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Substance Name: C.I. Pigment Black 27
RN: 68186-97-0


  • TSCA Definition 2017: An inorganic pigment that is the reaction product of high temperature calcination in which iron (II) oxide, cobalt (II) oxide, chromium (III), and iron (III) oxide in varying amounts are homogeneously and ionically interdiffused to form a crystalline matrix of spinel. Its composition may include any one or a combination of the modifiers Al2O3, B2O3, CuO, MnO, NiO, or SiO2. This substance is identified in the COLOUR INDEX by Colour Index Constitution Number, C.I. 77502.

Molecular Formula

  • Unspecified
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Links to Resources

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Names and Synonyms


  • EC 269-060-5
  • EINECS 269-060-5
  • Iron cobalt chomite black spinel
  • Iron cobalt chromite Black spinel

Systematic Names

  • C.I. Pigment Black 27
  • Iron cobalt chromite Black spinel

Registry Numbers

CAS Registry Number

  • 68186-97-0

Other Registry Numbers

  • 68477-07-6
  • 68608-10-6
  • 95046-45-0

System Generated Number

  • 0068186970