Peroxide Formers

Peroxide formers can react with oxygen to create compounds that can explode with heat, impact or friction. ECU faculty and staff are discouraged from purchasing large quantities of these materials. Peroxide formers have shelf lives based on their composition. Do not force open peroxide forming chemical containers, or those with obvious signs of crystallization. Segregate the chemical and store in secondary containment. Label the bottle, secondary containment, and storage cabinet as “Potentially Explosive Chemical.” Write the date the chemical was received and date the chemical was opened.

EH&S recommends utilizing test strips regularly after containers have been opened to ensure peroxides have not developed, and dispose through ECU Hazardous Waste by their expiration date if unopened, or shelf life date after opening (3-12 months based on material type). Contact EH&S with any questions or concerns at 252-328-6166 or safety@ecu.edu.

List A chemicals should be tested for peroxide formation before using or discarded after 3 months.

List B chemicals should be tested for peroxides before distillation or evaporation and tested for peroxide formation or discarded after 1 year.

List C chemicals should be tested for peroxide formation or discard liquids after 6 months; and gases after 1 year.