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Acid Red 81

Name:C.I.Acid Red 81,C.I.68200

Molecular Structure: anthraquinones

C.I.Acid Red 81,C.I.68200,CAS 6846-33-9,454.43,C23H15N2NaO5S

C.I.Acid Red 81,C.I.68200,CAS 6846-33-9,454.43,C23H15N2NaO5S

Molecular Formula:C23H15N2NaO5S

Molecular Weight: 454.43

CAS Registry Number:6846-33-9

Manufacturing Methods :  1-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 Applications: colourful 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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