2-Aminonaphthalene-1-sulfonic acid

Product Name: 2-Aminonaphthalene-1-sulfonic acid
CAS No.: 81-16-3
Chemical Name: 2-Aminonaphthalene-1-sulfonic acid
Synonyms: Nsc5523;TOBIAS ACI;TOBIAS ACID;TOBIAC ACID;SUPER J ACID;Tobiasacid,98%;Tourette's acid;Wln: L66J bswq cz;kyselinatobiasova;TOBIAS ACID 97 PCT
CBNumber: CB1128987
Molecular Formula: C10H9NO3S
Formula Weight: 223.25
MOL File: 81-16-3.mol

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2-Aminonaphthalene-1-sulfonic acid Property

Melting point:: 180 °C
Boiling point:: 220°C (rough estimate)
Density: 1.3588 (rough estimate)
refractive index: 1.5250 (estimate)
storage temp.: -20°C Freezer, Under inert atmosphere
solubility: DMSO (Slightly), Methanol (Slightly, Heated), Water (Slightly, Heated)
form: Solid
pka: pK1: 2.35 (25°C)
color: White to Off-White
Water Solubility: 4.083g/L(20 ºC)
Merck: 14,6406
BRN: 613084
CAS DataBase Reference: 81-16-3(CAS DataBase Reference)
NIST Chemistry Reference: 2-Naphthylamine-1-sulfonic acid(81-16-3)
EPA Substance Registry System: 2-Amino-1-naphthalenesulfonic acid (81-16-3)

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Safety

Risk Statements: 36/37/38-40
Safety Statements: 26-36/37/39
RIDADR: 2585
WGK Germany: 1
RTECS: QK1250000
TSCA: Yes
HS Code: 2921.45.9010
HazardClass: 8
PackingGroup: III
Hazardous Substances Data: 81-16-3(Hazardous Substances Data)

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H319Causes serious eye irritation

H320Causes eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

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

P337+P313IF eye irritation persists: Get medical advice/attention.

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N-Bromosuccinimide Price

TCI Chemical

Product number: A0343
Product name: 2-Amino-1-naphthalenesulfonic Acid
Purity: >98.0%(HPLC)(T)
Packaging: 25g
Price: $48
Updated: 2024/03/01

TCI Chemical

Product number: A0343
Product name: 2-Amino-1-naphthalenesulfonic Acid
Purity: >98.0%(HPLC)(T)
Packaging: 500g
Price: $408
Updated: 2024/03/01

Alfa Aesar

Product number: A18644
Product name: 2-Aminonaphthalene-1-sulfonic acid, 98%
Packaging: 500g
Price: $70.4
Updated: 2024/03/01

Alfa Aesar

Product number: A18644
Product name: 2-Aminonaphthalene-1-sulfonic acid, 98%
Packaging: 2500g
Price: $239
Updated: 2023/06/20

TRC

Product number: A618330
Product name: 2-Amino-1-naphthalenesulfonic Acid
Packaging: 250g
Price: $120
Updated: 2021/12/16

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2-Aminonaphthalene-1-sulfonic acid Chemical Properties,Usage,Production

Chemical Properties

Grey white to light pink powder. 2-Aminonaphthalene-1-sulfonic acid [81-16-3]. Tobias acid, C10H9NO3S, Mr 223.24, is sparingly soluble in water but the sodium salt is readily soluble. Coupling with diazo compounds takes place in the 1-position with elimination of the sulfonic acid group.

Uses

Azo dye intermediate, optical brighteners. Sulfonation with oleum gives 2-aminonaphthalene-1,5-disulfonic acid, which can be desulfonated to produce 2-aminonaphthalene-5- sulfonic acid. Tobias acid is used as a diazo component in acid dyes (e.g., C.I. Acid Yellow 19), red reactive dyes, and pigments such as the important Lithol Reds, [e.g., C.I. Pigment Red 49]. The free acid of C.I. Pigment Red 49 is also remarkably insoluble and can be used as a pigment.

Uses

2-Amino-1-naphthalenesulfonic acid has been used in the preparation of 2-(2-naphthylamino)benzoxazole by reacting with 2-chlorobenzoxazole.

Production Methods

2-Hydroxynaphthalene-1-sulfonic acid is heated with a mixture of ammonia and ammonium sulfite in an autoclave at 150 ℃ and 1 MPa for 30 h. The reaction mixture is added to a slurry of lime, and excess ammonia is driven off. Inorganic calcium salts are filtered off at 80℃, and the filtrate is acidified with hydrochloric acid at 40℃ to precipitate Tobias acid in 95 % yield. Care must be taken throughout the process to avoid desulfonation and formation of 2- naphthylamine.

General Description

2-Amino-1-naphthalenesulfonic acid is a manufacturing intermediate in the monosulfo monoazo color additive D&C Red No. 34 and its lakes.

