Description

1-Naphthol-3,8-Disulfonic Acid is a key aromatic sulfonic acid derivative used as a versatile intermediate in the synthesis of dyes and pigments. Its disulfonic acid groups provide excellent water solubility and reactivity, making it crucial for creating vivid and stable colorants. This compound is primarily sought by manufacturers in the dye, textile, and specialty chemical industries for producing high-performance azo dyes and other functional materials.

Application

• Primary Intermediate for Azo Dyes: Serves as a critical coupling component in the production of water-soluble azo dyes for textiles, leather, and paper.
• Pigment Manufacturing: Used in the synthesis of organic pigments requiring high tintorial strength and stability.
• Specialty Chemical Synthesis: Acts as a building block for creating more complex sulfonated aromatic compounds used in various industrial processes.
• Research & Development: Employed in chemical research for developing new dye structures and studying sulfonation reactions.

Basic Information

Item	Detail
Product Name	1-Naphthol-3,8-Disulfonic Acid
CAS No.	117-43-1
Molecular Formula	C10H8O7S2
Molecular Weight	304.30 g/mol
Synonyms	8-Hydroxy-1,6-naphthalenedisulfonic Acid; 1-Naphthol-3,8-disulfonic Acid; 3,8-Dihydroxy-1-naphthalenesulfonic Acid (tautomer); NSC 40326; 1,6-Naphthalenedisulfonic acid, 8-hydroxy-; 8-Hydroxynaphthalene-1,6-disulfonic Acid
EINECS	204-190-5

Quality Control

Our 1-Naphthol-3,8-Disulfonic Acid is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. A Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with every shipment to guarantee it meets your specific application requirements.

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). This product is hygroscopic (moisture-sensitive) and must be kept in a dry environment to prevent caking or decomposition.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
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.