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1-Naphthylamine-7-sulfonic acid

1-Naphthylamine-7-sulfonic acid Structure
1-Naphthylamine-7-sulfonic acid structure
CAS No.
119-28-8
Chemical Name:
1-Naphthylamine-7-sulfonic acid
Synonyms
SODIUM NAPHTHIONATE;SODIUM NAPTHIONATE;C.I. 26135;CLEVE'S ACID;1.7 Clevs Acid;Cleve's O-acid;1,7-CLEVES ACID;CLEVES ACID-1,7;1,7-cleve's acid;Cleve's theta-acid
CBNumber:
CB0141189
Molecular Formula:
C10H9NO3S
Molecular Weight:
223.25
MDL Number:
MFCD00004032
MOL File:
119-28-8.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-05-27 17:18:47
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1-Naphthylamine-7-sulfonic acid Properties

Melting point ≥300 °C(lit.)
Boiling point 220°C (rough estimate)
Density 1.3588 (rough estimate)
refractive index 1.6500 (estimate)
storage temp. Sealed in dry,Room Temperature
solubility Aqueous Base (Slightly), DMSO (Slightly, Sonicated)
form Powder
pka pK1: 3.66 (25°C)
Appearance Gray to brown Solid
Merck 14,2351
BRN 2115629
InChI InChI=1S/C10H9NO3S/c11-10-3-1-2-7-4-5-8(6-9(7)10)15(12,13)14/h1-6H,11H2,(H,12,13,14)
InChIKey QEZZCWMQXHXAFG-UHFFFAOYSA-N
SMILES C1=C2C(C=CC=C2N)=CC=C1S(O)(=O)=O
CAS DataBase Reference 119-28-8(CAS DataBase Reference)
FDA UNII 21QEG50798
NIST Chemistry Reference 1-Naphthylamine-7-sulfonic acid(119-28-8)
EPA Substance Registry System 2-Naphthalenesulfonic acid, 8-amino- (119-28-8)
UNSPSC Code 12352100
NACRES NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)  Corrosion (GHS05)
GHS05
Signal word  Danger
Hazard statements  H314
Precautionary statements  P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363
PPE Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
Hazard Codes  C
Risk Statements  34
Safety Statements  26-36/37/39-45
RIDADR  UN 2585 8/PG 3
WGK Germany  2
TSCA  TSCA listed
HazardClass  8
PackingGroup  III
HS Code  29214500
Storage Class 8A - Combustible corrosive hazardous materials
Hazard Classifications Skin Irrit. 2
REACH Registrations Active

1-Naphthylamine-7-sulfonic acid price More Price(34)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich A7782 8-Amino-2-naphthalenesulfonic acid ≥97% 119-28-8 25g $82.9 2026-04-30 Buy
Sigma-Aldrich A7782 8-Amino-2-naphthalenesulfonic acid ≥97% 119-28-8 100g $220 2026-04-30 Buy
TCI Chemical A0356 8-Amino-2-naphthalenesulfonic Acid >97.0%(HPLC)(T) 119-28-8 25g $105 2026-04-30 Buy
TCI Chemical A0356 8-Amino-2-naphthalenesulfonic Acid >97.0%(HPLC)(T) 119-28-8 500g $460 2021-12-16 Buy
Usbiological 285445 1-Naphthylamine-7-sulfonic acid Asreported 119-28-8 25g $319 2026-06-03 Buy
Product number Packaging Price Buy
A7782 25g $82.9 Buy
A7782 100g $220 Buy
A0356 25g $105 Buy
A0356 500g $460 Buy
285445 25g $319 Buy

1-Naphthylamine-7-sulfonic acid Chemical Properties,Uses,Production

Synthesis

1-Naphthylamine-7-sulfonic acid can be obtained by sulfonation, nitration, neutralization, reduction and acid precipitation of naphthalene.

Chemical Properties

Brown crystalline. 1-Aminonaphthalene-7-sulfonic acid [119- 28-8]. (8-aminonaphthalene-2-sulfonic acid), 1,7-Cleve’s acid, C10H9NO3S, Mr 223.24, is 0.5 % soluble in water at 25℃ and 3 % soluble at 100 ℃. The sodium, potassium, calcium, and magnesium salts are readily soluble in water but the barium salt is only sparingly soluble. Sulfonation with oleum at 50℃ gives 1- aminonaphthalene-4,7-disulfonic acid. Alkali fusion gives 8-amino-2-naphthol, and Bucherer-type hydrolysis gives 1-hydroxynaphthalene-7-sulfonic acid.

