1317-40-4 62975-02-4 AI3-51685 C.I. 77450 C.I. Pigment Blue 34 CI 77450 CI Pigment Blue 34 CUPRIC SULFIDE Copper Blue Copper monosulfide Copper sulfide (CuS) Copper sulphide Copper(2+) sulfide Copper(II) sulfide EINECS 215-271-2 HSDB 5805 Horace Vernet's Blue Monocopper monosulfide NSC 47694 Natural covellite Oil Blue