Ingestion will cause dental erosion, bronchitis and respiratory difficulties. It is an eye 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.
A splash to the eye will cause irritation otherwise the solution is not harmful. 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.