Description

8-Amino-1-Naphthol-3,6-Disulfonic Acid Monosodium Salt n-Hydrate is a high-purity, water-soluble aromatic intermediate of significant commercial importance. Its molecular structure, featuring both amino and sulfonic acid groups, makes it a versatile precursor for the synthesis of dyes, pigments, and specialty chemicals. This product is essential for manufacturers in the colorant, pharmaceutical, and fine chemical industries seeking reliable and consistent raw materials for complex synthesis.

Application

• Dye and Pigment Intermediate: A key building block for the synthesis of acid dyes, reactive dyes, and azo pigments, particularly for textile and leather coloring.
• Pharmaceutical Synthesis: Used as a precursor in the manufacture of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Chemical Research & Development: Serves as a valuable reagent in organic synthesis for creating complex sulfonated aromatic compounds.
• Photographic Chemicals: Employed in the production of certain photographic developers and color couplers.
• Analytical Reagent: Can be used as a chelating agent or a chromogenic substrate in analytical chemistry applications.

Basic Information

Product Name	8-Amino-1-Naphthol-3,6-Disulfonic Acid Monosodium Salt n-Hydrate
CAS No.	343321-59-5
Molecular Formula	C10H8NNaO7S2 • nH2O
Molecular Weight	333.29 g/mol (Anhydrous basis)
Synonyms	8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt; 1-Naphthol-8-amino-3,6-disulfonic acid monosodium salt; H-Acid monosodium salt; 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid monosodium salt; 8-Amino-1-naphthol-3,6-disulfonate sodium salt; Sodium 8-amino-1-naphthol-3,6-disulfonate; 1-Amino-8-naphthol-3,6-disulfonic acid sodium salt (isomer); Acid Black 1 intermediate.
EINECS	Contact for details

Quality Control

Our 8-Amino-1-Naphthol-3,6-Disulfonic Acid Monosodium Salt n-Hydrate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for critical applications. Certificates of Analysis (COA) documenting purity, assay, and impurity profiles 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 area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Grayish to brown powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (on anhydrous basis)
Water Content (KF)	≤ 15.0% (n-Hydrate)
Related Substances (HPLC)	Total impurities ≤ 3.0%
Solubility	Soluble in water

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