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Mordant Red 21

Name:C.I.Mordant Red 21,C.I.17995

Molecular Structure: Single azo class

C.I.Mordant Red 21,C.I.17995,CAS 6417-36-3,770.74,C36H28N4Na2O9S2,Acid Mordant Red B,Acid Chrome Red B

C.I.Mordant Red 21,C.I.17995,CAS 6417-36-3,770.74,C36H28N4Na2O9S2,Acid Mordant Red B,Acid Chrome Red B

Molecular Formula:C36H28N4Na2O9S2

Molecular Weight: 770.74

CAS Registry Number:6417-36-3

Manufacturing Methods : 4-Amino-N-ethyl-N-(naphthalen-1-yl)benzarnide diazotization, and 4-Benzamido-5-hydroxynaphthalene-1,7-disulfonic acid coupling

Properties and Applications: brilliant blue light red. Product red powder. Soluble in water for red, moderate soluble in ethanol for magenta. In concentrated sulfuric acid for magenta, diluted into pink. Dye aqueous solution with concentrated hydrochloric acid for magenta; Join concentrated sodium hydroxide solution for orange brown. Mainly used for wool spinning and carpet industry. Post-mordant dyeing method have bright blue light red, the good fastness.

Standard Ironing Fastness Light Fastness Fulling Persperation Fastness Soaping Water
Alkali Acid
ISO 4 4-5 4 4 3 3 4-5
AATCC 5 4-5 3 4 4

List of Suppliers:

Acid Mordant Red B Rosi Company

Acid Chrome Red B (Sinochem Hebei Imp & Exp Corp)

Acid Chrome Red B (Nanjing Chemicals Import and Export Corp)

Chrome Red B(Sinochem Liaoning Import & Export Corporation)


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