CoO
74.933 g/mol
Dye & PigmentWarning
Cobalt(II) oxide
CAS1307-96-6EC215-154-6
Category
Dye & Pigment
Compound Class
Inorganic Salt
Primary Use
Ceramics pigment and enamel colorant
Cobalt(II) oxide is an inorganic compound that is typically an olive-green or gray solid. It is extensively used in the ceramics industry as an additive to produce blue-colored glazes and enamels, and also serves as a precursor for manufacturing cobalt(II) salts.
Blue pigment for ceramics glazes and enamelsPrecursor for cobalt(II) salt production
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
Relevant lists:California Proposition 65
CAS 1307-96-6
Related Compounds
ReferenceSame Category
Dichromium trioxide
CAS1308-38-9
Pigment for paints and polymers
ReferenceSame Category
Iron(III) oxide
CAS1309-37-1
Pigment in paints and coatings
ReferenceSame Category
2-Amino-4,8-naphthalenedisulfonic acid
CAS131-27-1
Dye intermediate
ReferenceSame Category
Anatase
CAS1317-70-0
White pigment in paints and coatings
Safety Reference
Warning
H351Suspected of causing cancer
H301Toxic if swallowed
H317May cause an allergic skin reaction
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
H370Causes damage to organs
H371May cause damage to organs
H372Causes damage to organs through prolonged or repeated exposure
H330Fatal if inhaled
H410Very toxic to aquatic life with long lasting effects
H400Very toxic to aquatic life
Regulatory Compliance1
- California Proposition 65USRegulation
Customs Tariff Classification
The international HS code for Cobalt(II) oxide (CAS 1307-96-6) is 2822.00, 3206.49.
HS code (international, 6-digit)
2822.00, 3206.49
EU CN code (8-digit)
2822 00 00, 3206 49 70
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
oxocobalt
InChIKey
IVMYJDGYRUAWML-UHFFFAOYSA-N
SMILES
O=[Co]
Synonyms (18)
- COBALTOUS MONOXIDE
- COBALTOUS OXIDE
- Cobalt monooxide
- Cobalt monoxide
- Cobalt oxide (CoO)
- Cobalt(II) oxide
- Cobalt(II) oxide, -325 mesh
- Cobalto-cobaltic oxide
- Cobalto-cobaltic tetroxide
- Cobaltosic oxide
- Cobaltous(II) oxide
- Monocobalt oxide
- Prepared cobalt oxide
- TRICOBALT TETROXIDE
- oxocobalt