CI 77499- ▸ Pigment: red colorant for paints, ceramics, and construction
- ▸ Polishing abrasive: jeweler's rouge for glass and metals
- ▸ Catalyst: iron-oxide catalyst in chemical processing
- ▸ Magnetic media: component in magnetic materials
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Red iron oxide (CAS 1309-37-1) is iron(III) oxide, Fe2O3 (Colour Index 77491). It is used as a pigment for paints, paper, ceramics, and construction, as a polishing abrasive (jeweler's rouge), and as a catalyst.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 215-168-2
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Solutions Using This Product
Process-solution guides on this site that specify this chemistry:
- Pigments & Dispersants for Uniform Color (Beauty & Personal Care)
- Antioxidants & Pigments Against Shade Drift (Beauty & Personal Care)
Frequently Asked Questions
What is red iron oxide used for?
Red iron oxide (CAS 1309-37-1) is iron(III) oxide, Fe2O3 (Colour Index 77491). It is used as a red pigment for paints, paper, ceramics, and construction, as a polishing abrasive (jeweler's rouge), as a catalyst, and as a component in magnetic materials.
Is red iron oxide a dye or a pigment?
It is a pigment, not a dye. Pigments such as Fe2O3 (CI 77491) are insoluble particles that color by dispersion, distinguishing it from soluble synthetic dyes like FD&C Red 40.
Is red iron oxide natural or synthetic?
Iron(III) oxide occurs naturally as the mineral hematite but is also produced synthetically for high-purity, consistent pigment grades. The High Purity AP grade is a manufactured product; consult the CoA for purity and particle data.
What is the chemical formula and Colour Index for red iron oxide?
The formula is Fe2O3 (iron(III) oxide), with Colour Index Pigment Red designation CI 77491 and CAS 1309-37-1. These identifiers appear on the CoA for specification matching.
Is red iron oxide available in bulk and how is it priced?
RawSource supplies high-purity red iron oxide in bulk to manufacturers. Pricing depends on grade, purity, and order volume, so request a bulk quote with your specification along with a CoA and SDS.
What is the REACH and TSCA regulatory status of Iron Oxide Red (Fe2O3, CI 77491)?
Iron Oxide Red (Fe2O3, CI 77491) (CAS 1309-37-1) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 215-168-2).