12222-48-9 - Names and Identifiers
12222-48-9 - Introduction
Direct Red 224 is an organic synthetic dye, also known as Neutral Red B. Its chemical name is 2-[(4-aminophenyl)diazenyl]benzenesulfonic acid and its chemical formula is C12H11N3O3S.
Direct Red 224 is a neutral dye that is soluble in water and alcohol. It has a bright red color, has good stability to light, detergent, acid and alkali, and is suitable for dyeing yarn, dye pulp, paper and leather.
One method for preparing direct red 224 is through the coupling reaction between p-aniline and benzenesulfinic acid. First, under acidic conditions, aniline reacts with nitrated sulfuric acid to produce nitroaniline, then azo aniline is obtained by reduction, and finally direct red 224 is produced by coupling reaction with benzene sulfinic acid.
Direct Red 224 is a non-edible dye and should be used with care and avoid inhalation of dust. During operation and storage, care should be taken to avoid fire sources, heat sources and oxidants. In case of skin contact or inhalation, flush with water and seek medical help.
it should be noted that the above information is for reference only, and the specific nature, use, preparation and safety information need to be further confirmed and operated according to the specific experimental conditions and product information.
Last Update：2024-04-10 22:29:15