Synthesis
ChemicalBook > CAS DataBase List > 1-Naphthylamine-7-sulfonic acid

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;1,7-cleve's 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)
Merck 
14,2351
BRN 
2115629
InChIKey
QEZZCWMQXHXAFG-UHFFFAOYSA-N
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 
Yes
HazardClass 
8
PackingGroup 
III
HS Code 
29214500
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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
$75.5
Updated
2024/03/01
Sigma-Aldrich
Product number
A7782
Product name
8-Amino-2-naphthalenesulfonic acid
Purity
≥97%
Packaging
100g
Price
$201
Updated
2024/03/01
TCI Chemical
Product number
A0356
Product name
8-Amino-2-naphthalenesulfonic Acid
Purity
>97.0%(HPLC)(T)
Packaging
25g
Price
$60
Updated
2024/03/01
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
Alfa Aesar
Product number
J65304
Product name
8-Aminonaphthalene-2-sulfonic acid, 95%
Packaging
25g
Price
$67
Updated
2024/03/01
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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 161 Europe 3 France 2 Germany 3 India 15 Japan 5 Slovakia 1 Switzerland 2 The Netherlands 1 United Kingdom 6 United States 30 Global 230
Manchester Organics
Tel
--
Fax
--
Email
info@manchesterorganics.com
Country
United Kingdom
ProdList
6834
Advantage
67
Leancare Ltd.
Tel
--
Fax
--
Email
enquiry@leancare.co.uk
Country
United Kingdom
ProdList
6446
Advantage
42
CARBONE SCIENTIFIC CO.,LTD
Tel
--
Fax
--
Email
sales@carbonesci.com
Country
United Kingdom
ProdList
6666
Advantage
30
Eurolabs Limited
Tel
--
Fax
--
Country
United Kingdom
ProdList
6309
Advantage
46
VWR International
Tel
--
Fax
--
Email
solutions@vwr.com
Country
United Kingdom
ProdList
6548
Advantage
82
Fisher Scientific UK
Tel
--
Fax
--
Email
sarahr@fisher.co.uk
Country
United Kingdom
ProdList
1157
Advantage
81
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View Lastest Price from 1-Naphthylamine-7-sulfonic acid manufacturers

hebei hongtan Biotechnology Co., Ltd
Product
1-Naphthylamine-7-sulfonic acid 119-28-8
Price
US $30.00/kg
Min. Order
1kg
Purity
98%
Supply Ability
2000kg
Release date
2024-03-25
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
Hebei Weibang 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

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  • 8-AMINONAPHTHALENE-2-SULFONIC ACID
  • CLEVE'S ACID
  • CLEVES ACID-1,7
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  • 1-Naphthylamine-7-sulfonic acid 119-28-8
  • (1-NAPHYLAMINE-7-SULFONIC ACID) 1:7 CLEVES ACID
  • 1,7-cleve's acid
  • 119-28-8
  • C10H9O3NS
  • Building Blocks
  • Organic Building Blocks
  • Sulfur Compounds
  • Sulfonic/Sulfinic Acid Salts
  • Sulfonic/Sulfinic Acids
  • Intermediates of Dyes and Pigments