1-Naphthylamine-7-sulfonic acid

Synthesis

Product Name: 1-Naphthylamine-7-sulfonic acid
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
Formula Weight: 223.25
MOL File: 119-28-8.mol

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1-Naphthylamine-7-sulfonic acid Property

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)
NIST Chemistry Reference: 1-Naphthylamine-7-sulfonic acid(119-28-8)
EPA Substance Registry System: 2-Naphthalenesulfonic acid, 8-amino- (119-28-8)

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Safety

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

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H314Causes severe skin burns and eye damage

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P363Wash contaminated clothing before reuse.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: A7782
Product name: 8-Amino-2-naphthalenesulfonic acid
Purity: ≥97%
Packaging: 25g
Price: $77.8
Updated: 2025/07/31

Sigma-Aldrich

Product number: A7782
Product name: 8-Amino-2-naphthalenesulfonic acid
Purity: ≥97%
Packaging: 100g
Price: $207
Updated: 2025/07/31

TCI Chemical

Product number: A0356
Product name: 8-Amino-2-naphthalenesulfonic Acid
Purity: >97.0%(HPLC)(T)
Packaging: 25g
Price: $60
Updated: 2025/07/31

TCI Chemical

Product number: A0356
Product name: 8-Amino-2-naphthalenesulfonic Acid
Purity: >97.0%(HPLC)(T)
Packaging: 500g
Price: $460
Updated: 2021/12/16

TRC

Product number: A618353
Product name: 1-Amino-7-naphthalenesulfonicAcid
Packaging: 25g
Price: $125
Updated: 2021/12/16

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1-Naphthylamine-7-sulfonic acid Chemical Properties,Usage,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

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1-Naphthylamine-7-sulfonic acid Suppliers

Americas 1 China 168 Europe 3 France 2 Germany 3 India 15 Japan 5 Slovakia 1 Switzerland 2 The Netherlands 1 United Kingdom 6 United States 30 Global 237

Huaian Jiamu Biotechnology Co., Ltd.

Tel: 0517-83187139 18205232085
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Tel: 18162769939
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J & K SCIENTIFIC LTD.

Tel: 18210857532; 18210857532
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Tel: 821-50328103-801 18930552037
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TCI (Shanghai) Development Co., Ltd.

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Energy Chemical

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Adamas Reagent, Ltd.

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Email: chenyj@titansci.com
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Shanghai Hanhong Scientific Co.,Ltd.

Tel: 021-54306202 13764082696
Email: info@hanhongsci.com
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Shandong Xiya Chemical Co., Ltd

Tel: 13355009207 13355009207
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Syntechem Co.,Ltd

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

Hebei Chuanghai Biotechnology Co., Ltd

Product: 1-Naphthylamine-7-sulfonic acid 119-28-8
Price: US $30.00-10.00/KG
Min. Order: 50KG
Purity: 99%
Supply Ability: 500000kg
Release date: 2024-10-24

Hebei Yanxi Chemical Co., Ltd.

Product: 1-Naphthylamine-7-sulfonic acid 119-28-8
Price: US $0.00/kg
Min. Order: 1kg
Purity: 0.99
Supply Ability: 20 tons
Release date: 2023-11-27

Shaanxi Haibo Biotechnology Co., Ltd

Product: 1-Naphthylamine-7-sulfonic acid 119-28-8
Price: US $0.00-0.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 100MT
Release date: 2023-08-22

119-28-8, 1-Naphthylamine-7-sulfonic acidRelated Search:

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

TIMTEC-BB SBB000621

SODIUM NAPTHIONATE

SODIUM NAPHTHIONATE

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&gt

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

119-28-8

C10H9O3NS

Building Blocks

Organic Building Blocks

Sulfur Compounds

Sulfonic/Sulfinic Acid Salts

Sulfonic/Sulfinic Acids

Intermediates of Dyes and Pigments