Molecular Formula | C18H16N6O2S |
Molar Mass | 380.42 |
Density | 1.37±0.1 g/cm3(Predicted) |
Boling Point | 616.2±65.0 °C(Predicted) |
pKa | 2.12±0.50(Predicted) |
Physical and Chemical Properties | Blue light red powder. |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
Use | disperse red 2BL-S is mainly used for polyester dyeing, suitable for high temperature and high pressure method and hot melt method. Bright color, excellent performance, high strength. It is also used for printing polyester fabric and mixing black dye-disperse black 2B-SF with Disperse Orange R-SF, disperse Yellow Brown S-3RFL and Disperse Blue 2G-SF. |
production method | with 6-nitro-2-aminobenzothiazole and N-ethyl-N-cyanoethylaniline as raw materials, the former is first diazotized and then coupled with N-ethyl-N-cyanoethylaniline to give the product. The final product was obtained by filtration, grinding and drying.. 9.9kg sulfuric acid and 6-nitro-2-aminobenzothiazole were added to the reactor, and the temperature was raised to 70 ° C. To be completely soluble. Then the temperature was cooled to 0 ℃, and 7kg nitrosyl sulfuric acid was added dropwise within 30min. After addition, the heat preservation was continued for 2H to the end point, and the excess sodium nitrite was decomposed to obtain diazo solution. Add 24.1kg water, N-ethyl-N-(β-cyanoethyl) aniline (40% solution) to the coupling kettle, stir at room temperature until fully soluble, then cool to 0-5 ℃, diazo solution was added for about 30min, and the reaction was continued to the end point. Filtration, washing with water until neutral, and drying gave 13kg of dye. |