Natural iron oxide

CAS Registry Number®

1345-27-3
No image available.

CAS Name

Natural iron oxide

Molecular Formula

Unspecified

Cite this Page

Natural iron oxide.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=1345-27-3 (retrieved 2025-08-07) (CAS RN: 1345-27-3).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Other Names and Identifiers

Other Names for this Substance

  • C.I. Pigment Brown 7
  • Burnt umber
  • Natural iron oxide
  • Pigment Brown 7
  • Cosmetic Burnt Umber

Deleted or Replaced CAS Registry Numbers

12000-62-3, 12001-02-4

CAS INSIGHTSTM
Biotite (black mica) mineral on black background.