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Substance Name: C.I. Pigment Black 25
RN: 68186-89-0


  • TSCA Definition 2018: An inorganic pigment that is the reaction product of high temperature calcination in which cobalt (II) oxide and nickel (II) oxide in varying amounts are homogeneously and ionically interdiffused to form a crystalline matrix of periclase. Its composition may include any one or a combination of the modifiers Al2O3, Cr2O3, FeO, MnO, SiO2, TiO2, ZnO, or ZrO2. This substance is identified in the COLOUR INDEX by Colour Index Constitution Number, C.I. 77332.

Molecular Formula

  • Unspecified
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Names and Synonyms


  • Cobalt nickel gray periclase
  • Cobalt nickel grey periclase
  • EINECS 269-051-6

Systematic Name

  • C.I. Pigment Black 25

Registry Numbers

CAS Registry Number

  • 68186-89-0

System Generated Number

  • 0068186890