Description

2-Amino-5-Hydroxynaphthalene-1,7-Disulfonic Acid is a key aromatic sulfonic acid derivative and a vital intermediate in the synthesis of complex organic dyes and pigments. Its bifunctional structure, featuring both amino and hydroxyl groups on a naphthalene disulfonic acid backbone, makes it an essential building block for creating molecules with specific color and binding properties. This compound is primarily required by manufacturers in the dyestuff, textile, and specialty chemical industries for producing high-value azo and reactive dyes.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial diazo component or coupling agent in the manufacture of acid dyes, direct dyes, and reactive dyes for textiles like wool, silk, and nylon.
• Pigment Synthesis: Used in the production of organic pigments for inks, paints, plastics, and coatings, where lightfastness and color strength are critical.
• Specialty Chemical Manufacturing: Acts as a key precursor for synthesizing more complex chemical entities used in research and high-performance material applications.
• Laboratory Research & Development: Employed as a standard or reagent in chemical research for developing new chromophores and functional materials.

Basic Information

Product Name	2-Amino-5-Hydroxynaphthalene-1,7-Disulfonic Acid
CAS No.	6535-70-2
Molecular Formula	C₁₀H₉NO₇S₂
Molecular Weight	319.31 g/mol
Synonyms	5-Hydroxy-2-aminonaphthalene-1,7-disulfonic acid; 2-Amino-5-naphthol-1,7-disulfonic acid; 1,7-Cleve's acid; 6-Amino-4-hydroxynaphthalene-2-sulfonic acid; 7-Amino-1-hydroxynaphthalene-3-sulfonic acid; 5-Hydroxy-1,7-Cleve's acid; 2-Amino-5-hydroxy-1,7-naphthalenedisulfonic acid
EINECS	229-458-5

Quality Control

Our 2-Amino-5-Hydroxynaphthalene-1,7-Disulfonic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. We provide comprehensive Certificates of Analysis (COA) with key parameters including purity, identity, and impurity profiles to guarantee batch-to-batch consistency and reliability for your industrial processes.

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); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Off-white to light gray powder or crystals
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.