Cobaltous oxide

  • Cobalt black
  • Cobalt(II) oxide
  • Cobalt monooxide
  • Cobalt monoxide
  • Cobalt(2+) oxide
  • Cobalt oxide
Formula
CoO
Structure
Description
Olive green, red, gray or black, odorless powder.
Uses
In pigments for ceramics, glass coloring & decolorization, prepn of cobalt metal catalysts, oxidation catalyst for drying oils, fast drying paints & varnishes, cobalt powder for binder in sintered tungsten carbide, in semiconductors.

Registry Numbers and Inventories.
CAS
1307-96-6
EC (EINECS/ELINCS)
215-154-6
EC Index Number
027-002-00-4
EC Class
Harmful; Sensitising; Dangerous for the Environment
RTECS
GG2800000
RTECS class
Tumorigen
Merck
12,2507
Beilstein/Gmelin
13679 (G)
Swiss Giftliste 1
G-4781
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
CoO
Formula mass
74.93
Melting point, °C
1933
Density
6.1 g/cm3 (20 C)
Solubility in water
practically insoluble

Hazards and Protection.
Storage
Kepp container tightly closed. Suitable for any general chemical storage area.
Handling
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.
Protection
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
None is normally required. If required, use a NIOSH/MSHA approved SCBA.
Small spills/leaks
While wearing protective clothing, carefully sweep up and remove.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
None reported.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.
Fire potential
Specially prepared (the form prepared by reducing the oxides in hydrogen) very fine cobalt dust will catch fire at room temperature in air. Cobalt metal fume and dust

Health.
Exposure limit(s)
IDHL: 20 mg/m3
Carcinogin
G-A3, I-2B, CP65
Poison_Class
4
Exposure effects
   Ingestion
Nausea, vomiting, headaches, dizziness, irritation.
   Inhalation
Irritation of upper respiratory tract.
   Skin
Irritation. Prolonged contact can cause sensitization.
   Eyes
Irritation.

First aid
 
   Ingestion
Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
   Inhalation
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.