Description

Iron Oxide Brown CAS NO 1332-59-8 is a high-purity, synthetic inorganic pigment known for its excellent color stability, chemical resistance, and non-toxic properties. It serves as a critical coloring agent across numerous industries, providing consistent, durable, and cost-effective pigmentation. This product is essential for manufacturers in the construction, coatings, plastics, and ceramics sectors seeking reliable and high-performance brown pigments for their formulations.

Application

• Construction Materials: Pigment for concrete, paving stones, roofing tiles, and mortar to provide durable, weather-resistant coloration.
• Coatings and Paints: Used in industrial paints, marine coatings, and architectural finishes for its UV stability and opacity.
• Plastics and Polymers: Coloring agent for masterbatches, engineering plastics, and PVC products.
• Ceramics and Glass: Provides stable coloring in ceramic glazes, porcelain, and specialty glass.
• Paper and Inks: Pigment for specialty papers, packaging, and printing inks.
• Cosmetics: Used in color cosmetics such as eyeshadows and blushes, where approved for cosmetic use.
• Leather and Textile Finishing: Provides color in dyes and finishes for leather goods and textiles.

Basic Information

Product Name	Iron Oxide Brown
CAS No.	1332-59-8
Molecular Formula	Fe₂O₃·H₂O (Blend of Fe₂O₃ and FeOOH)
Molecular Weight	N/A (Complex mixture)
Synonyms	CI 77491; CI 77492; CI 77499; Pigment Brown 6; Pigment Brown 7; Synthetic Brown Iron Oxide; Ferric Oxide Hydrate; Iron(III) Oxide Hydroxide; Burnt Sienna; Umber
EINECS	215-570-8

Quality Control

Our Iron Oxide Brown is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. We adhere to relevant industry standards, including ISO 9001, and our products can be supplied to meet specifications for construction, coatings, and plastics applications. A comprehensive Certificate of Analysis (COA) detailing purity, heavy metal content, and physical properties is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials such as strong acids and strong oxidizing agents. Under these conditions, the product has excellent shelf stability.

Specification

Item	Specification
Appearance	Brown Powder
Identification (IR)	Conforms
Iron Oxide (Fe₂O₃) Content	≥ 96.0 %
Moisture (Loss on Drying)	≤ 1.0 %
Water Soluble Matter	≤ 0.5 %
pH (10% Slurry)	5.0 - 7.0
Oil Absorption	15 - 25 g/100g
Particle Size (325 Mesh Residue)	≤ 0.5 %
Specific Gravity	~4.2 g/cm³
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm
Lead (Pb)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.