ANTHRAQUINONE

Anthraquinone – CAS No. 84-65-1

Anthraquinone, with the chemical formula C₁₄H₈O₂ and CAS Number 84-65-1, is a polycyclic aromatic hydrocarbon serving as a key intermediate in the production of dyes, pigments, and pulp processing aids. This yellow crystalline solid exhibits low water solubility (0.03 g/L at 20°C) and high thermal stability (melting point 284°C), making it ideal for high-temperature reactions and as a catalyst in alkaline pulping without significant degradation. With a purity ≥98%, Anthraquinone promotes lignin removal in paper manufacturing, enhances fiber strength, and acts as a precursor for anthraquinone dyes renowned for their vibrant colors and lightfastness. Its inert nature under neutral conditions supports sustainable processes, reducing chemical consumption while delivering consistent performance in industrial-scale operations.

Applications

Dyes and Pigments Industry

• Anthraquinone Dyes: Primary precursor for vat and disperse dyes at 50-70% loadings, providing brilliant blues and reds for textiles with superior washfastness.
• Pigment Synthesis: Oxidized to form quinacridone pigments for automotive coatings, achieving high chroma and durability.

Paper and Pulp Processing

• Pulping Catalyst: Added at 0.1-0.3% in alkaline digestion to accelerate delignification, increasing yield and reducing cooking time by 10-20%.
• Bleaching Aid: Enhances peroxide efficiency in ECF bleaching for brighter pulp without fiber weakening.

Pharmaceuticals and Fine Chemicals

• Drug Intermediates: Building block for anthracycline antibiotics via substitution, supporting anticancer therapies.
• Agrochemicals: Precursor for herbicides through sulfonation, improving weed control efficacy.

Why Choose Our Anthraquinone?

Our Anthraquinone is purified to <0.1% moisture and trace metals <5 ppm, ensuring odorless crystals and optimal catalytic activity without side reactions. Pulp mills report 15% higher fiber strength and reduced chemical usage. Available in powder and granular forms for dyes and pulping, packaged in 25kg bags or 500kg drums, with technical/pharma grades and certifications like ISO 9001 and REACH for reliable supply.

Frequently Asked Questions (FAQs)

What is Anthraquinone?

Anthraquinone is a polycyclic quinone with formula C₁₄H₈O₂ and CAS 84-65-1, used as a dye intermediate and pulping catalyst. It’s a yellow crystalline solid that cycles between oxidized and reduced forms for selective reactions.

How is Anthraquinone used in paper pulping?

Incorporate 0.05-0.2% into white liquor for kraft cooking; it acts as an electron shuttle, accelerating lignin dissolution at 160-170°C for higher yields.

Is Anthraquinone safe for industrial applications?

Yes, with proper ventilation—it’s a skin irritant but low acute toxicity (LD50 >5000 mg/kg oral); handle as a combustible solid per OSHA guidelines.

What is the shelf life of Anthraquinone?

Stored dry and cool (<30°C), it remains stable for 2-3 years, with no sublimation or discoloration under inert conditions.

Can Anthraquinone be used in dye synthesis?

Anthraquinone is ideal for sulfonation to alizarin derivatives, yielding acid-resistant dyes; it’s stable in sulfuric acid media for batch production.

Does Anthraquinone dissolve in water-based systems?

Limited solubility requires organic co-solvents like acetone; for pulping, it’s used in alkaline solutions where it partially dissolves.

What packaging options are available for Anthraquinone?

We offer 25kg fiber drums, 50kg bags, and 500kg supersacks, all lined for dust control and compliant with UN 3077 for environmental hazards.

For synthesis protocols, purity analysis, or volume pricing, our chemical specialists are ready to assist.

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