92-40-0

Basic information

• Product Name: 7-hydroxynaphthalene-2-sulphonic acid
• Synonyms: 7-hydroxynaphthalene-2-sulphonic acid;2-Naphthol-7-sulfonic acid;2-Hydroxynaphthalene-7-sulfonicacid;2-Hydroxy-7-naphthalenesulfonic acid;7-Hydroxynaphthalene-2-sulfonic acid;2-Naphthalenesulfonic acid, 7-hydroxy-
• CAS NO: 92-40-0
• Molecular Formula: C₁₀H₈O₄S
• Molecular Weight: 224.23312
• EINECS: 202-153-0
• Mol File: 92-40-0.mol
• Article Data: 3

Chemical Properties

• Appearance: /
• Density: 1.549g/cm³
• Refractive Index: 1.703
• CAS DataBase Reference: 7-hydroxynaphthalene-2-sulphonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 7-hydroxynaphthalene-2-sulphonic acid(92-40-0)
• EPA Substance Registry System: 7-hydroxynaphthalene-2-sulphonic acid(92-40-0)

Safety Data

• RIDADR: 1759
• HazardClass: 8
• PackingGroup: III
• Hazardous Substances Data: 92-40-0(Hazardous Substances Data)

Usage

General Description

7-hydroxynaphthalene-2-sulphonic acid is a chemical compound with the molecular formula C10H8O4S. It is derived from naphthalene and contains a hydroxyl group and a sulfonic acid group attached to the naphthalene ring. 7-hydroxynaphthalene-2-sulphonic acid is commonly used as a dye intermediate in the production of various types of dyes, including acid dyes, which are widely used in the textile industry. It is also used in the synthesis of pharmaceuticals and other organic compounds. 7-hydroxynaphthalene-2-sulphonic acid is a water-soluble compound and is often used in aqueous solutions for various applications. It is an important building block in organic chemistry and has versatile uses in various industrial processes.

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

Upstream product

• 91-20-3 naphthalene 
• 7664-93-9 sulfuric acid 
• 7647-01-0 hydrogenchloride 
• 861049-08-3 2-naphthol-1,7-sulfonic acid 
• 92-41-1 2,7-naphthalenedisulfonic acid 
• 135-19-3 β-naphthol 
• 494-44-0 7-aminonaphthalene-2-sulfonic acid 

Downstream Products

• 582-17-2 2,7-Dihydroxynaphthalene 
• 135-19-3 β-naphthol 
• 6361-38-2 2-naphtol-3,7-disulfonic acid 
• 494-44-0 7-aminonaphthalene-2-sulfonic acid 

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.

Aromatic azo sulfonylnitrene compounds

Compounds of the structure SPC1 Wherein R and R1 are the same or different and are selected from the group consisting of hydrogen, halogen, and alkyl from one to four carbon atoms, inclusive, and R2 is a substance which inhibits thrombogenic or clotting activity of a material and is that portion of a substituted aromatic which couples with a diazonium salt.