Description

Iron Oxide Brown is a high-purity, inorganic pigment known for its excellent color stability and chemical inertness. This compound is essential for providing durable, non-fading brown coloration across a wide range of industrial and commercial products. It is a critical raw material for manufacturers in the construction, coatings, plastics, and ceramics industries seeking consistent, high-performance pigmentation.

Application

• Construction Materials: A primary pigment for coloring concrete, paving stones, roofing tiles, and mortar, providing UV-resistant and weatherproof coloration.
• Paints & Coatings: Used in industrial paints, marine coatings, and architectural finishes for its opacity, durability, and corrosion resistance.
• Plastics & Masterbatches: Imparts stable brown color to polyethylene (PE), polypropylene (PP), PVC, and other polymers during extrusion or molding.
• Ceramics & Glass: Acts as a colorant in glazes, ceramic bodies, and specialty glass applications.
• Paper & Inks: Employed in the manufacture of colored paper and specialty printing inks.
• Cosmetics (where compliant): Used in certain cosmetic formulations, such as soaps and pigments, subject to meeting specific purity and regulatory standards.

Basic Information

Product Name	Iron Oxide Brown
CAS No.	52357-70-7
Molecular Formula	Fe₂O₃·H₂O (Blend) / FeO(OH) (Component)
Molecular Weight	~177.71 (for FeO(OH))
Synonyms	CI 77492; CI Pigment Brown 6; CI Pigment Brown 7; Ferric Oxide Brown; Iron(III) Oxide Hydroxide; Goethite; Synthetic Brown Iron Oxide; Burnt Sienna; Raw Umber (synthetic analogues)
EINECS	257-849-5

Quality Control

Our Iron Oxide Brown is manufactured under a stringent quality management system. Each batch is tested to ensure it meets critical parameters for color strength, chemical composition, and physical properties. Certificates of Analysis (COA) are provided with every shipment, and we can support compliance with relevant standards such as ISO 1248, ASTM D50, and FDA 21 CFR for specific grades.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials such as strong acids and strong oxidizing agents. The product is stable under normal storage conditions.

Specification

Item	Specification
Appearance	Brown Powder
Identification (IR)	Conforms
Iron Content (as Fe₂O₃)	≥ 96.0 %
Moisture Content	≤ 1.0 %
Water Soluble Matter	≤ 0.5 %
pH (10% aqueous suspension)	5.0 - 7.0
Oil Absorption	15 - 25 g/100g
Particle Size (325 Mesh Residue)	≤ 0.5 %
Color Difference (δE)	≤ 0.5 (vs. Standard)

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