- Cobalt dibromide
- Cobalt(II) bromide
Cobaltous bromide is a red violet crystalline solid.
Chiefly in hygrometers, also as catalysts for organic reactions.
Registry Numbers and Inventories.
Japan ENCS (MITI)
Melting point, °C
4.909 g/cm3 (20 C)
Solubility in water
Hazards and Protection.
Keep containers tightly closed in a well ventilated area away from food products. Keep away from heat and water.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate protective gloves, clothing and goggles.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: Neutralize with agricultural lime (CaO), crushed limestone (CaCO3), or sodium bicarbonate (NaHCO3). Adjust pH to neutral (pH=7). Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.
Hygroscopic, forms hexahydrate in air solution containing cobaltous ion.
Reacts as acid to neutralize bases.
When heated to decomposition can give off highly toxic fumes of bromide.
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.)
Containers may explode when heated.
When heated to decompose can give off highly toxic fumes of bromide.
NIOSH REL: TWA 0.05 mg/m3 (as Co) OSHA PEL: TWA 0.1 mg/m3 (as Co) 20 mg/m3 (as Co)
Fever may occur with chronic intoxication. Acute intoxication can result in CNS depression and coma. Bromides cross the placenta and may be detected in the milk of nursing mothers. Case reports suggest that prenatal exposure may cause growth retardation, craniofacial abnormalities and developmental delay.
Nausea and vomiting occur following acute or chronic ingestion. Anorexia and weight loss may occur with chronic intoxication.
An interstitial fibrotic pulmonary process has been described among hard metal workers and diamond polishers.
Bromide toxicity is associated in about 25% of cases with the development of bromoderma, an erythematous, nodular or acneiform rash over the face and possibly the entire body. One case of toxic epidermal necrolysis has been reported.
Pupils may be normal, miotic or mydriatic. Nystagmus is common.
Seek medical assistance.
Move to fresh air.
Wash with water.
Wash with water then irrigate with 0.9% saline for at least 15 minutes.
USCG CHRIS Code
Std. Transport #