| Name | Direct Yellow 83 |
| Synonyms | Direct Yellow 83 Tetrasodium 3,3'-((1,6-dihydro-6-oxo-1,3,5-triazine-2,4-diyl)bis(imino(5-methoxy-2-methyl-4,1-phenylene)azo))bis(naphthalene-1,5-disulphonate) tetrasodium 3-[4-[[4-[[4-[(4,8-disulfonato-2-naphthyl)azo]-2-methoxy-5-methyl-phenyl]amino]-6-oxo-1H-1,3,5-triazin-2-yl]amino]-5-methoxy-2-methyl-phenyl]azonaphthalene-1,5-disulfonate |
| CAS | 82944-42-1 |
| EINECS | 280-074-0 |
| InChI | InChI=1/C39H33N9O15S4.4Na/c1-19-11-29(31(62-3)17-27(19)47-45-21-13-25-23(35(15-21)66(56,57)58)7-5-9-33(25)64(50,51)52)40-37-42-38(44-39(49)43-37)41-30-12-20(2)28(18-32(30)63-4)48-46-22-14-26-24(36(16-22)67(59,60)61)8-6-10-34(26)65(53,54)55;;;;/h5-18H,1-4H3,(H,50,51,52)(H,53,54,55)(H,56,57,58)(H,59,60,61)(H3,40,41,42,43,44,49);;;;/q;4*+1/p-4 |
| Molecular Formula | C39H29N9Na4O15S4 |
| Molar Mass | 1083.92 |
| Physical and Chemical Properties | Chemical properties yellowish brown powder. Easily soluble in water, slightly soluble in ethanol. It is purple-red in concentrated sulfuric acid and orange in sodium hydroxide solution. |
| Use | Use direct sun-resistant yellow L-5R is mainly used for dyeing cellulose fiber fabrics such as cotton, hemp and viscose fiber, and can be used as D-type dye for one-bath dyeing of polyester-cotton and polyester-viscose blended fabrics. |
| Raw Materials | Cyanuric chloride 2-Methoxy-5-methylaniline 2-Amino-4,8-naphthalenedisulfonic acid 2-Methoxy-5-methylaniline Cyanuric chloride |
Amino C acid (2-naphthylamine -4,8-disulfonic acid), chrisedine and cyanuric chloride are used as raw materials. First, the amino C acid is diazotized and coupled with klisedine. Then the two molecules of monoazo compound are condensed with one molecule of cyanuric chloride, and then hydrolyzed to obtain the product. The finished product is salted out, filtered, dried and crushed.