C.I. Acid Red 81
- CAS NO.：6846-33-9
- Empirical Formula: C23H15N2NaO5S
- Molecular Weight: 454.43037
What is C.I. Acid Red 81?
Preparation
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 | ||
Safety information for C.I. Acid Red 81
C.I. Acid Red 81 manufacturer
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