C.I. Direct Yellow 21
- Product Name
- C.I. Direct Yellow 21
- CAS No.
- 1325-46-8
- Chemical Name
- C.I. Direct Yellow 21
- Synonyms
- Direct Yellow 21;C.I. Direct Yellow 21;C.I.Direct Yellow 21:C.I.40045
- CBNumber
- CB54758791
- Formula Weight
- 0
- MOL File
- Mol file
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C.I. Direct Yellow 21 Chemical Properties,Usage,Production
Preparation
(E)-2-(2-sulfo-4-nitrostyryl)-5-nitrobenzenesulfonic acid sodium sodium hydroxide solution together with aniline backflow heating.
Properties and Applications
soluble in water to pure yellow, slightly soluble in ethanol for yellow. The strong sulfuric acid in red orange for, for the yellow brown after diluted, precipitation. The dye solution to join a light yellow brown hydrochloric acid precipitation; Add sodium hydroxide have orange precipitation.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 5 | 3 | 2 | 3 | 3-4 | ||
C.I. Direct Yellow 21 Preparation Products And Raw materials
Raw materials
Preparation Products
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C.I. Direct Yellow 21 Suppliers
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