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Substance Name: CI 77346
RN: 1345-16-0


  • TSCA Definition 2017: An inorganic pigment that is the reaction product of high temperature calcination in which cobalt (II) oxide and aluminum 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 MgO, ZnO, Li2O, or TiO2.

Molecular Formula

  • Unspecified
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Names and Synonyms

Name of Substance

  • CI 77346
  • Cobalt blue
  • Pigment blue 28


  • Cobalt aluminate blue spinel
  • Cobalt aluminate spinel
  • Cobalt blue
  • EC 310-193-6
  • EINECS 310-193-6

Systematic Names

  • C.I. Pigment Blue 28
  • Cobalt aluminate blue spinel

Registry Numbers

CAS Registry Number

  • 1345-16-0

Other Registry Numbers

  • 1219711-24-6
  • 160936-12-9
  • 68186-86-7

System Generated Number

  • 0001345160