3214-47-9
direct yellow 50 (C.I. 29025)
CAS: 3214-47-9
Molecular Formula: C35H24N6Na4O13S4
3214-47-9 - Names and Identifiers
| Name | direct yellow 50 (C.I. 29025) |
| Synonyms | Direct yellow 0 Direct Yellow 50 Direct Yellow 50 C.I. Direct Yellow 50 (VAN) direct yellow 50 (C.I. 29025) C.I. Direct Yellow 50, tetrasodium salt tetrasodium 3-[4-[[4-[(4,8-disulfonato-2-naphthyl)azo]-3-methyl-phenyl]carbamoylamino]-2-methyl-phenyl]azonaphthalene-1,5-disulfonate tetrasodium 3-[(E)-{4-[({4-[(E)-(4,8-disulfonatonaphthalen-2-yl)diazenyl]-3-methylphenyl}carbamoyl)amino]-2-methylphenyl}diazenyl]naphthalene-1,5-disulfonate |
| CAS | 3214-47-9 |
| EINECS | 221-728-7 |
| InChI | InChI=1/C35H28N6O13S4.4Na/c1-19-13-21(9-11-29(19)40-38-23-15-27-25(33(17-23)57(49,50)51)5-3-7-31(27)55(43,44)45)36-35(42)37-22-10-12-30(20(2)14-22)41-39-24-16-28-26(34(18-24)58(52,53)54)6-4-8-32(28)56(46,47)48;;;;/h3-18H,1-2H3,(H2,36,37,42)(H,43,44,45)(H,46,47,48)(H,49,50,51)(H,52,53,54);;;;/q;4*+1/p-4 |
3214-47-9 - Physico-chemical Properties
| Molecular Formula | C35H24N6Na4O13S4 |
| Molar Mass | 956.82 |
| Storage Condition | Room Temprature |
| Physical and Chemical Properties | Chemical orange powder. Water solubility is very good, its aqueous solution is golden yellow, slightly soluble in ethanol, insoluble in other organic solvents. Add concentrated hydrochloric acid to the aqueous solution to produce a purple precipitate; add concentrated alkali to produce a gold-orange precipitate. It is magenta in concentrated sulfuric acid, with green light and blue precipitation after dilution; it is a purple solution in concentrated nitric acid. Not sensitive to hard water. When dyeing, the color light of copper and iron ions is basically unchanged. |
| Use | Uses for cotton, viscose, silk, wool and nylon and printing and dyeing, also used for direct printing and discharge printing of cellulose fiber fabrics. Can also be used for leather, paper, cellulite, anode aluminum coloring. This product has bright color, satisfactory application in silk printing and dyeing, and large demand. Mainly used for cotton fabric dyeing |
3214-47-9 - Nature
| EPA chemical information | C. I. Direct Yellow 50, tetrasodium salt (3214-47-9) |
Last Update：2024-04-17 15:17:14
3214-47-9 - Uses and synthesis methods
Uses
direct sun-resistant yellow RS is used for dyeing and direct printing of cotton, viscose fibers and their fabrics to obtain bright red and yellow. It has good levelness and transfer dyeing, and the dyeing rate is still good. Treatment with fixing agent Y or fixing agent M after dyeing can improve the fastness of wet treatment, but the color light changes slightly. Direct sun-resistant yellow RS can also be used for dyeing silk fabrics, and can dye polyester-viscose blended fabrics in the same bath with disperse dyes, and polyester does not stain.
Production method
1. after diazotization of amino c acid (I. e. 2-naphthylamine -4,8-disulfonic acid), m-toluidine is coupled, then condensed with phosgene, and then salted out, filtered and dried to obtain the product.
2. Using 2-amino -4,8-naphthalene disulfonic acid, m-toluidine, and di (trichloromethyl) carbonate (commonly known as triphosgene) as raw materials, first 2-amino -4,8-naphthalene disulfonic acid is diazotized, coupled with m-toluidine, and then the two-molecule coupling product is condensed with triphosgene. The finished product is salted out, filtered, dried and crushed..
add 6g 2-amino -4,8-naphthalenedisulfonic acid, excessive 50% concentrated hydrochloric acid and 50mL of water into the reactor, quickly add 1.4g of 20mL of sodium nitrite aqueous solution at 14 ℃, stir for 2h, add 2.1g of m-toluidine coupling, stir for 1h, add appropriate amount of sodium chloride for salting out, and filter to obtain monoazo dye.
Take 0.93g of the above monoazo dye, add 40mL phosphate buffer solution with pH value of 6.0, stir to dissolve it, then add bis (trichloromethyl) carbonate (Cl3COCO2CCl3) at 30 ℃, the feeding ratio is bis (trichloromethyl) carbonate: monoazo dye = 0.25:1 (mass ratio), add a drop of triethylamine (catalyst), react at constant temperature, continuously add 10% sodium hydroxide solution dropwise to maintain the pH value at 6.0, react for about 12h to the end point, add salt for salting out, and filter to obtain dye. The yield is about 87%.
Last Update：2024-04-17 15:17:36
3214-47-9 - Security information
| WGK Germany | 3 |
Last Update：2024-04-17 15:17:50
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