Acid Blue 350 CAS #138067-74-0

Acid Blue 350, English name C.I. Acid Blue 350, its molecular formula is C_{28} H_{22} N_{3} NaO_{7} S_{2}, molecular weight is 599.60.
Acid Blue 350 is an anthraquinone dye, suitable for dyeing and printing wool, nylon and silk, and belongs to weak acid dye. It has good water solubility and strong affinity for protein fiber and polyamide fiber. Its color fastness is good, for example, the light fastness can reach 4-5 level, the perspiration fastness is 5 level, and the wool staining is 4-5 level; the soap washing (40%) fading fastness is 4-5 level, and the wool staining is 5 level.
In industrial production, 2-amino-4-methoxybenzoic acid and phthaloquinone are usually used as raw materials to synthesize acid blue 350 through condensation reaction and other steps. The specific synthesis method may vary depending on the manufacturer and process requirements.