Formalin Storage

The page below is a sample from the LabCE course OSHA Formaldehyde. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

Learn more about OSHA Formaldehyde (online CE course)
Formalin Storage

Formalin should be stored in a well-ventilated area away from oxidizing agents. Formaldehyde gas can form explosive mixtures in air when the concentration exceeds 7%. This could occur in the event of a fire.
Formalin should not be stored in the same cabinet as hydrochloric acid or chlorine-containing solutions, including bleach (sodium hypochlorite). Chemical reactions between these substances could occur that would form the potent carcinogen, bis(chloromethyl) ether.