Sodium carbonate
CAS 497-19-8 · EC 207-838-8 · CNa2O3
Also known as washing soda (decahydrate), soda ash (anhydrous)
Kodak formulas specify the monohydrate (CAS 5968-11-6, not queried); Caffenol-C-M specifies anhydrous. ECHA data shown are for anhydrous CAS 497-19-8.
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: Warning
Harmful or irritant
- H319 Causes serious eye irritation.
Photographic uses
- accelerator (D-19, D-72, Ansco 130, Caffenol-C-M)
Used in: Kodak D-19, Kodak D-72 (Dektol-type), Caffenol-C-M