C.I.68200
Acid Red 81
C.I. Acid Red 81
C.I.Acid Red 81:C.I.68200
4-[(2,7-Dihydro-3-methyl-2,7-dioxo-3H-dibenz[f,ij]isoquinolin-6-yl)amino]benzenesulfonic acid sodium salt
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.
