What is Acid Yellow 49 CAS 12239-15-5?
Acid Yellow 49 CAS 12239-15-5 is a complex organic monoazo dye formulated as a water-soluble sulfonic acid derivative. It is manufactured through the precise diazo coupling of 4-amino-2,5-dichlorobenzenesulfonic acid with 3-methyl-1-phenyl-1H-pyrazol-5-amine. Characterized by its strong tinctorial strength and excellent leveling capabilities, it dissolves in aqueous solutions to yield a brilliant yellow hue. As a reliable industrial acid dye, it exhibits a strong affinity for natural protein fibers and synthetic polyamides, making it a critical commercial colorant for high-quality woven textiles and leather goods.
Specifications
| Item |
Value |
| Appearance |
Yellow powder |
| Colour Index |
18640 |
| Boiling Point |
613.74 °C (at 101,325 Pa) |
| Density |
1.62 g/cm3 (at 20 °C) |
| Water Solubility |
273.4 μg/L (at 25 °C) |
Features
- Brilliant Yellow Pigmentation – Delivers a high-strength, consistent brilliant yellow shade, ensuring deep dye penetration and uniform color distribution across targeted substrates.
- Excellent Dye Levelness – Possesses highly favorable leveling properties, making it extremely effective for achieving uniform, streak-free finishes on complex natural and synthetic fabric blends.
- Predictable Reactivity – Exhibits a slight darkening in color when exposed to copper or iron ions during the dyeing process, and can be effectively adsorbed and removed by specialized clays like bentone in industrial wastewater treatments.
Applications
- Textile Dyeing & Processing – Extensively applied in the commercial textile sector for the direct, high-quality dyeing of wool, silk, synthetic polyamide (nylon) fibers, and wool blended fabrics.
- Leather Manufacturing – Utilized as a highly dependable and stable commercial colorant for the deep, even shading and finishing of specialized leather goods.
- Industrial Coloration – Acts as a reliable yellow acid dye in various specialized commercial applications where consistent light fastness and brilliant pigmentation are required.
Packaging
Mikem offers flexible packaging options, including 25 kg of fiber drums for liquid products and 15–25 kg PP/PE bags for powder products, all customizable to meet your specific needs.
