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4-aminonaphthalene-2-sulphonic acid

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4-aminonaphthalene-2-sulphonic acid Basic information

Product Name:
4-aminonaphthalene-2-sulphonic acid
Synonyms:
  • 4-aminonaphthalene-2-sulphonic acid
  • 4-Amino-2-naphthalenesulfonic acid
  • 2-Naphthalenesulfonic acid, 4-amino-
CAS:
134-54-3
MF:
C10H9NO3S
MW:
223.25
EINECS:
205-146-0
Mol File:
134-54-3.mol
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4-aminonaphthalene-2-sulphonic acid Chemical Properties

Density 
1.502±0.06 g/cm3(Predicted)
pka
-0.59±0.40(Predicted)
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4-aminonaphthalene-2-sulphonic acid Usage And Synthesis

Chemical Properties

1-Aminonaphthalene-3-sulfonic acid [134- 54-3]. (4-aminonaphthalene-2-sulfonic acid), C10H9NO3S, Mr 223.24, is only sparingly soluble in water, but its alkali-metal salts are readily soluble. Sulfonation with 20 % oleum yields 1-aminonaphthalene-3,5-disulfonic acid, and heating with water under pressure gives 1- hydroxynaphthalene-3-sulfonic acid, which can also be obtained by diazotization and acid hydrolysis of 1-Aminonaphthalene-3-sulfonic acid.

Production Methods

1-Aminonaphthalene-3,8-disulfonic acid in dilute sodium hydroxide solution is pumped at 40℃ through a special reactor that effects contact with continuously produced sodium amalgam. The resulting liquor is used directly for production of 1- hydroxynaphthalene-3-sulfonic acid.

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