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C.I. Acid Red 81

Basic information Safety Related Supplier
C.I. Acid Red 81 Basic information
C.I. Acid Red 81 Usage And Synthesis
  • Preparation1-Bromo-4-(N-methylacetamido)anthraquinone?condensation into 6-Bromo-3-methyl-3H-naphtho[1,2,3-de]quinoline-2,7-dione, then with aniline condensation, again with hair smoke sulphonated sulfuric acid, and translated into sodium salt.
  • Properties and Applicationscolourful red blue light. Soluble in alcohol. The strong sulfuric acid for blue-ray red, diluted into pink.
    Standard Light Fastness Soaping Persperation Fastness Oxygen bleaching Fastness to seawater
    Fading Stain Fading Stain Fading Stain
    ISO 5-6 3 3-4 3 2-3 3-4
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