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

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

Downstream Products

• 20096-52-0 1-anilinonaphthalene-5-sulfonic acid 
• 99461-00-4 5-(4-Hydroxy-3-isopropyl-phenylazo)-naphthalene-1-sulfonic acid anion 
• 98928-36-0 5-(4-Hydroxy-3-propyl-phenylazo)-naphthalene-1-sulfonic acid anion 
• 99461-15-1 5-(4-Hydroxy-3,5-diisopropyl-phenylazo)-naphthalene-1-sulfonic acid anion 
• 99461-02-6 5-(3-tert-Butyl-4-hydroxy-phenylazo)-naphthalene-1-sulfonic acid anion 
• 98928-28-0 5-(4-hydroxyphenylazo)naphthalene-1-sulphonate 
• 102568-35-4 sodium 5-acetamido-1-naphthalenesulfonate 
• 83-55-6 5-amino-1-naphthol 
• 134-32-7 1-amino-naphthalene 
• 67900-43-0 5-amino-naphthalene-1,3,6-trisulfonic acid 
• 946612-72-2 JB-2-48 
• 946612-80-2 5-(benzylideneamino)naphthalene-1-sulfonamide 
• 1351863-11-0 5-(benzylamino)naphthalene-1-sulfonamide 

Relevant articles and documents

Preparation method of 1-naphthylamine-5-sulfonic acid

The invention discloses a preparation method of 1-naphthylamine-5-sulfonic acid. The preparation method comprises the following steps of step one, sulfonation: refined naphthalene is added after sulfuric acid is added to a sulfonation pot and stirred, steam is turned on for warming, and the reaction is kept for a period of time; then second batch of sulfuric acid is added, and the reaction is kept for a period of time; step two, nitrification: nitric acid is added, the temperature is controlled, and the reaction is kept for a period of time; the acidity is enabled to reach 45%-46%, and the amino value is larger than or equal to 410 g/kg; step three, neutralization: dolomite suspension liquid is added, excess sulfuric acid and hydrogen ions on the sulfonic acid group are neutralized, and the end point is reached if the color of congo red test paper doesn't change into blue; step four, reduction: iron powder is added, the reduction rate is controlled to be above 99%, and the amino value is controlled to be between 90 g/t to 110 g/t; step five, acidification: 1-naphthylamine-8-sulfonic acid is subjected to acidification separation to prepare 1-naphthylamine-5-sulfonic acid mother liquor; step six, the 1-naphthylamine-5-sulfonic acid mother liquor is acidized to further prepare the 1-naphthylamine-5-sulfonic acid.

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.