Description

Iron (III) Oxide Monohydrate, Yellow is a hydrated form of ferric oxide, a high-purity inorganic pigment and chemical intermediate. This compound is valued for its consistent yellow hue, chemical stability, and utility in specialized manufacturing processes. It serves as a critical raw material for industries requiring precise coloration, catalysis, or surface treatment, including pigments, construction materials, and advanced ceramics.

Application

• Pigments and Colorants: Primary use as a yellow inorganic pigment in paints, coatings, plastics, and construction materials like concrete and mortar.
• Construction Industry: Used for coloring cement, paving stones, roofing tiles, and other architectural elements.
• Ceramics and Glass: Acts as a coloring agent in the production of ceramic glazes, enamels, and specialty glass.
• Polishing Compounds: A fine abrasive component in polishing formulations for glass, metals, and precision optics.
• Catalyst and Chemical Synthesis: Serves as a precursor or catalyst in various chemical reactions and material synthesis processes.
• Cosmetics (where approved): Used as a color additive in certain cosmetic products, subject to regional regulatory compliance.

Basic Information

Product Name	Iron (III) Oxide Monohydrate, Yellow
CAS No.	12259-21-1
Molecular Formula	Fe2O3·H2O / FeO(OH)
Molecular Weight	88.85 g/mol (for FeO(OH))
Synonyms	Yellow Iron Oxide; Ferric Oxide Monohydrate, Yellow; Goethite; Iron(III) Oxide Hydroxide; Iron Oxide Yellow; CI 77492; Pigment Yellow 42; Synthetic Yellow Iron Oxide; Hydrated Ferric Oxide
EINECS	235-442-5

Quality Control

Our Iron (III) Oxide Monohydrate, Yellow is manufactured under a stringent quality management system. Each batch is tested to ensure it meets precise specifications for color value, chemical purity, and physical properties relevant to its application grade. Certificates of Analysis (COA) documenting parameters such as assay, heavy metal content, and sieve analysis are available upon request. We adhere to relevant industry standards, including those for pigments and colorants.

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. The container must be kept tightly closed to minimize moisture absorption and contamination.

Specification

Item	Specification
Appearance	Yellow powder
Identification (IR)	Conforms
Assay (as Fe2O3)	≥ 86.0 %
Loss on Drying	≤ 14.0 %
Water-soluble matter	≤ 1.0 %
Arsenic (As)	≤ 3 mg/kg
Lead (Pb)	≤ 20 mg/kg
Sieve Residue (45μm)	≤ 0.5 %
pH (10% suspension)	3.5 - 7.0
Oil Absorption	Contact for details
Color Strength	Contact for details

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