Silver nitrate
CAS 7761-88-8 · EC 231-853-9
Also known as lunar caustic
Not on the UK explosives precursors/poisons lists (checked GOV.UK list, 3 July 2026).
Handle chemistry safely
Wear gloves and eye protection, work with good ventilation, and read the supplier’s safety data sheet before use. Hazard information here is a summary, not a replacement for it. Dispose of all photographic chemistry correctly, in line with local laws and your local authority’s guidance. Never mix waste solutions, and check the supplier’s safety data sheet before disposing of anything.
Hazards
Official EU classification (harmonised under CLP Annex VI).
Signal word: Danger
Oxidising · Corrosive · Hazardous to the environment
- H272 May intensify fire; oxidiser.
- H314 Causes severe skin burns and eye damage.
- H410 Very toxic to aquatic life with long lasting effects.
Photographic uses
- salt print sensitiser
- Van Dyke brown
- kallitype
- hypo-alum toner (T-1a)
Used in: Kodak T-1a hypo-alum sepia toner, Van Dyke (Vandyke) brown