Cobalt(II) hydroxide

  • Cobaltous hydroxide
  • Cobalt dihydroxide
Formula
Co(OH)2
Structure
Description
Blue-green crystals
Uses
Production of Co compds.

Registry Numbers and Inventories.
CAS
21041-93-0
EC (EINECS/ELINCS)
244-166-4
20/21/22 36/37/38
26 37/39
RTECS
GG0904500
RTECS class
Tumorigen
Merck
13,2467
Beilstein/Gmelin
8813 (G)
Swiss Giftliste 1
G-10207
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
CoH2O2
Formula mass
92.95
Decomposition point, °C
300
Density
3.597 g/cm3 (15 C)
Solubility in water
Slightly soluble

Hazards and Protection.
Storage
Keep tightly closed. Store in a cool dry place. Store under nitrogen.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles.
Respirators
Government approved respirator.
Small spills/leaks
Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.
Incompatibilities
Strong oxidizing agents.
Decomposition
Nature of decomposition products not known.

Fire.
Fire fighting
Extinguish using Water spray. Carbon dioxide, dry chemical powder, or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Hazards
Emits toxic fumes under fire conditions.

Health.
Exposure limit(s)
0.02 mg/m3 TLV
Carcinogin
G-A3, I-2B
Poison_Class
2
Exposure effects
Harmful. Harmful by inhalation, in contact with skin and if swallowed. Irritating to eyes, respiratory system and skin.
   Inhalation
Material is irritating to mucous membranes and upper respiratory tract.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water.
   Eyes
In case of contact, immediately flush eyes with copious amounts of water for at least 15 minutes.

Transport.