Acid yellow 25 is Yellow powder, Soluble in water yellow, encounter cold becomes muddy. Slightly soluble in ethanol and acetone. Meet strong sulfuric acid is yellow, the generation after diluted fluorescent yellow precipitation. Its water solution meet sodium hydroxide solution without change. Mainly used for wool and polyamide fiber of printing and dyeing.
Acid yellow 25 dye is yellow in water, cold and turbid, and the solubility in water is 150g/L (90°C). It is slightly soluble in ethanol and acetone. It is yellow in concentrated sulfuric acid solution and has a fluorescent yellow precipitate after dilution. The aqueous solution did not change with sodium hydroxide.
Acid Yellow RN,Acid Yellow RPL,Acid Yellow E-2PL,Acid Yellow E-RPL,Weak Acid Yellow RN,Aminyl Yellow E-RL,Apollo Nylon Fast Yellow L-RPL,Dorasyn Yellow AGRL,Duramine Yellow RP,Egacid Yellow R,Nylosan Yellow E-RPL,Rifa Acid Fast Yellow E-RPL,Suminol Fast Yellow R
can be used for leather and electrochemical aluminum shading, occasionally used for paper coating.
| Standard | Fiber | Soaping | Persperation Fastness | Oxygen bleaching | Light Fastness | |
| Fading | Stain | |||||
| AATCC | Wool | 4 | 4 | 3-4 | 1 | 6-7 |
| ISO | Wool | 2 | 4 | 3 | 1 | 5-6 |
Test Methods | fiber | Alkali resistance | Carbonization | potting | Chlorination discoloration | Oxygen bleaching | Alkali fluff | Acid fluff | soaping | Perspiration | Sun exposure | |||
discolor | Staining | discolor | Staining | discolor | Staining | |||||||||
AATCC | wool | 4 | 4~5 | 5 | 2 | 1 | 3~4 | 3~4 | — | — | 4 | 4 | 3~4 | 6~7 |
ISO | wool | 5 | 4~5 | 5 | 4~5 | 1 | 1 | 1 | 1 | 4~5 | 2 | 4 | 3 | 5~6 |
Acid Yellow 25 is optimized for protein fibers (wool, silk) and polyamide (nylon). It gives the brightest, most reliable results on wool and nylon; polyester requires disperse dyes instead.
No mordant is required. Acid dyes like Acid Yellow 25 bind to positively charged sites on fibers under acidic conditions (pH 2–5), so acidification of the dyebath (acetic or formic acid) is the normal fixation method.
Yes — it mixes well with other acid dyes for shade modification. For predictable results, combine dyes with similar exhaustion and fastness properties and perform compatibility checks (lab dyeing and fastness tests) before production runs.
