Direct Red 145
Name:C.I.Direct Red 145,C.I.17805
Molecular Structure: Single azo class
C.I.Direct Red 145,C.I.17805,CAS 6771-94-4,685.57,C31H21N5Na2O9S
Molecular Formula:C31H21N5Na2O9S
Molecular Weight: 685.57
CAS Registry Number:6771-94-4
Manufacturing Methods : 2-Hydroxy-5-(4-aminobenzamido)benzoic acid diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications: colourful red yellow light. Soluble in water for orange brown, and adequate soluble in ethanol for orange. The strong sulfuric acid for quality in red, orange for gold after diluted. The dye solution to join strong hydrochloric acid for orange brown, have precipitation; Add thick sodium hydroxide solution for red light orange brown.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4-5 | 3 | 4 | 4 | 4-5 | ||
| AATCC | 4 | 3-4 | 3-4 | 4 | 4 | ||
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