Uses

Intermediate of dyestuff

Uses

8-Amino-2-naphthalenesulfonic acid can be used as a reactant to synthesize:

  • Fe3O4/sulfonated polyaniline composite material via chemical oxidative polymerization with aniline in the presence of magnetite (Fe3O4) nanoparticles.
  • Prismatic crystals of strychnine-8-ammonio-2-naphthalenesulfonate-water by heating with strychnine in water/ethanol solvent mixture.
  • 5-amino-9-dialkylamino benzo[a]phenoxazine dyes (Nile blue analogs) by condensation with N-alkyl or N-sulfo-propyl 4-arylazo-substituted 3-hydroxyaniline.

Application

1-Naphthylamine-7-sulfonic acid can be used as a dye intermediate to prepare dyes such as direct light fast blue B2RL, direct light fast red brown RTL, and sulfur blue CV.

1-Naphthylamine-7-sulfonic acid Preparation Products And Raw materials

Raw materials

Titanium oxide Nitric acid Iron Sulfuric acid

Preparation Products

Sulphur Blue CV Peri acid disodium 3-[[4-[[4-amino-6(or 7)-sulphonatonaphthyl]azo]phenyl]azo]-6-[(2,4-diaminophenyl)azo]-4-hydroxynaphthalene-2-sulphonate 1-Aminonaphthalene-6-sulfonic acid Direct Blue 71
1-Amino-7-naphthol Acid orange 51 C.I. Mordant Brown 90 1,4-Benzenedisulfonic acid, 2-[[4-[[4-[(2,4-diamino-5-nitrophenyl)azo]-6-sulfo-1-naphthalenyl]azo]-1-naphthalenyl]azo]-, trisodium salt tetrasodium 2-[[2-amino-6-[[4-[[4-[(3-carboxylato-4-hydroxyphenyl)azo]-7-sulphonato-1-naphthyl]azo]-2,5-dimethoxyphenyl]azo]-5-hydroxy-7-sulphonato-1-naphthyl]azo]-5-nitrobenzoate
Direct Black 197 Direct Black 24 Direct Blue 82 Direct Brown 25 Mordant Brown 36
C.I. Direct green 21 DIRECT BLUE 78 C.I. Direct Brown 150 C.I. Direct Brown 149 2-Naphthalenesulfonic acid, 6-[[4-amino-6(or 7)-sulfo-1-naphthalenyl]azo]-3-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-4-hydroxy-, disodium salt

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1-Naphthylamine-7-sulfonic acid Suppliers

Global( 250)Suppliers
Supplier Tel Email Country ProdList Advantage
Huaian Jiamu Biotechnology Co., Ltd. 0517-83187139 18205232085 cai@jiamu-bio.com China 2999 58
Wuhan Linsheng Technology Co., Ltd 18162769939 251218324@qq.com China 3000 58
J & K SCIENTIFIC LTD. 18210857532 18210857532 jkinfo@jkchemical.com China 96815 76
3B Pharmachem (Wuhan) International Co.,Ltd. 18930552037 3bsc@sina.com China 15813 69
TCI (Shanghai) Development Co., Ltd. 021-67121386 Sales-CN@TCIchemicals.com China 24512 81
Energy Chemical 400-0056266 sales8178@energy-chemical.com China 44850 61
Adamas Reagent, Ltd. 400-6009262 15618770481 yhx@titansci.com China 14098 59
Shanghai Hanhong Scientific Co.,Ltd. 021-54306202 13764082696 info@hanhongsci.com China 42917 64
Shandong Xiya Chemical Co., Ltd 13355009207 13355009207 3007715519@qq.com China 18722 57
Syntechem Co.,Ltd info@syntechem.com China 12973 57
Supplier Advantage
Huaian Jiamu Biotechnology Co., Ltd. 58
Wuhan Linsheng Technology Co., Ltd 58
J & K SCIENTIFIC LTD. 76
3B Pharmachem (Wuhan) International Co.,Ltd. 69
TCI (Shanghai) Development Co., Ltd. 81
Energy Chemical 61
Adamas Reagent, Ltd. 59
Shanghai Hanhong Scientific Co.,Ltd. 64
Shandong Xiya Chemical Co., Ltd 57
Syntechem Co.,Ltd 57

