Description

4-Amino-5-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble aromatic intermediate of significant commercial importance. This compound serves as a critical building block in the synthesis of complex dyes and pigments, valued for its ability to introduce specific functional groups and chromophoric properties. It is primarily required by manufacturers in the dyestuff, textile, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: A key coupling component for synthesizing acid, direct, and reactive dyes, particularly for textiles like wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of high-grade organic pigments for inks, coatings, and plastics.
• Specialty Chemical Synthesis: Acts as a precursor for more complex chemical structures in pharmaceutical and agrochemical research.
• Laboratory Reagent: Employed in research and development for studying sulfonated naphthalene chemistry and dye formation mechanisms.

Basic Information

Product Name	4-Amino-5-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	17265-34-8
Molecular Formula	C10H7NNa2O8S2
Molecular Weight	387.27 g/mol
Synonyms	4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid disodium salt; 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, disodium salt; 5-Amino-4-hydroxynaphthalene-2,7-disulfonic acid sodium salt; 1,6-Cleve's acid, 7-hydroxy; H-Acid precursor; 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid disodium salt
EINECS	241-300-6

Quality Control

Our 4-Amino-5-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt is manufactured under a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity and performance, meeting the exacting standards required for industrial synthesis. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). The product is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 30.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, complete solution

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