Updated January 2003
Chemical Hygiene Plan
Section 3.3 - Chemical Safety
C. Incompatible
Chemicals
Certain hazardous chemicals cannot be mixed or stored
safely with other chemicals due to potentially severe or extremely toxic reactions taking
place. For example, keep oxidizing agents separated from reducing agents, initiators
separated from monomers, and acids separated from alkalis, etc.
The chemical label and Material Safety Data Sheet will contain information on
incompatibilities.
A list of incompatible chemicals is included in Appendix B.
D. Chemical Stability
Stability refers to the susceptibility
of the chemical to decomposition. Ethers, liquid paraffins, and olefins can form peroxides
on exposure to air and light. Since these chemicals are packaged in an air atmosphere,
peroxides can form even though the containers have remained sealed. Some inorganic
chemicals also are unstable.
Unless inhibitor was added by the manufacturer, closed containers of ethers shall
be discarded after one year. See Section 3.4 - "Chemical Waste" for disposal procedures. Appropriate use of peroxide inhibitors is
suggested.
Examples of potential peroxide forming materials are included in Appendix A.
E.
Shock-Sensitive Chemicals
Shock-sensitive refers to the sensitivity of the chemical
to decompose rapidly or explode when struck, vibrated, or otherwise agitated.
The label and Material Safety Data Sheet will indicate if a chemical is shock-sensitive.
Shock-sensitive chemicals should be procured as needed to minimize storage problems.
Shock-sensitive materials should be considered individually and disposed of as soon as
practical.
Many chemicals become increasingly shock-sensitive with age. The date received and date
opened shall be clearly marked on all containers of shock-sensitive chemicals.
Inhibitors are not to be added to shock-sensitive materials unless specific instructions
from the manufacturer are provided. See Section 3.4 - "Chemical Waste" for
disposal procedures.
A partial list of potential shock-sensitive materials is included in Appendix C.
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Material Safety Data Sheets
