ChemicalBook >> CAS DataBase List >>6-Amino-4-hydroxy-2-naphthalenesulfonic acid
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
- Molecular Weight:
- 239.25
- MDL Number:
- MFCD00003973
- MOL File:
- 90-51-7.mol
- MSDS File:
- SDS
Last updated:2023-11-07 14:23:12
| 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) |
| FDA UNII | 0PLB93P56X |
| EPA Substance Registry System | 2-Naphthalenesulfonic acid, 6-amino-4-hydroxy- (90-51-7) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS05,GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H315-H319-H314 | |||||||||
| Precautionary statements | P280-P305+P351+P338-P310-P264-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313 | |||||||||
| 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 | |||||||||
| NFPA 704 |
|
6-Amino-4-hydroxy-2-naphthalenesulfonic acid price More Price(17)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| TCI Chemical | A0371 | 6-Amino-4-hydroxy-2-naphthalenesulfonic Acid >97.0%(HPLC)(T) | 90-51-7 | 25g | $40 | 2024-03-01 | Buy |
| TCI Chemical | A0371 | 6-Amino-4-hydroxy-2-naphthalenesulfonic Acid >97.0%(HPLC)(T) | 90-51-7 | 500g | $167 | 2021-12-16 | Buy |
| TRC | A611545 | 6-Amino-4-hydroxy-2-naphthalenesulfonic Acid | 90-51-7 | 25g | $120 | 2021-12-16 | Buy |
| Biosynth Carbosynth | FA165510 | 2-Amino-8-naphthol-6-sulfonic acid | 90-51-7 | 250g | $125 | 2021-12-16 | Buy |
| AK Scientific | T958 | 6-Amino-4-hydroxy-2-naphthalenesulfonic Acid | 90-51-7 | 25g | $67 | 2021-12-16 | Buy |
6-Amino-4-hydroxy-2-naphthalenesulfonic acid Chemical Properties,Uses,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
1of2
Preparation Products
Direct Grey D
disodium 5-((4-acetylamino-2-sulphophenyl)azo)-6-amino-4-hydroxynaphthalene-2-disulphonate
4-Amino-6-[[4'-[(7-amino-1-hydroxy-3-sulfo-2-naphtyl)azo]-1,1'-biphenyl-4-yl]azo]-5-hydroxy-3-[(4-nitrophenyl)azo]-2,7-naphthalenedisulfonic acid trisodium salt
C.I. Direct Black 151
Direct Grey D
Acid Red 440
Direct Black 197
CHLORAZOL BLACK BH
5-[[2,4-Diamino-5-[(8-hydroxy-6-sodiosulfo-2-naphthalenyl)azo]phenyl]azo]-4-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulfonic acid disodium salt
3-Amino-4-[[4'-[(2-amino-8-hydroxy-6-sodiosulfo-1-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2,7-disulfonic acid disodium salt
DIRECT BLACK 22
C.I. Direct Brown 166
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
Glycine, N-[5-amino-4-[2-[4-[2-[[2-(2,4-diamino-5-methylphenyl)diazenyl]hydroxysulfo-2-naphthalenyl]diazenyl]phenyl]diazenyl]-2-methylphenyl]-, sodium salt (1:2)
ACID RED 266
1of4
Global( 345)Suppliers
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Shanghai Daken Advanced Materials Co.,Ltd | +86-371-66670886 | info@dakenam.com | China | 15928 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21695 | 55 |
| Shanghai Zheyan Biotech Co., Ltd. | 18017610038 | zheyansh@163.com | CHINA | 3620 | 58 |
| career henan chemical co | +86-0371-86658258 | sales@coreychem.com | China | 29914 | 58 |
| Hubei Jusheng Technology Co.,Ltd. | 18871490254 | linda@hubeijusheng.com | CHINA | 28180 | 58 |
| Jinan Finer Chemical Co., Ltd | +86-531-88989536 +86-15508631887 | sales@finerchem.com | China | 2967 | 58 |
| Hubei xin bonus chemical co. LTD | 86-13657291602 | linda@hubeijusheng.com | CHINA | 22968 | 58 |
| Shandong chuangyingchemical Co., Ltd. | 18853181302 | sale@chuangyingchem.com | CHINA | 5909 | 58 |
| Chongqing Chemdad Co., Ltd | +86-023-61398051 +8613650506873 | sales@chemdad.com | China | 39916 | 58 |
| CONIER CHEM AND PHARMA LIMITED | +8618523575427 | sales@conier.com | China | 47465 | 58 |
View Lastest Price from 6-Amino-4-hydroxy-2-naphthalenesulfonic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2022-07-29 | 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
90-51-7
|
US $1.10 / g | 1g | 99.00% | 100 Tons Min | Dideu Industries Group Limited | |
 |
2021-09-29 | 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
90-51-7
|
US $0.00 / Kg/Drum | 1KG | 90%min | 1000kgs | WUHAN FORTUNA CHEMICAL CO., LTD | |
 |
2019-12-31 | 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
90-51-7
|
US $0.10 / KG | 1KG | 99.0% | 1000 tons | Shaanxi Dideu Medichem Co. Ltd |
-
- 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
90-51-7
- US $1.10 / g
- 99.00%
- Dideu Industries Group Limited
-
- 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
90-51-7
- US $0.00 / Kg/Drum
- 90%min
- WUHAN FORTUNA CHEMICAL CO., LTD
-
- 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
90-51-7
- US $0.10 / KG
- 99.0%
- Shaanxi Dideu Medichem Co. Ltd
90-51-7(6-Amino-4-hydroxy-2-naphthalenesulfonic acid)Related Search:
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
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
7-amino-1-naphthol-3-sulfonicaci
aminonaphtholsulfonicacidgamma
c.i.developer3
yacid
6-amino-4-hydroxynaphthalene-2-sulphonic acid
2-Amino-8-naphthol-6-sulfonic acid (γ acid)
6-Amino-4-hydroxy-2-naphthalenesulfonic acid OR 2-Amino-8-hydroxynaphthalene-6-sulfonic acid
6-Amino-4-hydroxy-2-naphthalenesulfonic Acid >
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