It is an inflammable powder and should not be handled close to heat or a naked flame. It is a potential carcinogen and an eye, skin and mucous membrane irritant. It will cause severe burns to exposed skin and eyes. The vapour is also a strong irritant and corrosive. Always use a fume hood when handling this acid.
Heat is generated by the reaction which can be very violent.
It is highly toxic and an eye irritant. It is also a combustible powder and should never be handled close to heat or a naked flame. It is a primary skin irritant and a central nervous system depressant. It will defat skin and may cause dermatitis. Death has been caused from over exposure due to respiratory failure.