Direct Orange 27
Name:C.I.Direct Orange 27,C.I.40066
Molecular Structure: Stilbenes
Molecular Formula:
Molecular Weight:
CAS Registry Number:1325-50-4
Manufacturing Methods : 2-Methyl-5-nitrobenzenesulfonie acid sodium hydroxide solution at reflux under heating together with Benzene-1,4-diamine, the molecular ratio of 1:1.
Properties and Applications: dark red light orange. Soluble in water for gold orange, slightly soluble in alcohol. For the strong sulfuric acid in purplish Red, Red sauce for diluted. The dye solution with strong hydrochloric acid have dark purple precipitation; Add thick sodium hydroxide solution have orange brown precipitation.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 1 | 4 | 3 | 2 | 1-2 | ||
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