Chemical
Cadmium bromide
CAS 7789-42-6 · EC 232-165-1 · Br2Cd
Also known as cadmium dibromide
NOAA CAMEO Chemicals also lists it as a poison (UN 2570); ingestion can cause kidney and liver injury. Potassium bromide can replace it in a collodion halide mix.
- Signal word
- Warning
- CAS
- 7789-42-6
- EC number
- 232-165-1
- UK/EU status
- 1 rule
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 (CLP Annex VI).
Harmonised classes: Acute Tox. 4 (Inhalation)* (H332); Acute Tox. 4 (Dermal)* (H312); Acute Tox. 4 (Oral)* (H302); Aquatic Acute 1 (H400); Aquatic Chronic 1 (H410). The harmonised entry does not classify cadmium bromide as a carcinogen. Industry notifications are mixed: 85.71% match the harmonised classes, 7.14% say not classified, and one notifier each (3.57%) adds Carc. 1B (H350) or Carc. 1A (H350) with Muta. 1B (H340) and STOT RE 1 (H372). Other cadmium compounds, such as the oxide and chloride, do carry harmonised carcinogen classes.
Signal word: Warning
Harmful or irritant · Hazardous to the environment
| Code | Hazard statement |
|---|---|
| H332 | Harmful if inhaled. |
| H312 | Harmful in contact with skin. |
| H302 | Harmful if swallowed. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
UK and EU rules
- REACH Restriction List (Annex XVII): indirect entry through the group 'Cadmium and its compounds' (ECHA CHEM)
Photographic uses
- bromo-iodizer for wet plate collodion (tintype, ambrotype)