Acid Violet 7 Appearance is dark red powder. It is soluble in water and blue-red, slightly soluble in ethanol and acetone, insoluble in other organic solvents. It is blue-red in concentrated sulfuric acid and bright red after dilution; it turns orange when concentrated nitric acid is reddish solution When dyeing, it encounters copper and iron ions, and its color is slightly darker, while the latter is slightly shallower; chromium ions have little effect on it.
Acid magenta 6B,Acid Rubine 6B
Used for coloring wool, silk, nylon and leather, paper, soap, wood, medicine and cosmetics, and can also be used for biological dyeing.
CI.NO: 18055
Leveling(grade) | Displacement | Whitening | Solubility(g/L) | Metal ion effect(grade) | ||
copper | orin | chromium | ||||
1 | B | well | 50(90℃) | 3~4 | 3 | 3~4D |
Test Methods | fiber | Alkali resistance | Carbonization | Chlorination discoloration | Oxygen bleaching | Alkali fluff | Acid fluff | potting | soaping | Perspiration | Sun exposure | ||||
discolor | Staining | discolor | Staining | discolor | Staining | discolor | Staining | ||||||||
AATCC | wool | 3~4 | 3 | — | 1 | 2 | 2 | — | — | — | — | 2 | 2 | 1 | 4 |
ISO | wool | 3~4 | 3 | 2 | 1 | 1 | 5 | 1 | 1 | 2 | 1 | 2 | 4 | 2~3 | 4 |
Acid Violet 7 shows strongest performance on protein fibres (wool, silk) and polyamide (nylon). It has limited direct affinity for cotton and most cellulosic fibres unless used with a mordant or after a chemical modification; for cellulose applications consider reactive or direct dyes instead.
Wash and wet fastness on protein fibres are generally good when dyeing and fixation are performed correctly. Lightfastness for violet acid dyes tends to be moderate—acceptable for many indoor/apparel uses but may not be ideal for prolonged outdoor exposure. Test finished samples under intended end-use conditions.
Yes—Acid Violet 7 is commonly formulated into acid printing pastes and adjusted for continuous dyeing on polyamide and wool. Viscosity, acid level and fixation step must be optimized per process. Work with your paste and process suppliers to adjust rheology and fixation profiles.
