CIDEX OPA Treatment

CIDEX® OPA is used commonly in hospitals and some research laboratories to disinfect medical and some research devices.

OPA (orthophthaldehyde) is very toxic to fish. Therefore, waste CIDEX® OPA needs to be treated before it can be poured down the drain. The OPA concentration in waste CIDEX® OPA is usually about 0.3-0.5%, but the King County sewer discharge limit is 0.01%.

Many commercial products are available to treat CIDEX® OPA. Follow product instructions for treatment time.

Please let us know if you begin to treat CIDEX® OPA by calling us at 206.616.5835 or emailing us at chmwaste@uw.edu. By law we are required to keep track of all hazardous waste treatment on campus. Please track the waste you treat using the Chemical Treatment Log.