Purple-red powder. Insoluble in water, ethanol, acetone, toluene, slightly soluble in hot chloroform, pyridine, o-chlorophenol, soluble in tetrahydronaphthalene, xylene. Reddish-purple in alkaline insurance powder reducing solution, orange in acidic solution.
Vat Orange 3 is used for dyeing cotton and printing cotton fabrics, as well as for dyeing linen, viscose, and silk. It has good leveling properties and moderate affinity. It is also used in the manufacture of organic pigments.
4,10-Dibromoanthanthrone,
Indanthren Brilliant Orange RK,
is prepared from 1,1'-binaphthyl-8,8'-
dicarboxylic acid in sulfuric acid monohydrate
at 35 C, followed by bromination in the presence
of iodine . It is also used as a
pigment.
Properties and Applications
|
TEST ITEMS
|
SPECIFICATION
|
|
APPEARANCE
|
RED TO ORANGE POWDER
|
|
SHADE
|
YELLOISH
|
|
HEAT RESISTANCE
|
300°C min
|
|
LIGHT FASTNESS
|
7-8
|
|
ACID RESISTANCE
|
5
|
|
ALKALI RESISTANCE
|
5
|
|
FASTNESS TO BLEEDING
|
5
|
|
OIL ABSORPTION
|
40-45%
|
|
SPECIFIC SURFACE
|
30 m
2
/g
|
|
DENSITY
|
1.97 g/cm
3
|
|
RESIDUE ON 80 MESH
|
5.0% max
|
|
WATER SOLUBLE
|
1.0% max
|
|
VOLATITE 105 °C
|
1.0% max
|
|
TINTING STRENGTH
|
100-105 %
|
