Cobalt carbonyl

  • Cobalt tetracarbonyl
  • Octacarbonyldicobalt
Formula
Co2(CO)8
Structure
Description
Orange to dark brown crystalline solid.
Uses
Catalyst for hydroformylation, hydrogenation, hydrosilation, isomerization, carboxylation, carbonylation, and polymerization reactions.

Registry Numbers and Inventories.
CAS
10210-68-1
EC (EINECS/ELINCS)
233-514-0
EC Class
highly flammable, carcinogenic, sensitizing, harmful
R 17 40 43 48/20
S 23.2 36/37
RTECS
GG0300000
RTECS class
Tumorigen
UN (DOT)
1325
Merck
12,3135
Beilstein/Gmelin
6006 (G)
Swiss Giftliste 1
G-7038
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C8Co2O8
Formula mass
341.95
Melting point, °C
51
Boiling point, °C
95
Sublimation point, °C
40
Decomposition point, °C
52
Vapor pressure, mmHg
0.07
Vapor density (air=1)
12.0
Saturation Concentration
1974 ppm (0.2%) at 25 C (calculated)
Density
1.99 g/cm3 (23 C)
Solubility in water
Insoluble

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Store in a cool, dry place. Keep away from water. Refrigerator/flammables. Keep containers tightly closed. Do not expose to air. Store under an inert atmosphere.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Minimize dust generation and accumulation. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Avoid contact with skin and eyes. Avoid ingestion and inhalation. Handle under an inert atmosphere. Store protected from air.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use. Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Isolate area and deny entry. Place under an inert atmosphere. Do not use combustible materials such as paper towels to clean up spill.
Disposal code
15
Stability
Stable under normal temperatures and pressures. Powder or liquid is pyrophoric.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, oxides of cobalt.

Fire.
Flash Point,°C
-12.8
Fire fighting
Small Fires: Dry chemical, carbon dioxide, sand, earth, water spray or regular foam. Large Fires: Water spray, fog or regular foam.
Fire potential
Flammable/combustible material. May be ignited by friction, heat, sparks or flames.
Hazards
When heated to decomposition, it emits carbon monoxide. Slowly attacked by hydrochloric acid and sulfuric acid, more rapidly by nitric acid and bromine. Unstable, decomposes on exposure to air.
Combustion products
When heated to decompose it emits carbon monoxide.
Health
2
 
Flammability
2
 
 
Reactivity
2
 

Health.
Exposure limit(s)
TLV: ppm; 0.1 mg/m3 as Co (ACGIH 1993-1994). NIOSH REL: TWA 0.1 mg/m3
Carcinogin
I-2B
Poison_Class
2
Exposure effects
May cause kidney injury. Cobalt compounds may cause cancer based upon animal studies.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed.
   Inhalation
Inhalation of fumes may cause metal fume fever, which is characterized by flu-like symptoms with metallic taste, fever, chills, cough, weakness, chest pain, muscle pain and increased white blood cell count. May cause respiratory tract irritation. In rare instances, exposure may cause sensitization, resulting in inflammation of the mucous membranes and in eczematous eruptions.
   Skin
May cause skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
1325
Response guide
Hazard class
4.1
Packing Group
II; III
 
USCG CHRIS Code
COC
 
HS Code
2931 00 95