Direct Yellow 49
Name:C.I.Direct Yellow 49,C.I.29035
Molecular Structure: Double azo class
C.I.Direct Yellow 49,C.I.29035,CAS 6420-30-0,612.5,C29H22N6Na2O7,Direct Fast Yellow G
Molecular Formula:C29H22N6Na2O7
Molecular Weight: 612.5
CAS Registry Number:6420-30-0
Manufacturing Methods : 3-Aminobenzoic acid diazo, and (2-Methoxyphenylamino)methanesulfonic acid coupling, then the water with sulfonic acid base, and then to light gasification.
Properties and Applications: yellow. Yellow brown powder. Soluble in water solution for green light yellow, and adequate soluble in alcohol. The strong sulfuric acid dyes for product red to red light purple, diluted into a weak yellow light olive. The dye solution to join strong hydrochloric acid for dark brown, and precipitation; Add thick after sodium hydroxide solution colored light unchanged, precipitation. Water-soluble, sensitive fights. Dyeing meet copper, iron ion colored light basically unchanged, more sensitive to that fights. Used for cotton, viscose, silk, rayon blended dyeing, but not used for printing. Also used for paper, leather dyeing
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| AATCC | 3 | 5 | 4 | 2 | 2 | ||
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I want to import direct dyes for that i want to know the structures of all direct dyes.copying one by one from this website is very difficult.please kindly send me their “list of colour index numbers with structures of direct dyes” because it is an open material.if you can please do me a favour….thanks you so much.