Acid Yellow 11 Appearance is yellow powder. Soluble in water, ethanol, acetone and cellosolve, soluble in ethanol, yellow, slightly soluble in benzene, insoluble in other organic solvents. Yellow in concentrated sulfuric acid, still yellow after dilution; It is also yellow after nitric acid. The aqueous solution is added with 10% sulfuric acid or sodium hydroxide. There is no change in the color of copper ions when dyeing, and the iron ions are darker.
TRADE NAME:Acid Yellow G,Acid Brilliant Yellow 2R,Acid Yellow 2GL,Egacid Yellow G,Kanasol brilliant G,Midget brilliant yellow G
Leveing(grade) | displacement | whitening | Solubility(g/L) | metal ion effect(grade) | ||
copper | iron | chromium | ||||
4~5 | — | well | 100(90℃) | 2~3 | 3 | — |
Test Methods | fiber | Alkali resistance | Carbonization | Chlorination discoloration | Oxygen bleaching | Alkali fluff color change | Acid fluff color change | potting | soaping | Perspiration | Sun exposure | |
discolor | Staining | |||||||||||
AATCC | wool | 5 | 4~5 | — | 1 | 2 | — | — | 2 | 2 | 1 | 6~7 |
ISO | wool | 4 | 4~5 | 4 | 2 | 1~2 | 2 | 2 | 1~2 | 2 | 2~3 | 5~6 |
Acid Yellow 11 can directly on the wool fabric printing and dyeing leather, and can be made into color which. On paper surface shading, can also be used in paint, medicine and cosmetics of shading.
Acid Yellow 11 works best on protein fibers (wool, silk) and polyamide (nylon) where acid dyeing chemistry is applicable. It binds ionically to cationic sites on these fibers when the dye bath is kept in the recommended acidic pH range. It is not effective on untreated polyester or acrylics without special pre-treatment.
Begin trials with a typical liquor ratio of 20:1–10:1. Adjust pH to the acid dye range (commonly pH 3–5 using acetic acid or citric acid) and heat gradually to the recommended temperature for the fiber (e.g., 60–90°C for wool/nylon depending on process). Start with a low test dose (e.g., 0.5–1.0% o.w.f.) and measure exhaustion and shade before scaling up.
Wet fastness often improves with proper after-soaping, use of fixing/leveling aids, and optimized dyeing conditions. Lightfastness for acid yellows can be moderate; improvement strategies include selecting darker shades or mixes with more lightfast co-dyes, and applying UV absorbers or protective topcoats in finishing if the end-use requires higher light resistance.
As with all commercial dyes, handle Acid Yellow 11 using standard industrial hygiene: gloves, eye protection, and dust control. Consult the product's Safety Data Sheet (SDS) for specific hazards, storage, and disposal instructions. Also verify compliance with regional regulations (e.g., azo-related restrictions, REACH, or local regulations) before using the dye in consumer goods.
Yes — Acid Yellow 11 mixes with many acid and metal-complex acid dyes to create custom yellow, green or orange shades. Perform small scale trials to evaluate hue shift and fastness properties; when blending, consider compatibility and any effect on fastness and leveling.
Typically supplied in sealed drums or bags to protect from moisture. Store in a cool, dry place away from direct sunlight and strong oxidizing agents. Follow manufacturer packaging and shelf-life guidance printed on the label.
