6-Amino-4-hydroxy-2-naphthalenesulfonic acid

ChemicalBook > CAS DataBase List > 6-Amino-4-hydroxy-2-naphthalenesulfonic acid

6-Amino-4-hydroxy-2-naphthalenesulfonic acid

Product Name: 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
CAS No.: 90-51-7
Chemical Name: 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
Synonyms: yacid;GAMMA ACID;c.i.developer3;Galmarine(silymarine soluble);aminonaphtholsulfonicacidgamma;7-amino-1-naphthol-3-sulfonicaci;2-AMINO-8-NAPTHOL-6-SULFONIC ACID;6-AMINO-4-NAPHTHOL-2-SULFONIC ACID;7-AMINO-1-NAPHTHOL-3-SULFONIC ACID;2-AMINO-8-NAPHTHOL-6-SULFONIC ACID
CBNumber: CB4443007
Molecular Formula: C10H9NO4S
Formula Weight: 239.25
MOL File: 90-51-7.mol

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6-Amino-4-hydroxy-2-naphthalenesulfonic acid Property

Boiling point:: 458℃[at 101 325 Pa]
Density: 1.4338 (rough estimate)
vapor pressure: 0Pa at 25℃
refractive index: 1.6500 (estimate)
storage temp.: Keep in dark place,Sealed in dry,Room Temperature
pka: -0.20±0.40(Predicted)
form: powder to crystal
color: White to Gray to Brown
Water Solubility: 4.5g/L(hot water)
InChIKey: HBZVNWNSRNTWPS-UHFFFAOYSA-N
LogP: -1.39
CAS DataBase Reference: 90-51-7(CAS DataBase Reference)
EPA Substance Registry System: 2-Naphthalenesulfonic acid, 6-amino-4-hydroxy- (90-51-7)

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Safety

Hazard Codes: C
Risk Statements: 34
Safety Statements: 26-27-28-36/37/39-45
RIDADR: UN 2585 8/PG 3
WGK Germany: 1
RTECS: QK1295250
HS Code: 2922.21.5000
Toxicity: LD50 intraperitoneal in mouse: > 500mg/kg

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H314Causes severe skin burns and eye damage

H315Causes skin irritation

H319Causes serious eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

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

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

P310Immediately call a POISON CENTER or doctor/physician.

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N-Bromosuccinimide Price

TCI Chemical

Product number: A0371
Product name: 6-Amino-4-hydroxy-2-naphthalenesulfonic Acid
Purity: >97.0%(HPLC)(T)
Packaging: 25g
Price: $40
Updated: 2024/03/01

TCI Chemical

Product number: A0371
Product name: 6-Amino-4-hydroxy-2-naphthalenesulfonic Acid
Purity: >97.0%(HPLC)(T)
Packaging: 500g
Price: $167
Updated: 2021/12/16

TRC

Product number: A611545
Product name: 6-Amino-4-hydroxy-2-naphthalenesulfonic Acid
Packaging: 25g
Price: $120
Updated: 2021/12/16

Biosynth Carbosynth

Product number: FA165510
Product name: 2-Amino-8-naphthol-6-sulfonic acid
Packaging: 250g
Price: $125
Updated: 2021/12/16

AK Scientific

Product number: T958
Product name: 6-Amino-4-hydroxy-2-naphthalenesulfonic Acid
Packaging: 25g
Price: $67
Updated: 2021/12/16

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6-Amino-4-hydroxy-2-naphthalenesulfonic acid Chemical Properties,Usage,Production

Chemical Properties

2-Amino-8-hydroxynaphthalene-6-sulfonic acid [90-51-7]. (6-amino-4-hydroxynaphthalene-2-sulfonic acid), g acid, C10H9NO4S, Mr 239.2, is obtained as white or gray crystals which are only sparingly soluble in water even at 100℃ (0.4%). The sodium salt dissolves readily in water to form solutions that exhibit a blue fluorescence. Coupling with diazo compounds is usually carried out under acid conditions and occurs in the 1-position; coupling in the 7-position can be effected in alkaline solution.

Uses

6-Amino-4-hydroxy-2-naphthalenesulfonic Acid is used in the synthesis of mono-azo dyes for application towards synthetic fibers. Also used in the synthesis of dyes with high technical properties for silk. The so-called g acid is an important component in azo dyes; coupling can be carried out under acid or alkaline conditions. The oamino azo configuration obtained under acid conditions leads to high lightfastness of special importance in monoazo acid red dyes for wool and polyamide, such as C.I. Acid Reds 37, 57, and 266.

Production Methods

2-Aminonaphthalene-6,8-disulfonic acid liquor is added over 16 h to 70 % sodium hydroxide at 190℃, while the water is allowed to evaporate to maintain the temperature. The reaction mixture is then heated for a further 6 h. Completion of the reaction is indicated by a workedup sample giving identical titers for both diazotization and coupling. The batch is diluted with water, acidified, and heated at 75℃ to expel sulfur dioxide. The product is filtered off at 55℃ and washed with warm water; yield is 84 %.
An improved process with 90 % yield is claimed by feeding concentrated 2-aminonaphthalene-6,8-disulfonic acid dipotassium salt liquor and caustic soda liquor simultaneously into the fusion reactor.

