1,4-Dihydroxyanthraquinone

CAS NO. 81-64-1

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Product Description

Product Name	1,4-Dihydroxyanthraquinone (Quinizarin) (Key Intermediate for Disperse Dyes / Solvent Orange 86)
CAS NO.	81-64-1
Formula & Weight	C14H8O4 (MW: 240.21 g/mol)
Chemical Structure
Technical Specifications	Appearance: Orange to reddish-brown crystalline powder Purity (HPLC): ≥ 99.0% (High Purity Grade) Melting Point: 194°C - 197°C Moisture: ≤ 0.5% Ash Content: ≤ 0.2% Toluene Insolubles: ≤ 0.2% (Critical for Dye Yield)
Industrial Applications	Quinizarin is the backbone intermediate for high-value anthraquinone dyes: Dye Synthesis: Primary precursor for Disperse Violet 26/28, Solvent Blue 35/36, and Acid Dyes. Oil Marking: Used as "Solvent Orange 86" for fiscal marking of heating oil and fuels due to its distinct spectral signature. Pigments: Intermediate for synthesizing lake pigments used in plastics and coatings.
Packaging & Certifications	Packaging: 25kg Kraft Paper Bag / Fiber Drum with liner. Supply: Stable stock for bulk export; ISO 9001 certified production.

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Manufacturer Direct for Dye Intermediates

We control Toluene Insoluble substances ≤ 0.2% to ensure maximum yield in your dye synthesis.
Contact June Lu (Product Manager) for COA and samples.