Description

1-Amino-8-Hydroxynaphthalene-3,6-Disulphonic Acid is a key aromatic sulfonic acid derivative, serving as a critical intermediate in the synthesis of high-value dyes and pigments. Its molecular structure provides the necessary chromophore and auxochrome groups for producing vibrant, colorfast azo dyes. This compound is essential for manufacturers in the textile, leather, and specialty chemical industries seeking to develop specific shades with excellent light and wash fastness properties.

Application

• Primary Intermediate for Azo Dyes: Acts as a crucial diazo component in the production of acid dyes, direct dyes, and reactive dyes for textiles like wool, silk, and nylon.
• Pigment Manufacturing: Used in the synthesis of organic pigments for inks, plastics, and coatings, providing bright and stable colors.
• Leather Dyeing: Employed in the formulation of dyes for leather finishing, offering good penetration and color uniformity.
• Research & Development: Serves as a building block in chemical research for developing new chromogenic compounds and functional materials.
• Specialty Chemical Synthesis: Utilized as a precursor for more complex sulfonated compounds used in various industrial processes.

Basic Information

Product Name	1-Amino-8-Hydroxynaphthalene-3,6-Disulphonic Acid
CAS No.	90-20-0
Molecular Formula	C₁₀H₉NO₇S₂
Molecular Weight	319.31 g/mol
Synonyms	H-Acid; 1-Amino-8-naphthol-3,6-disulfonic acid; 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid; 8-Amino-1-naphthol-3,6-disulfonic acid; 1,8-Aminohydroxynaphthalene-3,6-disulfonic acid; Amino C Acid; Chicago Acid; Pontacyl Grey BG Base
EINECS	201-975-3

Quality Control

Our 1-Amino-8-Hydroxynaphthalene-3,6-Disulphonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee consistency and 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 room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	Off-white to grey powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (KF)	≤ 5.0%
Sulfated Ash	≤ 0.5%
Solubility	Soluble in alkaline aqueous solutions

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