Flammability and Explosibility

Not classified

6-Amino-4-hydroxy-2-naphthalenesulfonic acid Preparation Products And Raw materials

Raw materials

2-naphthol-6,8-disulfonic acid dipotassium salt 2-Naphthylamine Sulfur dioxide Color paste Sodium hydroxide 2-Naphthol

Preparation Products

Direct Grey D disodium 5-((4-acetylamino-2-sulphophenyl)azo)-6-amino-4-hydroxynaphthalene-2-disulphonate

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View Lastest Price from 6-Amino-4-hydroxy-2-naphthalenesulfonic acid manufacturers

Hebei Zhuanglai Chemical Trading Co.,Ltd

Product: 6-Amino-4-hydroxy-2-naphthalenesulfonic acid 90-51-7
Price: US $32.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 5000kg/week
Release date: 2024-05-15

WUHAN FORTUNA CHEMICAL CO., LTD

Product: 6-Amino-4-hydroxy-2-naphthalenesulfonic acid 90-51-7
Price: US $0.00/Kg/Drum
Min. Order: 1KG
Purity: 90%min
Supply Ability: 1000kgs
Release date: 2021-08-10

Career Henan Chemical Co

Product: 6-Amino-4-hydroxy-2-naphthalenesulfonic acid 90-51-7
Price: US $1.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 500KG
Release date: 2018-12-20

90-51-7, 6-Amino-4-hydroxy-2-naphthalenesulfonic acidRelated Search:

CHLOROPHOSPHONAZO III ALTRENOGEST Glycine 4-Aminobutyric acid Sulfamic acid monosodium salt Sulfanilic acid Nickel bis(sulphamidate) Citric acid Molasses 4-Amino-benzenesulfonic acid monosodium salt 2-Naphthol Ammonium sulfamate Ethyl 2-(Chlorosulfonyl)acetate Sulfamic acid Folic acid Ascoric Acid CHROMOTROPE 2B Mordant Blue 13

Galmarine(silymarine soluble)

2-Amino-8-hydroxynaphthalene-6-sulfonic acid

6-AMINO-4-HYDROXY-2-NAPHTHALENE-SULPHONICACID

6-Amino-4-hydroxy-2-naphthalinsulfonsure

6-AMINO-4-HYDROXY-2-NAPHTHALENESULFONIC ACID (GAMMA ACID)

2-AMINO-8-NAPTHOL-6-SULFONIC ACID

1-Hydroxy-7-amino-3-naphthalenesulfonic acid

4-Hydroxy-6-amino-2-naphthalenesulfonic acid

6-azanyl-4-hydroxy-naphthalene-2-sulfonic acid

gamma Acid 2-Amino-8-naphthol-6-sulfonic Acid 7-Amino-1-naphthol-3-sulfonic Acid

2-Amino-8-naphthol-6-sulfonic acid (γ acid)

6-AMINO-4-NAPHTHOL-2-SULFONIC ACID

6-AMINO-4-HYDROXY-2-NAPHTHALENESULFONIC ACID

GAMMA ACID

7-AMINO-1-NAPHTHOL-3-SULFONIC ACID

7-AMINO-1-HYDROXY-3-SULFONAPHTHALENE

2-AMINO-8-NAPHTHOL-6-SULFONIC ACID

2-Naphthalenesulfonicacid,6-amino-4-hydroxy-

6-amino-4-hydroxy-2-naphthalenesulfonicaci

6-Amino-4-hydroxynaphthalene-2-sulfonicacid

6-Amino-4-hydroxy-2-naphthalenesulfonic acid OR 2-Amino-8-hydroxynaphthalene-6-sulfonic acid

7-amino-1-naphthol-3-sulfonicaci

aminonaphtholsulfonicacidgamma

c.i.developer3

yacid

6-amino-4-hydroxynaphthalene-2-sulphonic acid

6-Amino-4-hydroxy-2-naphthalenesulfonic Acid &gt

6-Amino-4-hydroxy-2-naphthalenesulfonic acid ISO 9001：2015 REACH

2-Amino-8-naphthol-6-sulfonic acid ( gamma Acid )

90-51-7 6-Amino-4-hydroxy-2-naphthalenesulfonic acid

6-Amino-4-hydroxynaphthalin-2-sulfonsure

90-51-7

H2NCd0H5OHSO3H

C10H9O4NS

Organic Building Blocks

Sulfur Compounds

Sulfonic/Sulfinic Acids

Building Blocks

SULFONIC ACID

Building Blocks

Chemical Synthesis

Organic Building Blocks

Sulfonic/Sulfinic Acids

Sulfur Compounds

Intermediates

Organics

Intermediates of Dyes and Pigments