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

6-Amino-4-hydroxy-2-naphthalenesulfonic acid Structure
6-Amino-4-hydroxy-2-naphthalenesulfonic acid
  • CAS No.90-51-7
  • Chemical Name:6-Amino-4-hydroxy-2-naphthalenesulfonic acid
  • CBNumber:CB4443007
  • Molecular Formula:C10H9NO4S
  • Formula Weight:239.25
  • MOL File:90-51-7.mol
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)
  • FDA UNII 0PLB93P56X
  • EPA Substance Registry System 2-Naphthalenesulfonic acid, 6-amino-4-hydroxy- (90-51-7)
  • UNSPSC Code 12352100
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
  • NFPA 704:
    0
    3 0
Hazard and Precautionary Statements (GHS)
  • Symbol(GHS)
  • Signal wordDanger
  • Hazard statements H315-H319-H314
  • Precautionary statements P280-P305+P351+P338-P310-P264-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313
6-Amino-4-hydroxy-2-naphthalenesulfonic acid Price More Price(1)
  • Brand: TCI Chemicals (India)
  • Product number: A0371
  • Product name : 6-Amino-4-hydroxy-2-naphthalenesulfonic Acid
  • Purity: 
  • Packaging: 25G
  • Price: ₹3500
  • Updated: 2022/05/26
  • Buy: Buy

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
Preparation Products
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6-Amino-4-hydroxy-2-naphthalenesulfonic acid Spectrum
90-51-7, 6-Amino-4-hydroxy-2-naphthalenesulfonic acidRelated Search:
  • Intermediates of Dyes and Pigments
  • Organics
  • Intermediates
  • Sulfur Compounds
  • Sulfonic/Sulfinic Acids
  • Organic Building Blocks
  • Chemical Synthesis
  • Building Blocks
  • 化工中间体
  • 医用原料
  • 高端化学
  • 染料中间体
  • 医药原料药
  • 化工原料
  • 原料药
  • 药物杂质及中间体
  • 生化试剂
  • 有机砌块
  • 亚磺酸盐
  • 磺酸
  • 原料
  • SULFONIC ACID
  • Building Blocks
  • Sulfonic/Sulfinic Acids
  • Sulfur Compounds
  • Organic Building Blocks
  • C10H9O4NS
  • H2NCd0H5OHSO3H
  • 2-氨基-8-萘酚-6-磺酸 Γ酸、伽玛酸、GAMMA酸、加买酸
  • 2-氨基-8-萘酚-6-磺酸(伽玛酸)
  • 2-苯并噁吖啉酮
  • 伽玛酸
  • GAMMA酸
  • 2-氨基-8-萘酚-6-磺酸(γ酸)
  • 加买酸
  • γ酸
  • 伽马酸
  • Γ-酸
  • 6-氨基-4-羟基-2-萘磺酸
  • 伽玛酸,GAMMA酸,Γ酸
  • 6-氨基-4-羟基萘-2-磺酸
  • 2-氨基-8-萘酚-6-磺酸
  • 7-氨基-1-萘酚-3-磺酸
  • Gamma 酸
  • 90-51-7
  • 6-Amino-4-hydroxynaphthalin-2-sulfonsure
  • 90-51-7 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
  • 2-Amino-8-naphthol-6-sulfonic acid ( gamma Acid )
  • 6-Amino-4-hydroxy-2-naphthalenesulfonic acid ISO 9001：2015 REACH
  • 6-Amino-4-hydroxy-2-naphthalenesulfonic Acid &gt
  • 6-Amino-4-hydroxy-2-naphthalenesulfonic acid OR 2-Amino-8-hydroxynaphthalene-6-sulfonic acid
  • 2-Amino-8-naphthol-6-sulfonic acid (γ acid)
  • 6-amino-4-hydroxynaphthalene-2-sulphonic acid
  • yacid
  • c.i.developer3
  • aminonaphtholsulfonicacidgamma
  • 7-amino-1-naphthol-3-sulfonicaci
  • 6-Amino-4-hydroxynaphthalene-2-sulfonicacid

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