84-89-9

Basic information

• Product Name: 5-Amino-1-naphthalenesulfonic acid
• Synonyms: 5-amino-1-naphthalenesulfonicaci;laurentacid;Laurens Acid;Laurents acid~1-Naphthylamine-5-sulphonic acid;1-Amino-5-naphthalenesulfonic acid;1-Aminonaphtalene-5-sulfonic acid, 97%+;1-NAPHTHYLAMINE-5-SULFONICACID(LAURENT''SACID);5-Aminonaphthalene-1-sulfonic acid, tech. 90%
• CAS NO: 84-89-9
• Molecular Formula: C₁₀H₉NO₃S
• Molecular Weight: 223.25
• EINECS: 201-571-0
• Product Categories: Intermediates of Dyes and Pigments
• Mol File: 84-89-9.mol
• Article Data: 7

Chemical Properties

• Melting Point: >300°C
• Boiling Point: 220°C (rough estimate)
• Appearance: White or pale pink needle-like crystal
• Density: 1.3588 (rough estimate)
• Refractive Index: 1.6500 (estimate)
• PKA: pK1: 3.69 (25°C)
• Water Solubility: Soluble in hot water.
• Merck: 14,6404
• BRN: 2214149
• CAS DataBase Reference: 5-Amino-1-naphthalenesulfonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 5-Amino-1-naphthalenesulfonic acid(84-89-9)
• EPA Substance Registry System: 5-Amino-1-naphthalenesulfonic acid(84-89-9)

Safety Data

• Hazard Codes: C
• Statements: 20/21/22-34
• Safety Statements: 26-36/37/39-45
• RIDADR: UN 2585 8/PG 3
• WGK Germany: 3
• RTECS: QK1270500
• TSCA: Yes
• HazardClass: 8
• PackingGroup: III
• Hazardous Substances Data: 84-89-9(Hazardous Substances Data)

Usage

Uses

5-Aminonaphthalene-1-sulfonic acid is an deriva- tizing agents in the precolumn derivatization of some chiral phenoxy acid. Cu(II) based on a dansyl derivative was synthesized with 29.2% overall yield by a seven-step synthetic procedure from the readily available starting material 5-aminonaphthalene-1-sulfonic acid.

Purification Methods

Crystallise the acid under nitrogen from boiling water and dry it in a steam oven [Bryson Trans Faraday Soc 47 522, 527 1951]. [Beilstein 14 IV 2800.]

InChI:InChI=1/C10H9NO3S/c11-9-5-1-4-8-7(9)3-2-6-10(8)15(12,13)14/h1-6H,11H2,(H,12,13,14)/p-1

Upstream product

• 612-52-2 2-naphthylamine hydrochloride 
• 84-86-6 4-amino-1-naphthalenesufonic acid 
• 7664-93-9 sulfuric acid 
• 134-32-7 1-amino-naphthalene 
• 89108-43-0 5-chloronaphthalene-1-sulfonic acid 
• 7664-41-7 ammonia 
• 91-20-3 naphthalene 
• 90945-85-0 5-amino-naphthalene-1,6-disulfonic acid 
• 17521-00-5 5-nitronaphthalene-1-sulphonic acid 
• 7647-01-0 hydrogenchloride 
• 32651-58-4 5-(2-hydroxy-[1]naphthylazo)-naphthalene-1-sulfonic acid 
• 7790-94-5 chlorosulfonic acid 
• 575-36-0 1-acetamidonaphthalene 
• 85-47-2 1-naphthalenesulfonic acid 

Downstream Products

• 4272-77-9 dansyl acid 
• 98928-28-0 5-(4-hydroxyphenylazo)naphthalene-1-sulphonate 
• 605-69-6 1-hydroxy-2,4-dinitronaphthalene 
• 134-32-7 1-amino-naphthalene 
• 67900-43-0 5-amino-naphthalene-1,3,6-trisulfonic acid 
• 84-92-4 5,6-diaminonaphthalen-1-sulfonic acid 
• 89108-43-0 5-chloronaphthalene-1-sulfonic acid 
• 83-56-7 1,5-dihydroxynaphthalene 
• 117-59-9 1-hydroxynaphthalene-5-sulphonic acid 
• 90-15-3 α-naphthol 
• 83-55-6 5-amino-1-naphthol 
• 491580-06-4 N-[5-[[(cyclohexylmethyl)amino]sulfonyl]-1-naphthalenyl]acetamide 
• 491579-91-0 4-[[[(5-acetamido-1-naphthalenyl)sulfonyl]amino]methyl]benzoic acid 

Relevant articles and documents

Method for hydrogen catalyzed preparation of 1-naphthylamine-8-sulfonic acid

The invention discloses a method for hydrogen catalyzed preparation of 1-naphthylamine-8-sulfonic acid. The method includes the reduction steps of: placing a solution containing 1-sulfonyl-8-nitronaphthalene in a reduction pot, adding nickel powder, conducting starting and stirring, enclosing the reduction pot and pumping vacuum, then introducing hydrogen and maintaining the pressure at 1.2-1.3MPa, heating the mixed liquid to a temperature of 100-110DEG C, pumping out the mixed liquid from the bottom continuously and letting it flow into the reduction pot from the top, at the same time pumping out the gas from the top continuously and blowing the gas into the reduction pot from the bottom. The method for hydrogen catalyzed preparation of 1-naphthylamine-8-sulfonic acid provided by the invention can prepare the 1-naphthylamine-8-sulfonic acid product meeting the market requirements, and also can overcome the disadvantages of existing iron powder catalyzed preparation methods.

Process for the preparation of aminoarylsulphonic acids

In the process according to the invention for the preparation of aminoarylsulphonic acids by catalytic hydrogenation of nitroarylsulphonic acids, a substantial increase in the space-time yield in combination with reduced consumption of the catalyst is achieved by dispersing the hydrogen more finely and by limiting according to the invention the concentration of the nitroarylsulphonic acids to be hydrogenated.

Fiber-reactive disazo brown dye having vinylsulfone-type reactive group

A compound, or a salt thereof, represented by the following formula, STR1 wherein A is a substituted or unsubstituted phenylene or naphthylene group, B is STR2 in which R3 is a hydrogen atom or a lower alkyl, lower alkoxy, acylamino or ureido group, and R4 is a hydrogen atom or a lower alkyl or lower alkoxy group, R1 and R3 are independently a hydrogen atom or a substituted or unsubstituted lower alkyl group, X is a substituted or unsubstituted amino, lower alkoxy, substituted phenoxy or sulfo group, Y is --SO2 CH=CH2 or --SO2 CH2 CH2 Z, in which Z is a group capable of being split by the action of an alkali, and m is 2 or 3, which is useful for dyeing hydroxyl group- or amide group-containing fiber materials to give dyed products of a brown color having excellent fastness properties with good build-up property.