Phthalic anhydride(O-Xylene Based)
Synonyms:AKOSBBS-00004337;1,3-ISOBENZOFURANDIONE;1,3-ISOBENZOF
URANIDONE;1,3-DIOXOPHTHALAN;1,3-DIOXOPHTHALANE;1,2-BENZENE
DICARBONIC ACID, ANHYDRIDE;1,2-BENZENE DICARBOXYLIC ACID
ANHYDRIDE;1,2-Benzenedicarboxylic Anhydride
CAS:85-44-9
MF:C8H4O3
EINECS:201-607-5
Appilication:
The primary use of phthlic anhydride is as a chemical intermediate in the production
of plastics from vinyl chloride. Phthalate esters,which function as plasticizers, are
derived fromphthalic anhydride. Phthalate plasticizers are used for the production of
flexible PVC products such as cables, pipes and hoses, leather cloth,shoes,film for
packaging etc.
Phthalic anhydride has another major use in the production of polyester resins and
other minor uses in the production of alkyd resins used in paints and lacquer;certain
dyes; insect repellents; and polyester polyol for polyurethanes.It is also utilized as a
rubber scorch inhibitor and retarder.
Phthalic anhydride is a versatile intermediate in organic chemistry, in part because it
is bi-functional and cheaply available. Hydrolysis by hot water forms ortho-phthalic
acid. Hydrolysis of anhydridesis not typically a reversible process. Phthalic acid is
however easily dehydrated to form phthalic anhydride. Above 180℃,phthalic
anhydride re-forms.
The most probable human exposure to phthalic anhydride is through skin contact or
inhalation during manufacture or use. Studies show that exposure to phthalic
anhydride can cause rhinitis,chronic bronchitis, and asthma.
Specification:
|
Item
|
Index of Phthalic Anhydride
|
|
Top grade
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First grade
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Qualified product
|
|
Appearance
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white scaly or crystalline powder
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white scaly or crystalline powder with slight colors
|
|
molten Chroma(Chroma no. )≤
|
20
|
50
|
100
|
|
thermostable Chroma(Chroma no. )≤
|
50
|
150
|
-
|
|
Chroma of vitriol(Chroma no. )≤
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60
|
100
|
150
|
|
crystallization point°C≥
|
130.5
|
130.3
|
130.0
|
|
Purity(mass fraction)%≥
|
99.50
|
99.50
|
99.00
|
|
Free acid(mass fraction)≤ %
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0.20
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0.30
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0.50
|
|
Ash(mass fraction)%≤
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0.05
|
-
|
-
|
.Package and Storage
Packed in 25Kg knitted plastic bag with inner plastic bag and no danger; keep in
cool and dry place.
For 20 GP can load 20tons without pallet, 16tons with pallet
For 40GP can load 26tons without pallet
