Acid Green 25 Appearance is green powder. Soluble in water, the solution has no tendency to aggregate at room temperature, soluble in o-chlorophenol, slightly soluble in acetone, ethanol, pyridine, insoluble in chloroform, toluene. The dye is dark green in concentrated sulfuric acid, diluted It turns into emerald blue; it is brown in concentrated nitric acid. The aqueous solution is blue, hydrochloric acid is blue, and sodium hydroxide is blue-green.
TRADE NAME:Acid Green G,Acid Green GS,Acid Green P-3B,Acid Green P-GSL,Akacid Alizarine Cyanine Green G,Alizarine Brilliant Green G,Alizarine Cyanine Green 38008,Alizarine Cyanine Green 38016,Alizarine Cyanine Green 90128,Alizarine CyanineGreen [G],Alizarine Cyanine Green [G],Alizarine Cyanine Green G-AF,Alizarine Cyanine Green GHN,Alizarine Fast Green CGN EX Conc,Alizarine Fast Green J,Alizarine Green U 308220,Basovit Green 876,Weak Acid Green GS,Weak Acid Green AGS,Neutral Green GK,VibraColor Green AGR25
Standard | Fiber | Soaping | Persperation Fastness | Oxygen bleaching | Light | |
Fading | Stain | |||||
AATCC | Wool | 4 | 4 | 3 | 3 | 5 |
ISO | Wool | 3 | 2 | 4 | 2 | 6 |
Leveling(grade) | Displacement | Whitening | Solubility(g/L) | Metal ion effect(grade) | ||
copper | iron | chromium | ||||
3~4 | B | bad | 30(90℃) | 4Y | 4Y | 4Y |
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 | 4 | 5 | — | 3 | 3~4 | 3~4 | — | — | — | — | 4 | 4 | 3 | 5 |
ISO | wool | 4~5 | 3 | 3 | 2 | 1 | 1 | 3 | 1 | 2 | 1 | 3 | 2 | 4 | 6 |
Fixing situation | soaping ISO105-C03 (60℃) | Alkali perspiration ISO105-E04 | Flooding ISO105-E01 | Chlorine water ISO105-E03 | Sun exposure ISO105-B02 | |||||||
discolor | Nylon stain | Cotton stain | discolor | Nylon stain | Cotton stain | discolor | Nylon stain | Cotton stain | 100mg/L Effective chlorine | Standard staining depth | ||
1/12 | 1/1 | |||||||||||
Unfixed | 4~5 | 4~5 | 5 | 5 | 3~4 | 4~5 | 4~5 | 4 | 4~5 | 4 | 5~6 | 6~7 |
Fixing | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4~5 | ||
Used for wool, polyamide, silk and their blended fabric dyeing and printing. Can also be used in leather, paper, cosmetics, soap, wood, electrical-controlled aluminum and biological color.
Acid Green 25 performs best on protein fibres (wool, silk) and on polyamide (nylon) under acidic dyeing conditions. It gives the most reliable, even shades on pre-scoured fibres with proper acidification of the dyebath.
To improve leveling on nylon, prewet the fabric thoroughly, add a small amount of a non-ionic wetting agent and introduce the dye slowly at a controlled temperature rise. Using a mild leveling agent and holding the temperature at the dyeing plateau for sufficient time reduces streaking and patchiness.
Acid Green 25 generally shows moderate lightfastness—adequate for indoor textiles, garments, and decorative items. For outdoor or high-exposure applications, consider post-dye UV stabilizers, protective topcoats, or selecting a dye with higher rated lightfastness.
Rinsing thoroughly, soaping with a mild detergent at recommended temperatures, and applying a suitable cationic fixing agent or mild crosslinking finish can improve wet-fastness. Avoid harsh oxidizing bleaches which will alter the shade.
Common compatible auxiliaries include non-ionic wetting agents, mild leveling agents, acidifying agents (acetic or citric acid for pH control), and mild dispersants for ink formulations. Always test compatibility at lab scale before scale-up.
Store in a cool, dry area away from strong oxidizers. Keep containers tightly closed. Use appropriate PPE (gloves, eye protection) during handling and avoid inhalation of dust—dissolve in water before addition to dye baths whenever possible.
Prepare small lab dyebaths using pre-scoured swatches, control pH with acetic/citric acid, and run incremental temperature increases to the target dyeing plateau. Record liquor ratio, temperature profile, and time to replicate successful runs at larger scale.
