Description

1-Naphthol-4-Sulfonic Acid is a key sulfonated naphthalene derivative, serving as a versatile intermediate in the synthesis of dyes, pigments, and other fine chemicals. Its value lies in its ability to introduce both phenolic and sulfonic acid functional groups into target molecules, enhancing solubility and providing reactive sites for further chemical modification. This compound is essential for manufacturers in the dye and pigment industry, as well as for research and development in organic synthesis.

Application

• Dye and Pigment Intermediate: A crucial building block for the synthesis of azo dyes, acid dyes, and reactive dyes, contributing to color fastness and solubility.
• Chemical Synthesis: Used as a starting material or intermediate in the production of more complex organic compounds, including pharmaceuticals and agrochemicals.
• Research & Development: Employed in laboratory settings for method development and the synthesis of novel chemical entities.
• Analytical Reagent: Can serve as a reagent or standard in certain analytical chemistry applications.

Basic Information

Product Name	1-Naphthol-4-Sulfonic Acid
CAS No.	84-87-7
Molecular Formula	C₁₀H₈O₄S
Molecular Weight	224.23 g/mol
Synonyms	4-Hydroxy-1-naphthalenesulfonic Acid; NW Acid; 1,4-Naphtholsulfonic Acid; 4-Sulfo-1-naphthol; 1-Naphthol-4-sulphonic Acid; 4-Hydroxynaphthalene-1-sulfonic Acid; NSC 4032
EINECS	201-571-6

Quality Control

Our 1-Naphthol-4-Sulfonic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and composition. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area. Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%

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