General Description
Violet to red solid. Sinks and mixes slowly with water.
Reactivity Profile
COBALT FLUORIDE(10026-17-2) is a toxic, light brown crystalline material, when exposed to water COBALT FLUORIDE(10026-17-2) forms highly corrosive hydrofluoric acid. When heated to decomposition COBALT FLUORIDE(10026-17-2) emits toxic fumes of metallic cobalt and fluorides [Lewis, 3rd ed., 1993, p. 344].
Air & Water Reactions
Mixes slowly with water.
Health Hazard
INHALATION: Inhalation of dust may cause pulmonary symptoms. EYES: Irritation. SKIN: Skin rashes, dermatitis. INGESTION: Nausea and vomiting caused by local irritation.
Chemical Properties
Rose-red crystals or powder. Soluble in cold
water and hydrofluoric acid. Decomposes in hot
water. Ammine complexes can be prepared from
the hydrate.
Physical properties
Red tetragonal crystal; density 4.46 g/cm3; melts at 1,127°C; vaporizes around 1,400°C; sparingly soluble in water; soluble in warm mineral acids; decomposes in boiling water. Tetrahydrate is red orthogonal crystal; density 2.22 g/cm3; decomposes on heating; soluble in water; di- and trihydrates are soluble in water.
Uses
Catalyst for organic reactions.
Uses
Cobalt(II) fluoride can be used as a catalyst to alloy metals. It is also used for optical deposition, of which it tremendously improves optical quality. The compound may be used in dental care.
