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6-Amino-1-naphthalenesulfonic acid

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Company Name: Capot Chemical Co.,Ltd.
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Products Intro: Product Name:6-Amino-1-naphthalenesulfonic acid
CAS:81-05-0
Purity:98%(Min,HPLC) Package:100g;1kg;5kg,10kg,25kg,50kg
Company Name: Hubei Jusheng Technology Co.,Ltd.
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Products Intro: Product Name:6-Aminonaphthalene-1-sulfonic acid
CAS:81-05-0
Purity:99% Package:5KG;1KG
Company Name: Jinan Finer Chemical Co., Ltd
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Products Intro: Product Name:6-Amino-1-naphthalenesulfonic acid
CAS:81-05-0
Purity:>=99% Package:25KG;5USD
Company Name: Hubei xin bonus chemical co. LTD
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Products Intro: Product Name:6-Amino-1-naphthalenesulfonic acid
CAS:81-05-0
Purity:0.99 Package:5KG;1KG
Company Name: Shandong chuangyingchemical Co., Ltd.
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Products Intro: Product Name:6-Amino-1-naphthalenesulfonic acid
CAS:81-05-0

6-Amino-1-naphthalenesulfonic acid manufacturers

6-Amino-1-naphthalenesulfonic acid Basic information
Product Name:6-Amino-1-naphthalenesulfonic acid
Synonyms:6-aminonaphthalene-1-sulphonic acid;6-aminonaphthalene-1-sulfonic acid;6-azanylnaphthalene-1-sulfonic acid;Dahl's Acid 2-Naphthylamine-5-sulfonic Acid;6-Amino-1-naphthalenesulfonicAcid,95%;D ACID;BETA-NAPHTHYLAMINE-5-SULFONIC ACID;2-AMINONAPHTHALENE-5-SULFONIC ACID
CAS:81-05-0
MF:C10H9NO3S
MW:223.25
EINECS:201-318-4
Product Categories:Intermediates of Dyes and Pigments
Mol File:81-05-0.mol
6-Amino-1-naphthalenesulfonic acid Structure
6-Amino-1-naphthalenesulfonic acid Chemical Properties
density 1.3588 (rough estimate)
refractive index 1.6500 (estimate)
storage temp. under inert gas (nitrogen or Argon) at 2–8 °C
form powder to crystal
pka-0.33±0.40(Predicted)
color White to Light yellow to Light red
Water Solubility 0.33g/L(20 ºC)
Merck 14,6407
CAS DataBase Reference81-05-0(CAS DataBase Reference)
Safety Information
RIDADR 1759
HazardClass 8
PackingGroup III
HS Code 29269095
MSDS Information
ProviderLanguage
2-Amino-5-naphthalenesulfonic acid English
6-Amino-1-naphthalenesulfonic acid Usage And Synthesis
Chemical Properties2-Aminonaphthalene-5-sulfonic acid [81-05-0]. (6-aminonaphthalene-1-sulfonic acid), Dahl’s acid, Dressel acid, D acid, C10H9NO3S, Mr 223.24, crystallizes from water as needles although only 0.4 % soluble at 100℃. The sodium, calcium, and barium salts are moderately soluble in water. Bromination in acetic acid gives the 1-bromo derivative. Sulfonation with oleum gives a mixture of 2-aminonaphthalene-5,7-disulfonic acid together with some 1,5-disulfonic acid. Fusion with potassium hydroxide at 260℃ yields 6-amino-1-naphthol.
Production MethodsTobias acid is added to a mixture of sulfuric acid and oleum, and the reaction is completed by stirring for 12 h at 25℃. The resulting sulfonation mass, containing mainly 2-aminonaphthalene-1,5-disulfonic acid, is poured into water and heated at 105℃ for 3 h to desulfonate and precipitate the product which, after cooling, is filtered off; the yield is 95 %.
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