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Mordant Black 74

Name:C.I.Mordant Black 74,C.I.27740

Molecular Structure: Double azo class

C.I.Mordant Black 74,C.I.27740,CAS 6227-06-1,789.66,C30H18N5Na3O11S3,Autazol Chrome Black BA

C.I.Mordant Black 74,C.I.27740,CAS 6227-06-1,789.66,C30H18N5Na3O11S3,Autazol Chrome Black BA

Molecular Formula:C30H18N5Na3O11S3

Molecular Weight: 789.66

CAS Registry Number:6227-06-1

Manufacturing Methods : 8-Amino-4-hydroxynaphthalene-2-sulfonic acid diazotization, and 8-Aminonaphthalene-2-sulfonic acid coupling, product to diazotization, in alkaline condition and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications: blue black (dichromate treatment). Soluble in water for purple black, not soluble in ethanol. In concentrated sulfuric acid to green light blue, dilution after red light blue. Dye aqueous solution to join concentrated hydrochloric acid have red light blue precipitation; Join concentrated sodium hydroxide solution for red light blue, precipitation.

Standard Ironing Fastness Light Fastness Fulling Persperation Fastness Soaping Water
Alkali Acid
ISO 4 6-7 4-5 5 4-5 5

List of Suppliers:

Autazol Chrome Black BA( IG Farbenindustrie AG )


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