C.I. Pigment Red 175

Reaction equation During the operation, 7.6 parts (purity 99%) of methyl anthranilate, 100 parts of 2mol/L hydrochloric acid and 100 parts of water were stirred and dissolved, and cooled to 6°C. Add 25 parts of 2mol/L sodium nitrite solution under rapid stirring, and the reactant becomes transparent. Stir for 1h and filter, the filtrate is destroyed with sulfamic acid solution to destroy excess nitrous acid, 60 parts of 2mol/L sodium acetate are added, and the solution pH=5. Stir 19 parts (84%) of 5-(2'-hydroxy-3'-benzamide)-benzimidazole-2-one, 75 parts of 2mol/L sodium hydroxide solution and 300 parts of water to 50～ At 60°C, hot filter to remove insoluble materials, and cool the filtrate to room temperature. Drop the solution into the above diazonium solution within 2 hours at 10°C, control pH=5 to 6.2, stir for 1 hour after coupling, heat to boiling, hot filtered hot water to wash until neutral, and dry to obtain 23 parts of crude pigment. Add the finely ground above-mentioned pigment to 230 parts of dimethylformamide, stir well and heat to 140～145℃, keep for 2h, cool to 100℃, filter, and wash with water to obtain 21.5 parts of red pigment.

It can be used for coloring of paint, polyethylene and polystyrene. PVC.

Molecular Weight:481.5
XLogP3:4.5
Hydrogen Bond Donor Count:4
Hydrogen Bond Acceptor Count:7
Rotatable Bond Count:6
Exact Mass:481.13861872
Monoisotopic Mass:481.13861872
Topological Polar Surface Area:142
Heavy Atom Count:36
Complexity:868
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes