Direct Brilliant Yellow 4R
Chrysophenine
CAS: 2870-32-8
Molecular Formula: C30H26N4Na2O8S2
Direct Brilliant Yellow 4R - Names and Identifiers
| Name | Chrysophenine |
| Synonyms | CI 24895 DY12 dye C.I. 24895 Chrysophenine Chrysophenine G Direct Yellow 12 Direct Yellow GK Direct yellow-12 Diazine Yellow CP Direct Yellow 12 Kayaku Chrysophenine C.I. Direct Yellow 12 Mitsui Chrysophenine G abcol direct yellow 4 ra Direct Brilliant Yellow 4R chrysophenine (C.I. 24895) Atul Direct Fast Yellow GCH Direct yellow 12 (C.I. 24895) disodium 2,2'-(E)-ethene-1,2-diylbis{5-[(E)-(4-ethoxyphenyl)diazenyl]benzenesulfonate} disodium 2,2'-(Z)-ethene-1,2-diylbis{5-[(E)-(4-ethoxyphenyl)diazenyl]benzenesulfonate} |
| CAS | 2870-32-8 |
| EINECS | 220-698-2 |
| InChI | InChI=1/C30H28N4O8S2.2Na/c1-3-41-27-15-11-23(12-16-27)31-33-25-9-7-21(29(19-25)43(35,36)37)5-6-22-8-10-26(20-30(22)44(38,39)40)34-32-24-13-17-28(18-14-24)42-4-2;;/h5-20H,3-4H2,1-2H3,(H,35,36,37)(H,38,39,40);;/q;2*+1/p-2/b6-5-,33-31+,34-32+; |
Direct Brilliant Yellow 4R - Physico-chemical Properties
| Molecular Formula | C30H26N4Na2O8S2 |
| Molar Mass | 680.66 |
| Melting Point | >300°C |
| Solubility | DMSO (Slightly), Methanol (Slightly), Water (Slightly) |
| Appearance | Solid |
| Color | Orange to Dark Orange |
| Storage Condition | Amber Vial, Refrigerator, Under inert atmosphere |
| Stability | Light Sensitive |
| MDL | MFCD00007488 |
| Physical and Chemical Properties | Yellow powder. Water-soluble, soluble in water yellow to golden yellow solution, such as the solution is cooled flocculent dye precipitation. If the 1G dye dissolved in 50mL water, cooling to less than or equal to 15 deg C into frozen, so called Frozen Yellow. The aqueous solution plus concentrated hydrochloric acid jujube red precipitation; Plus concentrated alkali gold orange precipitation, plus dilute alkali light slightly changed. Slightly soluble in ethanol (lemon color), ethylene glycol ether and acetone (green yellow). In concentrated sulfuric acid showed red violet, after dilution of purple to red blue precipitation. Insoluble in concentrated alkali, diluted white. Yellow in concentrated ammonia. |
Direct Brilliant Yellow 4R - Risk and Safety
| Safety Description | S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| TSCA | Yes |
Direct Brilliant Yellow 4R - Reference Information
| color index | 24895 |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | direct brilliant yellow 4R is used for dyeing cotton and viscose fabric with red and yellow light, good dyeing and levelness, high dyeing rate, and certain hiding power for dead cotton fiber and uneven viscose. For cotton fabrics, it is mostly used for dyeing and printing of knitwear, flannel and flannel, and less for cotton. High dyeing rate of rich fiber. It is also used for dyeing silk, wool, vinylon, nylon and blended fabrics. The color depth of silk, wool, cotton and viscose is similar, the color light of wool is slightly darker, and diacetate fiber, polyester and acrylic are not stained. It can also be used for direct printing and dyeing of cotton, viscose and silk fabrics. Except for single use, it is often used with direct green B, direct dark green B, and direct acid-resistant red 4BS. It is used for dyeing cotton, hemp, viscose and other fabrics, and can be used for dyeing leather and pulp. It can dye silk and wool in a weak acid bath |
| Production method | Using DSD acid (4,4 '-diaminostilbene-2, 2'-disulfonic acid), benzoic acid and chloroethane as raw materials, DSD acid is first double nitrided, coupled with phenol, and then ethylated with chloroethane to obtain the product. The finished product is salted out, filtered, dried and crushed.. 110kg DSD acid (100%), 33kg of sodium carbonate (100%), 66.12kg of sulfuric acid (100%) and 600L of water are dissolved at 40 ℃, stirred for 1h, diazotized with 42kg of sodium nitrite (100%) and 250L of water at 3-5 ℃, then coupled with 56.4kg of phenol (100%), salted out and filtered. Take 600kg filter cake, 750kg ethanol, 80kg chloroethane, 150kg sodium carbonate (97%) and 35kg sodium hydroxide (100%), raise the temperature to 100 ℃, react at 0.35MPa for 10h, reduce the temperature, reduce the pressure, carry out salting out, filter and dry to obtain product dyes. |
Last Update：2024-04-09 20:45:29
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