The powder is explosive when dry and should therefore always be stored under water in a container with a cork stopper. Toxicity data for this compound are not yet available. Handle with care. It is a severe eye and respiratory tract irritant and will cause burns to the skin. If ingested it will cause severe abdominal pain.
Inhalation leads to irreversible lung damage.
In the presence of moisture it will liberate sulphurous acid which can cause severe burns to the eyes, respiratory tract and skin when the skin is moist. Ingestion will cause severe pain whilst large doses may cause colic and diarrhoea, circulatory disturbances and depression of the nervous system resulting in death. It is corrosive and if ingested can cause nausea, vomiting and kidney damage. Check for compatibility before adding to other chemicals. It is an eye and skin irritant and toxic by inhalation or ingestion.