Name:C.I.Acid Yellow 49,C.I.18640
Molecular Structure: Single azo class
C.I.Acid Yellow 49,C.I.18640,CAS 12239-15-5,448.26,C16H12Cl2N5NaO3S,Weak acid Yellow GR,Weak acid Yellow NFC,Weak acid Yellow E-4G,Acid Yellow GR
Molecular Formula:C16H12Cl2N5NaO3S
Molecular Weight: 448.26
CAS Registry Number:12239-15-5
Manufacturing Methods : 4-Amino-2,5-dichlorobenzenesulfonic acid diazo, and 3-Methyl-1-phenyl-1H-pyrazol-5-amine coupling.
This applies to wool, silk, polyamide fiber and wool blended fabric dyeing, good levelness and also can be used for leather color.
| Standard | Light Fastness | Soaping | Persperation Fastness | Oxygen bleaching | Fastness to seawater |
| Fading | Stain | Fading | Stain | Fading | Stain |
| ISO | 5-6 | 2-3 | 3 | 3 | 3 | 3-4 | 3 | 2-3 |