132-57-0

Basic information

• Product Name: 7-hydroxynaphthalene-1-sulphonic acid
• Synonyms: 7-hydroxynaphthalene-1-sulphonic acid;7-hydroxynaphthalene-1-sulfonic acid;7-Hydroxy-1-naphthalenesulfonic acid
• CAS NO: 132-57-0
• Molecular Formula: C₁₀H₈O₄S
• Molecular Weight: 224.23312
• EINECS: 205-066-6
• Product Categories: Intermediates of Dyes and Pigments
• Mol File: 132-57-0.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 335.63°C (rough estimate)
• Flash Point: °C
• Appearance: /
• Density: 1.4643 (rough estimate)
• Refractive Index: 1.5400 (estimate)
• PKA: 0.26±0.40(Predicted)
• CAS DataBase Reference: 7-hydroxynaphthalene-1-sulphonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 7-hydroxynaphthalene-1-sulphonic acid(132-57-0)
• EPA Substance Registry System: 7-hydroxynaphthalene-1-sulphonic acid(132-57-0)

Safety Data

• Hazardous Substances Data: 132-57-0(Hazardous Substances Data)

Usage

General Description

7-hydroxynaphthalene-1-sulphonic acid is a chemical compound that is commonly used in the production of dyes and pigments. It is a sulfonic acid derivative of naphthalene, a polycyclic aromatic hydrocarbon. 7-hydroxynaphthalene-1-sulphonic acid is water-soluble and is often used as a dye intermediate in the production of textiles, paper, and leather. It is also used in the manufacturing of fluorescent whitening agents and optical brighteners. Additionally, 7-hydroxynaphthalene-1-sulphonic acid is used as a pH indicator and as a reagent in chemical analysis. 7-hydroxynaphthalene-1-sulphonic acid is an important component in various industries, and its properties and uses make it a valuable chemical in the field of chemistry and materials science.

InChI:InChI=1/C10H8O4S/c11-8-5-4-7-2-1-3-10(9(7)6-8)15(12,13)14/h1-6,11H,(H,12,13,14)

Upstream product

• 7664-93-9 sulfuric acid 
• 567-47-5 2-hydroxy-naphthalene-1-sulfonic acid 
• 135-19-3 β-naphthol 
• 110295-86-8 8-sulfonato-2-naphthalenediazonium zwitterion 
• 86-64-6 3-hydroxy-5-sulfo-[2]naphthoic acid 
• 86-60-2 7-aminonaphthalene-1-sulfonic acid 

Downstream Products

• 86-97-5 5-amino-2-naphthol 
• 93-01-6 2-naphthol-6-sulfonic acid 
• 135-19-3 β-naphthol 
• 51850-49-8 1,7-diacetoxynaphthalene 
• 7664-93-9 sulfuric acid 
• 89-86-1 4-hydroxysalicylic acid 
• 21784-66-7 2-anilinonaphthalene-8-sulfonic acid 
• 86-60-2 7-aminonaphthalene-1-sulfonic acid 
• 118-32-1 2-naphthol-6,8-disulfonic acid 
• 575-38-2 1,7-Dihydroxynaphthalene 
• 4834-95-1 7-hydroxy-8-azophenyl-naphthalene-1-sulfonic acid 
• 29921-50-4 8-chloronaphthalen-2-ol 
• 2050-73-9 1,7-dichloronaphthalene 

Relevant articles and documents

Process for aryl-quinone and aryl-naphthoquinone diazide sulfonic acids

A process for the preparation of aryl-diazide-sulfonic acids by a series of sequential in-situ process steps. The process comprises the nitrosation of a hydroxyarylsulfonic acid; conversion of the nitroso-derivative to a sulfamate which is then diazotized to the diazide. Temperature and pH are maintained in predetermined ranges to maintain the reaction products in solution without the formation side-products or the need to isolate intermediates. The process of the invention is particularly useful in the preparation of light-sensitive materials such as naphthoquinonediazide sulfonic acids which are used in the preparation of photoresist compositions. The invention provides a high purity product at a high material efficiency, high equipment utilization, low effluent discharge, and reduced cost.

Barium laked phenylazonaphthalene dye containing sulfonic acid groups

Azo dyes containing sulfonic acid groups laked with barium and derived from an anilinesulfonic acid as diazo component and a β-naphtholsulfonic acid as coupling component for example a dye of the formula STR1 The dyes are eminently suitable as pigments for coloring surface coating compositions, printing inks and particlarly resins.