CATHAY INDUSTRIES > Products > Iron Oxides > CATHAYCOAT™ Brown BRS81


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Synthetic Brown Iron Oxides from Cathay Industries are high-quality inorganic pigments suitable for wide range of demanding colorant applications. Typical applications include architectural paints, industrial coatings, product finishes, wood stains, plastics, rubber, ceramics, inks, paper, concrete, stucco, cement and mortar.

The excellent dispersion characteristics and high tint strength of our Synthetic Brown Iron Oxides make them particularly useful in many of today’s high performance coatings. These cost-effective pigments eliminate the need for more expensive dispersant additives and pre-dispersed liquid pigment concentrates.

BRS81 is made by blending of Iron Oxide Red, Yellow and Black with excellent weathering and light fastness. It is produced with strict quality tolerances and reliable performance, which offer outstanding opacity, acid and alkali resistance, chemical resistance, exterior durability and compatibility.

As all CATHAYCOATTM “BRS” grade Iron Oxide Brown, BRS81 is suitable for applications where high-energy media filled dispersion equipment such as sandmills or horizontal mills are used or high Hegman levels of dispersion are not required.

Properties Description
Appearance Brown Powder
Chemical Composition Fe2O3, Fe2O3.H2O, Fe3O4
Particle Shape Irregular
Pigment Index Red 101, Yellow 42, Black 11
Color Index 77491, 77492, 77499
CAS No. 1309-37-1, 51274-00-1, 1317-61-9





* Tint Tone: reduction with TiO2 1:4.
**The color shades presented here are as accurate as monitor settings allow.**
**They may be different from shades in actual application and are for reference only.**


Standard Grade
Coating, Leather Coatings, Paints & Colorants, Paper, Plastic, Masterbatches, Car Refinish, Printing Inks, Others