Direct Violet 7
Name:C.I.Direct Violet 7,C.I.27855
Molecular Structure: Double azo class
C.I.Direct Violet 7,C.I.27855,CAS 6227-10-7,703.70,C32H27N5Na2O7S2,Violet FFR,Direct Brilliant Fast Violet 2RL,Violet 3R
Molecular Formula:C32H27N5Na2O7S2
Molecular Weight: 703.70
CAS Registry Number:6227-10-7
Manufacturing Methods : 2-Amino-3,5-dimethylbenzenesulfonic acid diazo, and 2,5-Dimethylbenzenamine coupling, its product to diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling.
Properties and Applications: purple. Soluble in water for product red to red light purple, and adequate soluble in alcohol. The strong sulfuric acid for Tracy in blue, and in purple for diluted. The dye solution to join strong hydrochloric acid for blue purple, have precipitation; Add sodium hydroxide solution have strong purplish red precipitate.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4 | 4 | 3-4 | 1-2 | 1 | ||
| AATCC | 4 | 4 | 4 | 1 | 1 | ||
List of Suppliers:
ABCOL Violet FFR ( Abbey Color Inc. )
Atul Direct Brilliant Fast Helio 2R( Atul Limited )
Atul Leather Helio D2R( Atul Limited )
Bitafast Violet 2RL ( Bharat Texdyes Industries )
Classic Direct Violet 7(Classic Dyestuffs Inc)
Direct Brilliant Fast Violet 2RL ( Golden Dyes Corpn (India) Pvt Ltd )
Direct Fast Helio 2R (Amar Impex)
Direct Violet 3R ( Chemi-Dyestuffs Industries (Pvt) Ltd )
Fast Violet 2RL( Liberty Exports Ltd )
Pyrazol Violet 3R( Clariant GmbH )
Sandal Direct Violet 3R( Sandal Dyestuff Industries (Pvt) Ltd )