Not all of the physiological effects of organic peroxides were determined. MEKP causes skin irritations. Skin contact should be minimized by the use of appropriate clothing.

The eyes are extremely sensitive, therefore glasses or any similar type of protection must be used. The ingestion of MEKP can cause serious damages to internal organs. In case of ingestion, vomit must not be induced.

Tolerance Limits (TLV): 0.2 ppm (MEKP)

CONCENTRATIONS AND LETHAL DOSES (ACUTE SYMPTOMS)
Ingestion
LD 50 (mice)
480 mg/Kg (MEKP)
Inhalation
LD 50 (mice)
200 ppm (4 hr exposure)
Skin
LD 50
4000 mg/kg