84-87-7

Basic information

• Product Name: 1-Naphthol-4-sulfonic acid
• Synonyms: 1-Naphthalenesulfonicacid,4-hydroxy-;4-hydroxy-1-naphthalenesulfonicaci;4-hydroxynaphthalene-1-sulphonicacid;Nevileandwinther’sacid;N-(M-SULFOPHENYL) GAMMA ACID;4-Hydroxy-1-naphthalenesulfonic acid;1-NAPHTHOL-4-SULFONIC ACID;Nevile-Winthers acid
• CAS NO: 84-87-7
• Molecular Formula: C₁₀H₈O₄S
• Molecular Weight: 224.23
• EINECS: 201-568-4
• Product Categories: Intermediates of Dyes and Pigments
• Mol File: 84-87-7.mol
• Article Data: 4

Chemical Properties

• Melting Point: 170℃
• Boiling Point: 335.63°C (rough estimate)
• Appearance: /
• Density: 1.4643 (rough estimate)
• Refractive Index: 1.7040 (estimate)
• PKA: 0.73±0.40(Predicted)
• CAS DataBase Reference: 1-Naphthol-4-sulfonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 1-Naphthol-4-sulfonic acid(84-87-7)
• EPA Substance Registry System: 1-Naphthol-4-sulfonic acid(84-87-7)

Safety Data

• Hazardous Substances Data: 84-87-7(Hazardous Substances Data)

Usage

Preparation

After drying under vacuum, the resulting filter cake contains 1-naphthol-4-sulphonic acid in a yield of 92% of theory and <0.5% 1-naphthol-2-sulphonic acid and 3% of 1-naphthol-2,4-disulphonic acid based on the weight of 1-naphthol-4-sulphonic acid.

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

Upstream product

• 90-15-3 α-naphthol 
• 7757-83-7 sodium sulfite 
• 567-18-0 1-naphthol-2-sulfonic acid 
• 95-50-1 1,2-dichloro-benzene 
• 7732-18-5 water 
• 618-06-4 m-sulfanilic acid diazonium salt 
• 83702-86-7 4-sulfo-naphthalene-1-diazonium-betaine 
• 6036-06-2 sodium 4-aminonaphthalene-1-sulfonate tetrahydrate 
• 7782-99-2 sulphurous acid 
• 1857-16-5 4-hydroxy-naphthalene-1,3-disulfonic acid 
• 84-86-6 4-amino-1-naphthalenesufonic acid 
• 7790-94-5 chlorosulfonic acid 
• 7664-93-9 sulfuric acid 
• 64-19-7 acetic acid 

Downstream Products

• 130-15-4 [1,4]naphthoquinone 
• 90-15-3 α-naphthol 
• 1254311-85-7 C₂₂H₂₄N₂O₅S 
• 1254311-86-8 C₂₄H₂₀N₂O₆S 
• 24801-50-1 4-hydroxy-3-((2-hydroxy-5-nitro-3-sulfophenyl)diazenyl)naphthalene-1-sulfonic acid 
• 1430221-07-0 C₆₅H₅₀N₆O₁₅S₃ 
• 1254103-30-4 C₃₁H₂₆N₂O₇S 
• 1254688-79-3 C₅₅H₄₄N₄O₁₂S₂ 
• 1215771-98-4 C₄₁H₃₂N₄O₁₀S₂ 

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.

Method for producing 1-naphthol-4-sulphonic acid

Disclosed is a method for producing 1-naphthol-4-sulphonic acid in free acid form and contaminated with less than 2% by weight of the isomeric 1-naphthol-2-sulphonic acid.