22094-93-5

Name	Pigment Yellow 81
Synonyms	21127 C.I. 21127 PIGMENT YELLOW 81 Pigment Yellow 81 C.I.PigmentYellow81 2,2''-[(2,2',5,5'-tetrachloro-4,4'-biphenylylene)bis(azo)]bis-2',4'-acetoacetoxylidide Butanamide, 2,2-(2,2,5,5-tetrachloro1,1-biphenyl-4,4-diyl)bis(azo)bisN-(2,4-dimethylphenyl)-3-oxo- 2,2'-(2,2',5,5'-TETRACHLORO1,1'-BIPHENYL-4,4'-DIYL)BIS(AZO)BISN-(2,4-DIMETHYLPHENYL)-3-OXO-BUTANAMIDE 2,2'-[[2,2',5,5'-tetrachloro(1,1'-biphenyl)-4,4'diyl]bis(azo)]bis[N-(2,4-dimethylphenyl)-3-oxo-Butanamide] 2,2'-[(2,2',5,5'-tetrachloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[N-(2,4-dimethylphenyl)-3-oxobutyramide] 2,2'-[(2,2',5,5'-Tetrachloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[N-(2,4-dimethylphenyl)-3-oxo-butanamide] 2,2'-[(2,2',5,5'-tetrachlorobiphenyl-4,4'-diyl)di(E)diazene-2,1-diyl]bis[N-(2,4-dimethylphenyl)-3-oxobutanamide] 2-[2,5-dichloro-4-[2,5-dichloro-4-[1-[(2,4-dimethylphenyl)carbamoyl]-2-oxo-propyl]azo-phenyl]phenyl]azo-N-(2,4-dimethylphenyl)-3-oxo-butanamide
CAS	22094-93-5
EINECS	244-776-0
InChI	InChI=1/C36H32Cl4N6O4/c1-17-7-9-29(19(3)11-17)41-35(49)33(21(5)47)45-43-31-15-25(37)23(13-27(31)39)24-14-28(40)32(16-26(24)38)44-46-34(22(6)48)36(50)42-30-10-8-18(2)12-20(30)4/h7-16,33-34H,1-6H3,(H,41,49)(H,42,50)

Molecular Formula	C36H32Cl4N6O4
Molar Mass	754.49
Density	1.38
Boling Point	821.0±65.0 °C(Predicted)
Flash Point	450.3°C
Vapor Presure	4.62E-27mmHg at 25°C
Appearance	Powder
pKa	0.05±0.59(Predicted)
Storage Condition	Room Temprature
Refractive Index	1.642
Physical and Chemical Properties	hue or shade: bright green yellow relative density: 1.41-1.42 Bulk density/(lb/gal):11.7-11.8 melting point/℃:>400 average particle size/μm:0.16 particle shape: Cube specific surface area/(m2/g):26 pH value/(10% slurry):6.5 oil absorption/(g/100g):35-71 hiding power: translucent diffraction curve: reflection curve: lemon yellow powder, bright color, strong coloring. Good light fastness, good solvent resistance, heat resistance of 170~180 ℃ (not more than 30min).
Use	The variety is strong green and yellow, and monoazo pigment C.I. Pigment Yellow 3 phase approximation; Satisfactory light fastness, good heat and solvent resistance, suitable for solvent-containing metal decorative ink; Light fastness in alkyd melamine coating grade 6-7; it is more heat-resistant than other varieties of benzidine yellow; Polyolefin (260 ℃/5min), in the low concentration of soft PVC coloring appear bleeding, hard PVC(1/3SD) light fastness 7; it can also be used for the dyeing of acetate fiber pulp and pigment printing paste. It is mainly used for coloring of paint, paint, printing ink and plastic products.

LogP	0.5 at 25℃ and pH7
EPA chemical information	Information provided by: ofmpub.epa.gov (external link)
use	is mainly used for coloring coatings, paints, printing inks and plastic products. Mainly used for coloring industrial coatings, plastics and inks
production method	reaction equation: the mixed solution of 2,2 ',3,3'-tetrachlorobenzidine and 35% hydrochloric acid and water is cooled to about 5 ℃, nitrous acid solution is added at 5~10 ℃ and reacted for 30min, activated carbon is used to adsorb and destroy excess sodium nitrite. The diazonium salt solution is filtered for later use. Dilute acetic acid is added dropwise to the mixture of 2, 4-dimethylacetanilide, water and sodium hydroxide, and the pH value is adjusted to about 6. After adding diazonium salt dropwise, continue to stir for 0.5h, raise the temperature to 90~95 ℃, and maintain for 30~60min, filter and dry to obtain yellow pigment.

Last Update：2024-04-09 19:05:10

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