dye|World dye variety

Name:C.I.Acid Blue 81,C.I.64510/64515

Molecular Structure: anthraquinones

C.I.Acid Blue 81,C.I.64510/64515,CAS 8005-76-3,782.35/810.40,C36H26Br2N4Na2O8S2/C28H20Br2N4Na2O8S2/C29H23Cl2N4NaO5S/C28H20Cl2N4Na2O8S2

Molecular Formula:C₃₆H₂₆Br₂N₄Na₂O₈S₂/C₂₈H₂₀Br₂N₄Na₂O₈S₂/C₂₉H₂₃Cl₂N₄NaO₅S/C₂₈H₂₀Cl₂N₄Na₂O₈S₂

Molecular Weight: 782.35/810.40

CAS Registry Number:8005-76-3

Manufacturing Methods :  (C.I. 64510) department is 1,5-Diaminoanthraquinone bromine into 1,5- diamino-2 ,4,6,8- tetrachloro-anthraquinone, then and  p-Methylaniline condensation, stlfonation, and translated into sodium salt. Note: aniline and m-Toluidine similar products. (C.I. 64515) department is anthraquinone two nitration for 1,5-Dinitroanthracene-9,10-dione and 1,8-Dinitroanthracene-9,10-dione mixture, then reduction, chlorinated into four chlorine derivatives, again with a condensation of p-Methylaniline, stlfonation, and translated into sodium salt.

Properties and Applications: dark green light blue. Red light dark blue powder, fights for sensitive, not soluble in cold water, slightly soluble in hot water (red light blue), slightly soluble in ethanol and a bright blue. The strong sulfuric acid for red, dilute to blue. Its water solution to join sodium hydroxide have dark purple precipitation.

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