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1,8-Dihydroxynaphthylene-3,6-disulfonic acid

1,8-Dihydroxynaphthylene-3,6-disulfonic acid Suppliers list
Company Name: Hebei Zhuanglai Chemical Trading Co.,Ltd
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Products Intro: Product Name:Chromotropic Acid
CAS:148-25-4
Purity:99% Package:1kg;180USD
Company Name: Shanghai Daken Advanced Materials Co.,Ltd
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Products Intro: Product Name:1,8-Dihydroxynaphthylene-3,6-disulfonic acid
CAS:148-25-4
Purity:99% Package:100g ;1KG ;5KG 25KG
Company Name: Henan Tianfu Chemical Co.,Ltd.
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Products Intro: Product Name:148-25-4
CAS:148-25-4
Purity:99% Package:25KG;5KG;1KG
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Products Intro: Product Name:1,8-Dihydroxynaphthylene-3,6-disulfonic acid
CAS:148-25-4
Purity:99% Package:1KG;1USD
Company Name: Hubei Jusheng Technology Co.,Ltd.
Tel: 18871490254
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Products Intro: Product Name:chromotropic acid
CAS:148-25-4
Purity:99% Package:5KG;1KG Remarks:C10H8O8S2

1,8-Dihydroxynaphthylene-3,6-disulfonic acid manufacturers

  • Chromotropic Acid
  • Chromotropic Acid pictures
  • $180.00 / 1kg
  • 2024-06-06
  • CAS:148-25-4
  • Min. Order: 1kg
  • Purity: 99%
  • Supply Ability: 20ton
1,8-Dihydroxynaphthylene-3,6-disulfonic acid Basic information
Product Name:1,8-Dihydroxynaphthylene-3,6-disulfonic acid
Synonyms:4,5-dihydroxy-7-naphthalenedisulfonicacid;7-Naphthalenedisulfonicacid,4,5-dihydroxy-2;Chrmotropicacid;4,5-Dihydroxy-2,7-naphthalene disulfonic acid 1,8-Dihydroxynaph-thalene-3,6-disulfonic acid;4,5-DIHYDROXY-2,7-NAPHTHALENEDISULFONIC ACID;4,5-dihydroxynaphthalene-2,7-disulphonic acid;1,8-DIHYDROXYNAPHTHALENE-3,6-DISULFONIC ACID;1,8-DIHYDROXYNAPHTHYLENE-3,6-DISULFONIC ACID
CAS:148-25-4
MF:C10H8O8S2
MW:320.3
EINECS:205-712-7
Product Categories:Intermediates of Dyes and Pigments
Mol File:148-25-4.mol
1,8-Dihydroxynaphthylene-3,6-disulfonic acid Structure
1,8-Dihydroxynaphthylene-3,6-disulfonic acid Chemical Properties
Boiling point 429.2°C (rough estimate)
density 1.7929 (rough estimate)
refractive index 1.6000 (estimate)
storage temp. Inert atmosphere,Room Temperature
pka-0.51±0.40(Predicted)
CAS DataBase Reference148-25-4(CAS DataBase Reference)
EPA Substance Registry System2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy- (148-25-4)
Safety Information
HS Code 29089990
MSDS Information
1,8-Dihydroxynaphthylene-3,6-disulfonic acid Usage And Synthesis
Chemical Properties4,5-Dihydroxynaphthalene-2,7-disulfonic acid [148-25-4]. (1,8-dihydroxynaphthalene-3,6-disulfonic acid), chromotropic acid, C10H8O8S2, Mr 320.3: the disodium salt is readily soluble in water. Alkali fusion yields 1,3,8-trihydroxynaphthalene-6-sulfonic acid. Diazo coupling occurs in the 3- and 6-positions.
UsesChromotropic acid is used as an analytical reagent and as a coupling component for a wide range of azo dyes, e.g., C.I. Acid Violet 6, C. I. Mordant Blue 13, and C.I. Direct Blue 84.
DefinitionChEBI: A naphthalenesulfonic acid that is naphthalene-2,7-disulfonic acid substituted by hydroxy groups at positions 4 and 5.
Production Methods2-Hydroxynaphthalene-3,6,8- trisulfonic acid total liquor is concentrated and heated with caustic soda liquor to 158℃ for 20 – 30 h . The melt is diluted with water and poured into excess hydrochloric acid. Salt is added, sulfur dioxide expelled, and the mixture cooled to precipitate the product as the disodium salt in 88 % yield.
An alternative process is based on direct fusion (caustic liquor at 228℃ under pressure) of 1-aminonaphthalene-3,6,8-trisulfonic acid to chromotropic acid without isolating the intermediate oxy Koch acid.
Tag:1,8-Dihydroxynaphthylene-3,6-disulfonic acid(148-25-4) Related Product Information
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