Mordant Red 21
Name:C.I.Mordant Red 21,C.I.17995
Molecular Structure: Single azo class
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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