Description

5-Amino-1-Hydroxy-2-Naphthalenesulfonic Acid is a key naphthalene-based intermediate with significant commercial value in the synthesis of dyes and pigments. Its structure, featuring both amino and sulfonic acid groups, makes it a versatile building block for creating colorants with specific properties like brightness and wash-fastness. This compound is essential for manufacturers in the dye, textile, and specialty chemical industries seeking reliable, high-purity intermediates for their production processes.

Application

• Primary intermediate in the synthesis of azo dyes and pigments for textiles, leather, and paper.
• Key precursor for manufacturing acid dyes, which are used for coloring nylon, wool, and silk.
• Used in the production of reactive dyes for cotton and other cellulosic fibers.
• Building block for food colorants (FD&C dyes) and lake pigments after further chemical modification.
• Intermediate in organic synthesis for pharmaceuticals and agrochemicals.
• Used in research and development of new functional dyes and optical materials.

Basic Information

Product Name	5-Amino-1-Hydroxy-2-Naphthalenesulfonic Acid
CAS No.	58596-07-9
Molecular Formula	C₁₀H₉NO₄S
Molecular Weight	239.25 g/mol
Synonyms	5-Amino-1-naphthol-2-sulfonic Acid; 1-Hydroxy-5-amino-2-naphthalenesulfonic Acid; 5-Amino-1-hydroxy-2-naphthalene sulfonic acid; 1-Hydroxy-5-aminonaphthalene-2-sulfonic Acid; 5-Amino-1-naphthol-2-sulphonic Acid; 1-Naphthol-5-amino-2-sulfonic Acid; 5-Amino-1-naphthol-2-sulphonic acid; 5-Amino-1-naphthol-2-sulfonate
EINECS	Contact for details

Quality Control

Our 5-Amino-1-Hydroxy-2-Naphthalenesulfonic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistent purity and performance for demanding industrial applications. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and physical characteristics are available upon request to support your quality assurance and regulatory needs.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Off-white to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
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.