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Microsoft word - chemtracker_matrix_july_2010.doc
Improper storage of hazardous chemicals may result in degradation of chemical quality, deterioration of container labels,
release of toxic gases, fire, or even explosion. As a result, local and state regulations require that chemicals be stored
according to hazard class and compatibility. A significant amount of thought, planning, and research on the hazards
associated with the chemicals being stored may be required; especially in the research laboratory environment. Many
laboratory chemicals have multiple hazards making proper storage segregation a particularly difficult task. The following hazard class hierarchy (based on DOT1) is provided as a guide for prioritizing which hazard classes pose
the greatest risks during storage, (e.g., flammability is usually a more important consideration than toxicity).
Radioactive Pyrophoric Explosive Flammable Liquid Corrosive Acid/Base Water Reactive Flammable Solid Oxidizer Combustible Toxic
The table below is a general reference for identifying chemical hazard classes that should be kept separated. Note the
manufacturer hazard codes (i.e. Fisher Code) are not necessesarily a good indicator of chemical hazard class for
segregation purposes (i.e., all corrosives, code white, are not compatible and therefore should not be stored together).
All radioactive materials must be stored in accordance
with license and use restrictions. Contact the Campus Radiation Safety Officer for specific information 9-3911
Water Reactives, Air Reactives, Shock Sensitive
Segregate reactive chemicals compatibly with regard to
Liquids or solids that spontaneously ignite upon contact
Tributylaluminum; Lithium Hydride; Sodium
Explosives are chemical compounds, that may contain
Nitroglycerin; Lead Azide; Mercury Fulminate
nitrogen and that may detonate upon shock or heating.
All peroxide forming compounds must be dated and
Benzoyl Peroxide; old Ethers (e.g., Ethyl,
handled in accordance with campus policy; Liquids may
Methyl; Isopropyl); Tetrahydrofuran; Dioxane
be very flammable and should be stored in flammable storage cabinets
Acetone, Ethyl Ether, Petroleum Ether, Ethyl
Organic acids and non-flammable halogenated solvents
can generally be stored with flammable and combustible
Many Flammable Solids are also Reactives; Give careful
Picric Acid powder; Sodium; Calcium Carbide
Separate acids from bases and organic acids from
Oxidizing and Mineral acids (pH is usually 2)
Hydrochloric, Perchloric, Sulfuric, Phosphoric,
include organic acids). Perchloric acid
should be stored inside a glass or porcelain secondary container.
May be stored with flammable and combustible liquids.
Glacial Acetic Acid, Acetic Acid, Formic Acid
store with oxidizers or mineral and oxidizing
Caustic liquids and solids with pH 12.5
DO NOT STORE
May be included in other storage classes but kept
Teratogens, Carcinogens, Cyanides,
separate from low hazard materials. These materials
Formaldehyde, Methyl-nitrosourea, Acrylamide
should be easy to identify as highly toxic. Included in
this class are chemicals on the “Select Carcinogen List”
and those with specific regulatory requirements.
Agars, Sodium Chloride, Potassium Chloride,
Materials commonly used with no special hazards
Glycerine, Amino Acids
1 Consult the rest of this document then contact the Chemical Hygiene Coordinator or EH&S if you require further assistance. 2 UCSC Storage Groups Classification is available on the EH&S web site: http://ehs.ucsc.edu/lab_research_safety/fact_sheets.php
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