C.I. Direct Yellow 21
C.I. Direct Yellow 21 Basic information
- Product Name:
- C.I. Direct Yellow 21
- Synonyms:
-
- C.I. Direct Yellow 21
- Direct Yellow 21
- C.I.Direct Yellow 21:C.I.40045
- CAS:
- 1325-46-8
- MW:
- 0
- EINECS:
- 603-622-6
- Mol File:
- Mol File
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C.I. Direct Yellow 21 Usage And Synthesis
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 | ||
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C.I. Direct Yellow 21(1325-46-8)Related Product Information
- Direct Yellow 19
- Direct Yellow 20
- Benzenesulfonic acid, 3,5-bis[(2,4-diamino-5-nitrophenyl)azo]-4-methyl-, monosodium salt
- Direct Yellow 24
- Direct Yellow 176
- DIRECT YELLOW 2
- Direct Yellow 173
- sodium 6-methyl-2'-[4-[[2-oxo-1-[(phenylamino)carbonyl]propyl]azo]phenyl][2,6'-bibenzothiazole]-7-sulphonate
- 6-Benzothiazolecarboxylic acid, 2-[4-[[2-oxo-1-[(phenylamino)carbonyl]propyl]azo]phenyl]-7-sulfo-, disodium salt