Direct Red 144
Name:C.I.Direct Red 144,C.I.17830
Molecular Structure: Single azo class
C.I.Direct Red 144,C.I.17830,CAS 6492-66-6,713.63,C33H25N5Na2O9S
Molecular Formula:C33H25N5Na2O9S
Molecular Weight: 713.63
CAS Registry Number:6492-66-6
Manufacturing Methods : 3-Methyl-4-amino-3-carboxy-4′-hydroxybenzanilide diazo, and 7-(4-Amino-3-methylbenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications: red. Slightly soluble in water and red to blue light for Claret, soluble in ethanol for red orange. The strong sulfuric acid to red light purple, diluted red for quality. The dye solution with strong hydrochloric acid have Red sauce precipitation; Add thick sodium hydroxide solution for product red.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 3 | 3 | 3 | 3-4 | 3-4 | ||
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