Acid Yellow 42
1. Molecular formula: C32H24N8Na2O8S2 |
2. Molecular weight: 758.69 |
3. Structure formula: |
4. CAS NO.:6375-55-9 |
5. Appearance: Yellow powder. |
6. Specification: Strength 150%, crude |
7. Usage: Mainly used in dyeing of wool and worsted goods. |
8. Packing, storage and transportation: Packed with 25KG cartons, allows to be tansported by the general means. |
Properties and Applications
Acid Yellow 42
Yellow to red light yellow. Bright yellow powder. A lemon yellow soluble in water, soluble in ethanol is lemon yellow, slightly soluble in acetone. Meet strong sulfuric acid is lemon yellow, dilute still is shown after lemon yellow. Its water solution meet strong hydrochloric acid is lemon yellow; Sodium hydroxide solution meet strong a lemon yellow. In dyeing of copper (a little red dark, encounter chromium ion unchanged, encounter iron ion turn green dark. Mainly used for wool dyeing and can be used for wool, silk and glue directly printing, has the good discharge sex, can be used for the polyamide fiber dyeing and leather shading.
| Standard | Light Fastness | Soaping | Persperation Fastness | Oxygen bleaching | Fastness to seawater | |||
| Fading | Stain | Fading | Stain | Fading | Stain | |||
| ISO | 4-5 | 4-5 | 5 | 4-5 | 4 | 5 | 4 | 5 |
| AATCC | 4 | 4-5 | 4-5 | 4-5 | 1 | 2-3 | 4-5 | 4-5 |
Acid Yellow 42
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