Description

2-Naphthol-6,8-Disulfonic Acid is a key aromatic sulfonic acid derivative, primarily valued as a versatile intermediate in the synthesis of dyes and pigments. Its disulfonic acid groups make it highly reactive and water-soluble, enabling the creation of vivid and stable colorants. This compound is essential for manufacturers in the dye, textile, and specialty chemical industries seeking to produce high-performance azo dyes and other functional organic molecules.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial coupling component in the production of acid dyes and direct dyes for textiles, leather, and paper.
• Pigment Manufacturing: Used in the synthesis of organic pigments that require high lightfastness and thermal stability.
• Chemical Synthesis: Acts as a building block for more complex sulfonated compounds used in specialty chemicals.
• Research & Development: Employed in laboratories for developing new dye structures and studying sulfonation chemistry.

Basic Information

Product Name	2-Naphthol-6,8-Disulfonic Acid
CAS No.	118-32-1
Molecular Formula	C₁₀H₈O₇S₂
Molecular Weight	304.30 g/mol
Synonyms	6,8-Dihydroxy-1,3-naphthalenedisulfonic Acid; 2-Hydroxy-6,8-naphthalenedisulfonic Acid; 6,8-Disulfo-2-naphthol; NSC 40326; 2-Naphthol-6,8-disulfonic acid potassium salt (common salt form); Acid Yellow 1 intermediate; Dihydroxynaphthalenedisulfonic Acid
EINECS	204-252-5

Quality Control

Our production of 2-Naphthol-6,8-Disulfonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. Each lot is analyzed against established specifications, including assay, impurity profile, and physical characteristics. A comprehensive Certificate of Analysis (COA) documenting these results is provided with every shipment to support your quality assurance processes.

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 strong oxidizing agents and strong bases.

Specification

Item	Specification
Appearance	Off-white to light brown powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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