Description

1-Hydroxy-4-Sulfo-2-Naphthoic Acid is a versatile naphthalene derivative that serves as a key intermediate in the synthesis of dyes, pigments, and specialty chemicals. Its bifunctional structure, featuring both a carboxylic acid and a sulfonic acid group, makes it a valuable building block for creating compounds with specific solubility and chromophoric properties. This product is essential for manufacturers in the dye and pigment industry, as well as for research and development in fine chemical synthesis.

Application

• Dye and Pigment Intermediate: A crucial precursor for the synthesis of azo dyes, acid dyes, and reactive dyes, imparting color fastness and solubility.
• Coupling Agent: Used in diazo coupling reactions to produce high-value, complex organic colorants.
• Fine Chemical Synthesis: Serves as a multifunctional intermediate in the production of pharmaceuticals, agrochemicals, and photographic chemicals.
• Research & Development: Utilized in academic and industrial labs for developing new functional materials and organic compounds.
• Textile Industry: Integral to manufacturing dyes used for coloring natural and synthetic fibers.
• Analytical Reagent: Can be employed as a standard or reagent in specific chemical analyses.

Basic Information

Item	Details
Product Name	1-Hydroxy-4-Sulfo-2-Naphthoic Acid
CAS No.	66695-90-7
Molecular Formula	C11H8O6S
Molecular Weight	268.24 g/mol
Synonyms	4-Sulfo-1-hydroxy-2-naphthoic acid; 1-Hydroxy-2-naphthoic acid-4-sulfonic acid; 1-Naphthol-4-sulfonic acid-2-carboxylic acid; 2-Carboxy-1-naphthol-4-sulfonic acid; 1,4-Dihydroxy-3-naphthalenesulfonic acid (tautomer); 4-Hydroxy-3-sulfo-2-naphthoic acid; NSC 403119; 1-Hydroxy-4-sulfo-2-naphthalenecarboxylic acid
EINECS	Contact for details

Quality Control

Our 1-Hydroxy-4-Sulfo-2-Naphthoic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure high purity and consistent performance. We provide comprehensive Certificates of Analysis (COA) detailing purity, identity, and impurity profiles. Our quality commitment ensures the product meets the specifications required for your industrial or research applications.

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). Keep away from strong bases and oxidizing agents. Due to its acidic nature, ensure the storage area is equipped with appropriate chemical handling safeguards.

Specification

Item	Specification
Appearance	Off-white to light yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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