to cause the<br />
flammable liquid to ignite. If possible, make sure that both containers are electrically<br />
interconnected to each other by bonding the containers and connecting to a ground.<br />
Always clean up any spills of flammable liquids promptly. Be aware that flammable vapors are<br />
usually heavier than air (vapor density > 1). For those chemicals with vapor densities heavier<br />
than air, it is possible for the vapors to travel along floors and, if an ignition source is present,<br />
result in a flashback fire.<br />
7.3 Flammable Solids<br />
The OSHA Laboratory Standard defines a flammable solid as a “solid, other than a blasting<br />
agent or explosive, that is liable to cause fire through friction, absorption of moisture,<br />
spontaneous chemical change, or retained heat from manufacturing or processing, or which can<br />
be ignited readily and when ignited, burn so vigorously and persistently to create a serious<br />
hazard.” An example of a flammable solid is gun powder.<br />
Under the DOT Hazard Class System, flammable solids are listed as Hazard Class 4. Flammable<br />
solids are further broken down into three subcategories:<br />
• Flammable Solids – Class 4.1<br />
• Spontaneously Combustible – Class 4.2<br />
• Dangerous When Wet – Class 4.3<br />
Many of the same principles for handling and storage of flammable liquids apply to flammable<br />
solids. Always keep flammable solids stored away from oxidizers, and away from heat or<br />
ignition sources such as radiators, electric power panels, and open flames.<br />
7.4 Spontaneously Combustible<br />
Spontaneously combustible materials are also known as pyrophorics; these chemicals can<br />
spontaneously ignite in the presence of air, some are reactive with water vapor, and most are<br />
reactive with oxygen. Two common examples are tert-Butyllithium under Hexanes and White<br />
Phosphorus. In addition to the hazard of the spontaneously combustible chemical itself, many of<br />
these chemicals are also stored under flammable liquids. In the event of an accident, such as a<br />
bottle being knocked off a shelf, the chemical can spontaneously ignite and a fire can occur.<br />
Extra care must be taken when handling spontaneously combustible chemicals. When<br />
transporting these chemicals, it is best to use a bottle carrier and carts.<br />
43
Change language