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Acid Blue 81

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

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.

Standard Light Fastness Soaping Persperation Fastness Oxygen bleaching Fastness to seawater
Fading Stain Fading Stain Fading Stain
ISO 5-6 2 3 4 2 4
AATCC 5-6 2-3 3-4 5 3

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