Description

1-Naphthol-3,6-Disulfonic Acid, Disodium Salt Hydrate, Tech. is a technical-grade, water-soluble naphthalene derivative primarily used as a key synthetic intermediate. Its value lies in providing the functionalized aromatic backbone necessary for constructing more complex molecules, particularly dyes and pigments. This product is essential for manufacturers in the colorant industry and for chemical synthesis requiring a sulfonated naphthol precursor.

Application

• Dye and Pigment Intermediate: A crucial building block in the synthesis of azo dyes, acid dyes, and reactive dyes, imparting color and solubility properties.
• Chemical Synthesis: Serves as a versatile starting material or coupling component for producing specialty chemicals and fine chemicals.
• Research & Development: Used in laboratory settings for developing new chromophores, fluorescent markers, or functional materials.
• Textile Industry: Indirect application through its use in manufacturing dyes for coloring natural and synthetic fibers.
• Paper Coloring: Employed in the production of dyes used for tinting paper products.
• Leather Processing: Used in the synthesis of dyes for leather staining and finishing.

Basic Information

Product Name	1-Naphthol-3,6-Disulfonic Acid, Disodium Salt Hydrate, Tech.
CAS No.	330581-20-9
Molecular Formula	C₁₀H₆Na₂O₇S₂·xH₂O
Molecular Weight	348.24 g/mol (anhydrous basis)
Synonyms	Disodium 1-Naphthol-3,6-disulfonate Hydrate; 3,6-Dihydroxy-1-naphthalenesulfonic Acid Disodium Salt; 1-Naphthol-3,6-disulfonic Acid Sodium Salt; 8-Hydroxynaphthalene-1,6-disulfonic Acid Disodium Salt; Acid Red 1 Intermediate; Naphthol AS Disulfonic Acid Salt; 1,6-Cleve's Acid Disodium Salt (hydroxy derivative); 3,6-Disulfo-1-naphthol Disodium Salt
EINECS	Contact for details

Quality Control

Our technical-grade 1-Naphthol-3,6-Disulfonic Acid, Disodium Salt Hydrate is produced under a strict quality management system. Every batch undergoes analytical testing to ensure consistent composition and performance for its intended industrial applications. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Off-white to beige powder or crystals
Identification (IR)	Conforms
Assay (HPLC)	≥ 85% (on anhydrous basis)
Water Content (KF)	≤ 15.0%
Sulfate Ash	Contact for details
pH (1% Solution)	Contact for details

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