View Lastest Price from 1-Naphthylamine-7-sulfonic acid manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
1-Naphthylamine-7-sulfonic acid pictures 2025-06-27 1-Naphthylamine-7-sulfonic acid
119-28-8
 $10.00-30.00 50KG 99% 500000kg Hebei Chuanghai Biotechnology Co., Ltd
1-Naphthylamine-7-sulfonic acid pictures 2025-06-20 1-Naphthylamine-7-sulfonic acid
119-28-8
 1kg 0.99 20 tons Hebei Yanxi Chemical Co., Ltd.
1-Naphthylamine-7-sulfonic acid pictures 2024-04-12 1-Naphthylamine-7-sulfonic acid
119-28-8
 1KG 99% 100MT Shaanxi Haibo Biotechnology Co., Ltd

1-Naphthylamine-7-sulfonic acid Spectrum

1-Naphthylamine-7-sulfonic acid(119-28-8)MS1-Naphthylamine-7-sulfonic acid(119-28-8)1HNMR1-Naphthylamine-7-sulfonic acid(119-28-8)IR11-Naphthylamine-7-sulfonic acid(119-28-8)IR2

119-28-8(1-Naphthylamine-7-sulfonic acid)Related Search:

Sulfamic acid monosodium salt Sulfanilic acid p-Toluenesulfonic acid Nickel bis(sulphamidate) Naphthalene-2-sulfonic acid
Taurine Sodium 2-naphthalenesulfonate Ammonium sulfamate Molasses 4-Amino-benzenesulfonic acid monosodium salt
6-Aminocaproic acid Amlodipine Besylate 1-Naphthylamine Folic acid Sulfamic acid
Glycine 1-Dodecanesulfonic acid sodium salt Ascoric Acid

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TIMTEC-BB SBB000621 SODIUM NAPTHIONATE SODIUM 1-NAPHTHYLAMINE-4-SULFONATE PARA-NAPHTHIONIC ACID, NA SALT NAPHTHIONIC ACID SODIUM SALT 0.5-WATER NAPHTHIONIC ACID SODIUM SALT NAPHTHYLAMINE-4-SULFONIC ACID SODIUM SALT 1-Amino-7-sulfonaphthalene 1-Aminonaphthalene-7-sulfonic acid 2-Naphthalenesulfonic acid, 8-amino- 2-Naphthalenesulfonicacid,8-amino- 1-Naphthylamine-7-sulfonic acid, Cleves acid-1,7 1.7 Clevs Acid 8-AMino-2-naphthalenesulfonic acid >=97% 8-Amino-2-naphthalenesulfonic acid, 97.5% 1-phthylamine-7-sulfonic acid 8-amino-2-naphthalenesulfonicaci 8-Naphthylamine-2-sulfonic acid beta-Naphthylamine-7-sulfonic acid C.I. 26135 Cleve's omega-acid or J-acid Cleve's theta-acid 1,7-CLEVES ACID 1,4-SODIUM NAPHTHIONATE 1-AMINO-4-SULFONAPHTHALENE SODIUM SALT 1-Amino-7-naphthalenesulfonic acid 4-AMINONAPHTHALENE-1-SULFONIC ACID SODIUM SALT 4-AMINONAPHTHALENE-1-SULPHONIC ACID SODIUM SALT 4-AMINO-1-NAPHTHALENESULFONIC ACID SODIUM SALT 0.5-WATER ALPHA-NAPHTHYLAMINE-7-SULFONIC ACID 8-AMINO-2-NAPHTHALENESULFONIC ACID 8-AMINONAPHTHALENE-2-SULFONIC ACID CLEVE'S ACID CLEVES ACID-1,7 1-NAPHTHYLAMINE-4-SULFONIC ACID SODIUM SALT 0.5-WATER 1-NAPHTHYLAMINE-7-SULFONIC ACID 8-Amino-2-naphtalenesulfonic acid 8-aminonaphthalene-2-sulphonic acid 1-NAPHTHYLAMINE-7-SULFONIC ACID TECHN. 97% Cleve's O-acid 8-Amino-naphthalin-2-sulfonsure 8-Amino-2-naphthalenesulfonicAcid> 8-Amino-2-naphthaL 1-Naphthylamine-7-sulfonicaci 1-Naphthylamine-7-sulfonic acid ISO 9001：2015 REACH 1-Naphthylamine-7-sulfonic acid 119-28-8 (1-NAPHYLAMINE-7-SULFONIC ACID) 1:7 CLEVES ACID 1,7-cleve's acid 1-Naphthylamine-7-sulfonic acid|1-Amino-7-naphthalenesulfonic acid 8-AMINO-2-NAPHTHALENE SULPHONIC ACIT 8-Amino-2-naphthalenesulfonic acid (1,7-Cleves acid) SODIUM NAPHTHIONATE 119-28-8 C10H9O3NS Building Blocks Organic Building Blocks Sulfur Compounds Sulfonic/Sulfinic Acid Salts