Chemical Storage by Hazard Class

A recent inventory for all laboratories was distributed to department chairs detailing hazard class of the materials in each laboratory.  Chemicals can be segregated by hazard class using the following system:

The following groups should be separated:

1. COR - acids and bases – acids should be segregated from all other materials preferably in an acids cabinet.  Within the acid category oxidizing acids should be segregated from organic acids.  Bases should be segregated from all other materials. 

2. OX1, OX2, OX3, OX4 - oxidizing agents should be stored away from reducing agents and combustible/flammable materials.

3. EXP - potentially explosive materials – should be individually analyzed and stored according to manufacturer recommendations

4. WR1, WR2, WR3 - water reactive materials - should be stored in cool, dry place away from any water source. 

5. PYR - pyrophoric chemicals – should be stored in a cool, dry place making provisions for an airtight seal.

6. OP1, OP2, OP3, OP4, OP5, OPD - organic peroxides - these must be properly managed and disposed of within recommended time periods.  Label containers with receiving, opening and disposal dates.

7. F1A, F1B, F1C, CL2, C3A, C3B – flammable & combustible liquids – should be stored in a flammable liquids cabinet segregated from other types of chemicals.

8. UR1, UR2, UR3, UR4 – Unstable/reactive – further evaluation for compatibility within this category must occur. Unstable/reactive chemicals generally have storage precautions specified by the manufacturer.

9. Chemicals with health hazards including irritants (IRR), carcinogens (CAR), Sensitizers (SEN), Toxic (TOX), Highly toxic (HTX) and other health hazard (OHH) should be stored in a specially designated “health hazard” cabinet.

10. NON – Non-hazardous – can generally be stored in general chemical storage area   unless special storage is indicated by the manufacturer.

For in-laboratory assistance & evaluation please contact Risk Management & Safety at 895-4226