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 III 2240, 14 IV 2792.]

2-Aminonaphthalene-1-sulfonic acid Preparation Products And Raw materials

Raw materials

Sulfur dioxide 2-Ethylnitrobenzene Chlorosulfonic acid Hydrochloric acid Sodium hydroxide Sodium sulfonate 2-Naphthol Sulfuric acid Ammonia

Preparation Products

2-Amino-1,5-naphthalenedisulfonic acid Lithol Red disodium 2-[[1-(2,5-dichloro-4-sulphonatophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]naphthalene-1-sulphonate REACTIVE RED 195 sodium 2-[(2-hydroxynaphthyl)azo]naphthalenesulphonate J acid 3-Hydroxy-N-2-naphthyl-2-naphthamide ReactivebrilliantredKE-7B

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2-Aminonaphthalene-1-sulfonic acid Suppliers

Americas 1 Canada 1 China 269 Europe 2 France 1 Germany 4 India 57 Japan 4 Slovakia 1 South Korea 2 Switzerland 2 The Netherlands 2 United Kingdom 8 United States 26 Global 380

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View Lastest Price from 2-Aminonaphthalene-1-sulfonic acid manufacturers

Hebei Chuanghai Biotechnology Co,.LTD

Product: 2-Aminonaphthalene-1-sulfonic acid 81-16-3
Price: US $5.00-2.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 10000kg
Release date: 2024-08-23

Hebei Weibang Biotechnology Co., Ltd

Product: 2-Aminonaphthalene-1-sulfonic acid 81-16-3
Price: US $0.00-0.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 20 mt
Release date: 2022-12-23

Hebei Mojin Biotechnology Co., Ltd

Product: 2-Aminonaphthalene-1-sulfonic acid 81-16-3
Price: US $0.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 50000KG/month
Release date: 2023-08-16

81-16-3, 2-Aminonaphthalene-1-sulfonic acidRelated Search:

1-Naphthylamine Taurine Amlodipine Besylate Ethyl 2-(Chlorosulfonyl)acetate p-Toluenesulfonic acid Sulfanilic acid Ammonium sulfamate Sulfamic acid Molasses 4-Amino-benzenesulfonic acid monosodium salt 1-DODECANESULFONIC ACID SODIUM SALT 1,5-Naphthalenedisulfonic acid 2-Naphthylamine Glycine Folic acid 1-Naphthalenesulfonic acid Sulfamic acid monosodium salt Nickel bis(sulphamidate)

SUPER J ACID

2 NAPHTHYLAMINE SULPHONIC ACID

2-NAPHTHYLAMINE-1-SULFONIC ACID

2-AMINO-1-NAPHTHALENESULFONIC ACID

2-AMINONAPHTHALENE-1-SULFONIC ACID

TOBIAS ACID

1-Naphthalenesulfonic acid, 2-amino-

1-Naphthalenesulfonicacid,2-amino-

2-amino-1-naphthalenesulfonic

2-amino-1-naphthalenesulfonicaci

2-aminonaphthalene-1-sulphonic acid

TOBIAS ACID 97 PCT

TOBIAS ACI

TOBIAC ACID

BETA-NAPHTHYLAMINE-1-SULFONIC ACID

2-amino-aphthalene-sulfonic acid

Tobiasacid,98%

2-AMINO-1-NAPHTHALENESULPHONICACID

2-Naphthylamin-1-sulfonsure

2-NAPHTHYLAMINE-1-SULFONIC ACID (TOBIAS ACID)

2-Aminonaphthalin-1-sulfonsaure

1-Sulfo-2-naphthylamine

Naphthalenesulfonic acid, 2-amino-

Nsc5523

Wln: L66J bswq cz

2-amino-1-naphthalenesulfonate

Tobias acid:2-Naphthylamine-1-sulfonic acid:Tobias acid

2-Naphtylamine-1-Sulfonic Acid

2-Amino-1-naphthalenesulfonic acid≥ 99% (Assay)

Kyselina 2-naftylamin-1-sulfonova

Kyselina tobiasova

kyselina2-naftylamin-1-sulfonova

kyselina2-naftylamin-1-sulfonova(czech)

kyselinatobiasova

kyselinatobiasova(czech)

NaphthylaMine-1-sulfonic

2-Amino-1-naphthalenesulfonic Acid &gt

2-Naphthylamine-1-SulfonicAci

2-Aminonaphthalene-1-sulfonic acid ISO 9001：2015 REACH

2-Amino-1-naphthalenesulfonic Acid, ≥ 98.0%

Tourette's acid

Refined Tocharic Acid

81-16-3

C10H8NO3S

Building Blocks

Organic Building Blocks

Sulfur Compounds

Sulfonic/Sulfinic Acids

Organics

Intermediates

Intermediates of Dyes and Pigments