Basic Yellow 24
Basic Yellow 24
CAS: 52435-14-0
Molecular Formula: C19H21N5O4S2
Basic Yellow 24 - Names and Identifiers
| Name | Basic Yellow 24 |
| Synonyms | Basic Yellow 24 Anilan Yellow 7GLF C.I. BASIC YELLOW 24 Brilliant Yellow 7GL Basic yellow 24 (C.I. 11480) Dycosacryl Brilliant Yellow 7GL 2-(((1,3-Dihydro-1,3-dimethyl-2H-benzimidazol-2-ylidene)methyl)azo)-3-methylbenzothiazolium methyl sulphate 2-[[(1,3-dihydro-1,3-dimethyl-2H-benzimidazol-2-ylidene)methyl]azo]-3-methylbenzothiazolium methyl sulphate Benzothiazolium, 2-(((1,3-dihydro-1,3-dimethyl-2H-benzimidazol-2-ylidene)methyl)azo)-3-methyl-, methyl sulfate Benzothiazolium, 2-[[(1,3-dihydro-1,3-dimethyl- 2H-benzimidazol-2-ylidene)methyl]azo]-3-methyl -, methyl sulfate 1,3-dimethyl-2-{[(3-methyl-1,3-benzothiazol-2(3H)-ylidene)hydrazinylidene]methyl}-1H-benzimidazol-3-ium methyl sulfate |
| CAS | 52435-14-0 |
| EINECS | 257-917-6 |
| InChI | InChI=1/C18H18N5S.CH4O4S/c1-21-13-8-4-5-9-14(13)22(2)17(21)12-19-20-18-23(3)15-10-6-7-11-16(15)24-18;1-5-6(2,3)4/h4-12H,1-3H3;1H3,(H,2,3,4)/q+1;/p-1 |
Basic Yellow 24 - Physico-chemical Properties
| Molecular Formula | C19H21N5O4S2 |
| Molar Mass | 447.53 |
| Physical and Chemical Properties | Color light yellow, generally light yellow powder. Soluble in hot water. Color and Light stability, light fastness 4-5. Compatibility value K = 2. |
Basic Yellow 24 - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | cationic tender yellow 7GL dyed acrylic fiber is fluorescent tender yellow, which is the more gorgeous variety in tender yellow. It can be used for direct printing of acrylic fabric and silk fabric. It is also used to dye wool nitrile or viscose nitrile blended fabrics, and rarely stains wool and viscose fibers. It is often composed of three primary colors with cationic red 2GL and cationic brilliant blue RL, which are stained with bright chromatograms, such as light to medium colors such as rice, coffee, camel, and gray. used for dyeing acrylic fiber and its blended fabric. When dyeing in acetic acid and sodium acetate bath, pH value has little effect on color light. It is often composed of three primary colors with cationic red 2GL and brilliant blue RL, and is stained with bright chromatography. It also dyes silk in the same bath with the grafting method, which can improve the fastness. |
| production method | 2-dichloromethylbenzimidazole and N-methyl-2-benzothiazole hydrazone are used as the main raw materials, first Condensation, then methylate with dimethyl sulfate, and finally filter and dry to obtain the finished product. Raw material consumption (kg/t) phenylenediamine 171 chloroform 258 dichloroacetic acid 320 magnesium oxide 160 hydrazine hydrate 346 zinc chloride 30 dimethyl sulfate 1110 refined salt 950 hydrochloric acid 1360 aniline 205 sodium carbonate 140 sulfuric acid 150 sodium thiocyanate 140 emulsifier OP 7 sulfur chloride 354 activated carbon 17 N-methyl -2-benzothiazaone and 2,2-dichloromethylbenzimidazole are used as main raw materials, after condensation, methylation with dimethyl sulfate to filter out waste residue, add a small amount of leveling dye OP to the filtrate, salting out, filtering and drying.. Add 400L of water in the reaction pot, slowly add 30kg of 30% hydrochloric acid and 24.6kg of 2,2-dichloromethylbenzimidazole, raise the temperature to 80-85 ℃, add 24kg of N-methyl -2-benzothiazole hydrazone, continue to slowly raise the temperature to 95-110 ℃, and keep the temperature for 2 hours. Then cool to about 15 ℃, add 24kg of magnesium oxide, control the pH value of 8-9, stir for 10min, continue to cool to 10 ℃, add 124kg of dimethyl sulfate, control the reaction temperature of 30-35 ℃,pH value of 8, react for 1h, add 20kg of dimethyl sulfate, control the temperature of 38-43 ℃, react for 2h, and the pH value will drop to about 6. After the reaction, the temperature was raised to 90-95 ℃ within 1h, and stirred for 15min until Congo red test paper was blue. Add water to adjust the volume of feed liquid to about 1100L, heat to 90-95 ℃, filter while hot, and wash the filter residue with 90 ℃ hot water 200L. The filtrate and washing water are added into the reaction pot, 68kg of hydrochloric acid and 1kg of leveling dye OP are added, and the materials are dissolved by stirring. According to 7% of the material quantity, refined salt is added for salting out, stirred for 1h, filtered and dried to obtain about 60kg of dye. |
Last Update：2024-04-10 22:29:15
