Description

1-Naphthol-3,6-Disulfonic Acid is a key aromatic sulfonic acid derivative, serving as a versatile intermediate in the synthesis of high-value 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 essential for manufacturers in the dye, textile, and specialty chemical industries seeking reliable intermediates for complex organic synthesis.

Application

• Dye and Pigment Intermediate: Primary use as a key building block for synthesizing azo dyes, acid dyes, and reactive dyes, particularly for textiles and leather.
• Chemical Synthesis: Acts as a sulfonating agent and intermediate in the production of more complex organic molecules and fine chemicals.
• Research & Development: Used in laboratory settings for developing new chromophores and studying sulfonation reactions.
• Specialty Chemicals: Potential applications in the formulation of optical brighteners, corrosion inhibitors, and other functional additives.

Basic Information

Product Name	1-Naphthol-3,6-Disulfonic Acid
CAS No.	578-85-8
Molecular Formula	C₁₀H₈O₇S₂
Molecular Weight	304.30 g/mol
Synonyms	6-Hydroxy-1,3-naphthalenedisulfonic Acid; 1-Naphthol-3,6-disulfonic Acid; 3,6-Dihydroxynaphthalene-1-sulfonic Acid (tautomer); 6-Hydroxynaphthalene-1,3-disulfonic Acid; NSC 40326; Naphthol Disulfonic Acid; 1,3-Naphthalenedisulfonic Acid, 6-hydroxy-; 6-Hydroxy-1,3-naphthalenedisulfonate
EINECS	209-432-2

Quality Control

Our 1-Naphthol-3,6-Disulfonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. A Certificate of Analysis (COA) detailing specifications such as assay, sulfonic acid content, and impurity profile is provided with every shipment to guarantee it meets your technical 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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Off-white to light brown powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfonic Acid Content (Titration)	Conforms
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%

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