Cobalt(II) iodide

  • Cobaltous iodide
  • Cobalt diiodide
Formula
CoI2
Structure
Description
Black crystals with a slight iodine odor. Hygroscopic.
Uses
Indicator for moisture and humidity.

Registry Numbers and Inventories.
CAS
15238-00-3
EC (EINECS/ELINCS)
239-283-2
Merck
12,2504
Canada DSL/NDSL
NDSL
US TSCA
Listed
Korea ECL
Listed

Properties.
Formula
CoI2
Formula mass
312.74
Melting point, °C
515
Boiling point, °C
570
Density
5.68 g/cm3
Solubility in water
Soluble

Hazards and Protection.
Storage
Store in tightly closed containers in a cool, dry place.
Protection
Wear protective clothing to prevent contamination of skin and clothes. Neoprene gloves and safety glasses.
Small spills/leaks
Wear a self contained breathing apparatus and full protective clothing. Isolate the area where the spill occurred and insure that proper ventilation is available and that water/moisture is kept out of the area. Vacuum up spill using a high efficiency unit and place in a container for proper disposal. Take care not to raise dust.
Stability
Unstable.
Incompatibilities
Strong acids, strong bases, oxidizers, moisture/air.

Fire.
Fire fighting
Do NOT use Water. Use dry chemical, CO2. Wear a self contained breathing apparatus and full protective clothing to prevent contact with skin and eyes.
Combustion products
When heated to decomposition, may emit toxic fumes of iodine.
Health
3
 
Flammability
0
 
 
Reactivity
1
 

Health.
Exposure limit(s)
OSHA/PEL: 0.1 mg/m3 (as Co) (0.1 ppm I2)
Exposure effects
Co compounds: Experimental evidence shows that the toxicity of cobalt by mouth is low. In animals, administration of cobalt salts produces polycythemia. May cause kidney and liver damage in humans. Locally, cobalt has been shown to produce dermatitis. There have also been reports of hematologic, digestive, and pulmonary changes in humans. It is a suspected carcinogen of the connective tissue and lungs. Prolonged absorption of iodides may produce “idoism” which is manifested by skin rash, running nose, headache and irritation of the mucous membrane. In severe cases, the skin may show pimples, boils, redness, black and blue spots, hives and blisters. Weakness, anemia, loss of weight and general depression may occur.
   Inhalation
May cause coughing, sneezing, difficulty breathing and irritation of mucous membrane of the respiratory tract.
   Skin
May cause itching, irritation, inflammation and dermatitis.
   Eyes
May cause irritation, burning sensation, redness, and watering of the eyes if comes in contact with them. There may be risk of serious injury.

First aid
 
   Ingestion
Give 1-2 glasses of milk or water. Induce vomiting, seek immediate medical attention.
   Inhalation
Remove to fresh air. Administer oxygen if breathing is difficult. Seek medical attention.
   Skin
Remove any contaminated clothing, brush material off of skin, flush with running water and soap. Seek medical attention.
   Eyes
Flush with lukewarm water for at least 15 minutes. Seek medical attention.

Transport.