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Acid Red 137

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Acid Red 137 Basic information

Product Name:
Acid Red 137
Synonyms:
  • sodium 7-(acetylamino)-3-[[4-(acetylamino)phenyl]azo]-4-hydroxynaphthalene-2-sulphonate
  • Acid red 137 (C.I. 17755)
  • Scarlet A
  • Blackley Fast Paper Scarlet N
  • Acid Red 137 ISO 9001:2015 REACH
  • C.I.Acid Red 137:C.I.17755
  • 2-Naphthalenesulfonic acid, 7-(acetylamino)-3-[2-[4-(acetylamino)phenyl]diazenyl]-4-hydroxy-, sodium salt (1:1)
CAS:
6222-63-5
MF:
C20H18N4O6S.Na
MW:
465.44
EINECS:
228-307-7
Mol File:
6222-63-5.mol
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Acid Red 137 Usage And Synthesis

Preparation

N-(4-aminophenyl)acetamide diazo, and ?7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications

yellow light red. Soluble in water for red, red orange for adequate soluble in alcohol. The strong sulfuric acid for product red, diluted into yellow orange. In water solution to join after strong hydrochloric acid red brown precipitation; Add thick sodium hydroxide solution into a yellow brown.

Standard Light Fastness Soaping Persperation Fastness Oxygen bleaching Fastness to seawater
Fading Stain Fading Stain Fading Stain
AATCC 5

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