Pigment Red 176

Reaction equation operation process Add 42 parts of water, 0.67 parts of hydrochloric acid and 2 parts of iron powder to the four-neck flask, add about 4.5 parts of 5-nitrobenzimidazol-2-one in batches, heat to reflux, and then add 4.0 parts of iron When the yellow percolation circle disappears, reflux for 2 hours, adjust the pH value to 8-9 with sodium hydroxide, decolorize and filter, and concentrate the filtrate to obtain a thick and viscous crude product. Add this crude product to 180 parts of o-dichloride In benzene, stir and heat to 100°C and add 169 parts of 2-hydroxy-3-naphthoic acid, add 1.8 parts of phosphorus trichloride dropwise with stirring, reflux at 170～180°C for 1h, and then drop the temperature to 100°C and add 1.8 parts of trichloro Phosphorus reflux for 5h, low chromatographic control end point, after the reaction is cooled, neutralize with 10% sodium carbonate solution to pH 9-10, steam distill the solvent, filter the water to wash the precipitate, and then dissolve in sodium hydroxide solution, acid The product can be obtained by washing with water, and the pigment can be obtained by coupling the product and KD bass.

Used for car original paint and repair paint, coloring of plastic, ink, rubber, etc.

Molecular Weight:572.6
XLogP3:5.4
Hydrogen Bond Donor Count:5
Hydrogen Bond Acceptor Count:7
Rotatable Bond Count:7
Exact Mass:572.18081789
Monoisotopic Mass:572.18081789
Topological Polar Surface Area:154
Heavy Atom Count:43
Complexity:1040
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes