Solvent Red 196 CAS 52372-36-8

Solvent Red 196 is a fluorescent red powder. not soluble in water. Good light fastness, excellent thermal stability, up to 300 ℃.

Using 4-diethylaminosalicylaldehyde, 2-cyanomethylbenzimidazole and methyl cyanoacetate as raw materials. First, 4-diethylaminosalicylaldehyde and 2-cyanomethylbenzimidazole are condensed in DMF solvent, and then reacted with methyl cyanoacetate to obtain the product. After post-processing and drying, the finished product is obtained. Or C.I.SolventRed197 and hydrochloric acid reflux to get the product. or (C.I.solventned197). Add C.I. Solvent Red 19711.4g and concentrated hydrochloric acid 200mL into the reaction flask, reflux at 100-103°C for 2.5h, and measure the reaction end point. After the reaction, 500 g of ice was added, neutralized with 50% NaOH solution to pH=7.5, filtered, washed with water, and dried to obtain a red dye.