Phthalic
anhydride
Phthalic anhydride
is an important organic chemical raw material which is mainly used to
make plasticizer in plastic, alkyd resin, dye, unsaturated resin and some
medicines or farm chemicals.
molecular formula :C8H4O3
molecular weight :148.12
Quality standards of phthalic
anhydride
property
|
specification
|
excellent
|
frist
grade
|
qualified
|
appearance |
white
scale-shaped or crystal powder |
white
scale-shapedor crystal powder tinged with other colour
|
molten
colour ¡Ü |
20
|
50
|
100
|
molten
clour after heating ¡Ü
|
50
|
150
|
-
|
solidification
point ¡Ý ¡æ |
130.5
|
130.3
|
130.0
|
purity%
¡Ý |
99.5
|
99.5
|
99.0
|
free
acid content ¡Ü % |
0.5
|
0.5
|
0.5
|
ash%
¡Ü |
0.05
|
-
|
-
|
|