Acid Black 31
Name:C.I.Acid Black 31,C.I.17580
Molecular Structure: Single azo class
C.I.Acid Black 31,C.I.17580,CAS 6222-55-5,516.46,C23H17N4NaO7S,Weak Acid Black 2B,Weak Acid Black BG
Molecular Formula:C23H17N4NaO7S
Molecular Weight: 516.46
CAS Registry Number:6222-55-5
Manufacturing Methods : 2-Methoxy-4-nitrobenzenamine diazo, in acid conditions and 4-Hydroxy-6-(phenylamino)naphthalene-2-sulfonic acid coupling.
Properties and Applications: blue and black. Blue-ray black powder. Soluble in water for purple to blue-black, soluble in ethanol for purple. The strong sulfuric acid are purple to blue-black, a grey purple diluted. Its water solution and strong hydrochloric acid for violet black; Add thick as a hydrogen oxidation solution tresses. Mainly used for wool fabric and wool/rayon blended fabric dyeing, pitch-black degree good, high fastness. Also used in leather dyeing.
| Standard | Light Fastness | Soaping | Persperation Fastness | Oxygen bleaching | Fastness to seawater | |||
| Fading | Stain | Fading | Stain | Fading | Stain | |||
| ISO | 6 | 3 | 3 | 4 | 2 | 4-5 | ||
| AATCC | 6 | 3-4 | 3-4 | 4-5 | 1 | 4-5 | ||
List of Suppliers:
Weak Acid Black 2B,Weak Acid Black BG
Hangzhou Xiasha Hengsheng (Sunshine) Chemicals Co.,Ltd.
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