ChemicalBook >?? ???? >?????4R
?????4R
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3,3′-Dimethylbenzidine double nitriding, first in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, and then and 4-Hydroxynaphthalene-1-sulfonic acid coupling.Properties and Applications
dark red light blue. Soluble in water for violet black, slightly soluble in ethanol for red light purple. The strong sulfuric acid for green light blue, diluted red for purple, have precipitation; In nitric acid for dark purple, and then into a red light purple. Dye with strong hydrochloric acid solution for purple, have precipitation; Add thick sodium hydroxide solution for purplish red color, have precipitation.| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4 | 4 | 1 | 1-2 | 2 | ||
| AATCC | 5 | 2-3 | 2 | 3 | 2 | ||
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| ??? | ?? | ??? | ?? | ?? ? | ?? |
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| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 |
market03@meryer.com | China | 40228 | 62 |
| Shaanxi DIDU pharmaceutical and Chemical Co., Ltd | 029-029-029-81148696 18161915376 |
1040@dideu.com | China | 9997 | 58 |
?????4R ?? ??:
2-???-5-???-7-?? ? 1-???-4-??? ??? ?
trisodium 5-amino-3-[[4'-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonate
DIRECTBLUE296
Direct Blue 299
Direct Blue 290
Direct Blue 294
4-HYDROXYBENZENESULFONIC ACID SODIUM SALT HYDRATE
1-Naphthol-4-sulfonic acid
4-HYDROXYBENZENESULFONIC ACID SODIUM SALT DIHYDRATE
OXAMINE BLUE 4R
7-AMINO-2-NAPHTHALENESULFONIC ACID SODIUM SALT
6-AMINO-1-NAPHTHOL
Oxamine Blue BB
Oxamine Blue MD
Oxamine Blue BT
Oxamine Blue GN
OXAMINE BLUE B