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
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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