It is recommended to chemically test for peroxides periodically.
A label affixed to the outside of the container should indicate date of last test, and test results.
Test peroxide formers periodically. Record testing dates and test results.
Peroxide-forming labels to record testing date and results are available here: Chemical Label Request
Follow the same basic handling procedures as for flammable materials.
Peroxide Forming Chemicals: Description | Safe Storage Period |
---|---|
Unopened chemicals from manufacturer | 18 months |
Opened containers: Chemicals in Part A | 3 months |
Opened containers: Chemicals in Parts B and D | 12 months |
Opened containers: Uninhibited chemicals in Part C | 24 hours |
Opened containers: Inhibited chemicals in Part C | 12 monthsa |
a Do not store under inert atmosphere, oxygen required for inhibitor to function.
Ferrous thiocyanate will detect hydroperoxides with the following test:
These test strips are available from EM Scientific, cat. No. 10011-1 or from Lab Safety Supply, cat. No. 1162. These strips quantify peroxides up to a concentration of 25 ppm. Aldrich Chemical has a peroxide test strip, cat. No. Z10,168-0, that measures up to 100 ppm peroxide. The actual concentration at which peroxides become hazardous is not specifically stated in the literature. A number of publications use 100 ppm as a control value for managing the material safely.
Please note that these methods are BASIC protocols. Should a researcher perform one of these methods, all safety precautions should be thoroughly researched.
Any compound testing positive for peroxide formation must be disposed of via MSU EHS.