Handle with care. Commercially manufactured preparations may not have been checked for virus and bacterial contamination. It is an animal carcinogen, a strong eye, skin and mucous membrane irritant and skin sensitiser. Death has been reported in workers exposed to high levels of formalin vapour. The vapour is also an irritant and corrosive.
Severe burns can result from exposure.
Chronic bronchitis, painful breathing, nausea, vomiting, dental erosion and sensitisation can also occur. It will cause eye irritation. All are quinone-imine dyes in the thiazin sub group and all are very toxic and irritate eyes and skin. The powder is flammable and should never be handled close to heat or a naked flame. It is hygroscopic and prolonged skin contact can cause dermatitis in sensitive individuals.