Direct Orange 4
Direct Orange 4 Basic information
- Product Name:
- Direct Orange 4
- Synonyms:
-
- 4,4'-Bis[(2,4-diamino-5-nitrophenyl)azo]-1,1'-biphenyl-3,3'-disulfonic acid disodium salt
- C.I.22920
- C.I.Direct Orange 4
- Direct Orange 4
- C.I.Direct Orange 4:C.I.22920
- CAS:
- 3626-38-8
- MF:
- C24H21N10NaO10S2
- MW:
- 696.6
- Mol File:
- 3626-38-8.mol
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Direct Orange 4 Usage And Synthesis
Preparation
4,4′-Diamino-3,3′-Biphenyldisulfonic acid?double nitriding, and 4-Nitrobenzene-1,3-diamine (2 Moore) coupled.
Properties and Applications
bright orange. Moderate soluble in water for palm light orange, slightly soluble in ethanol for golden brown. The strong sulfuric acid for golden brown. After diluted for orange brown. The dye solution to join strong hydrochloric acid for orange heavy red light brown, have precipitation; Add thick sodium hydroxide solution for orange light brown, have precipitation. Can be used for cotton dyeing, good levelness. Neutral and alkaline white good to very good.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4 | 4 | 3 | 2 | 2 | ||