PMDA 1,2,4,5-Benzenetetracarboxylic anhydride Pyromellitic Dianhydride COA TDS price MSDS
PMDA 1,2,4,5-Benzenetetracarboxylic anhydride Pyromellitic Dianhydride MSDS
PMDA 1,2,4,5-Benzenetetracarboxylic anhydride Pyromellitic Dianhydride TDS
PMDA 1,2,4,5-Benzenetetracarboxylic anhydride Pyromellitic Dianhydride price
Product no. chemwill-Pyromellitic Dianhydride -9210120
PMDA 1,2,4,5-Benzenetetracarboxylic anhydride Pyromellitic Dianhydride Manufacturer High quality Best price In stock factory
PMDA Pyromellitic Dianhydride CAS 89-32-7
1,2,4,5-Benzenetetracarboxylic anhydride CAS 89-32-7
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Name: Pyromellitic Dianhydride
Pyromellitic Dianhydride Chemical Properties
Melting point 283-286 °C(lit.)
Boiling point 397-400 °C(lit.)
density 1,68 g/cm3
refractive index 1.6000 (estimate)
Pyromellitic dianhydride is an organic compound with the formula C6H2(C2O3)2. It is the double carboxylic acid anhydride that is used in the preparation of polyimide polymers such as Kapton. It is a white solid.
It is prepared by gas-phase oxidation of 1,2,4,5-tetramethylbenzene (or related tetrasubstituted benzene derivatives). An idealized equation is:
1H,3H-Benzo[1,2-c:4,5-c‘]difuran-1,3,5,7-tetrone; benzene-1,2,4,5-tetracarboxylic dianhydride; BDFtetron; Pyromellitic anhydride; Piromellitic dianhydride;
Appearance & Physical State White powder
Density 1.68
Boiling Point 397-400ºC
Melting Point 283-287ºC
Flash Point 380ºC
Refractive Index 1.708
Water Solubility decomposes
Stability Stable under normal temperatures and pressures.
Storage Condition Store in a cool, dry place. Store in a tightly closed container.
Safety Info
RTECS DB9300000
Safety Statements S22-S24-S26-S37/39
HS Code 2917399090
Fp 380 °C
solubility Soluble in dimethyl sulfoxide, acetone, chloroform, ethyl ether, n-hexane and benzene.
form Fine Powder
color White to pale yellow
HS Code 29173980
Pyromellitic Dianhydride Usage And Synthesis
Chemical Properties White powder. Soluble in some organic solvents; hydrolyzes to the acid when exposed to moisture.
Uses Pyromellitic dianhydride (PMDA) is employed as a curing agent for epoxy agent resins used for casting, laminating, the manufacture of moulding powders, adhesives and coatings.
Uses pyromellitic dianhydride be used for preparation polyimide and epoxy resin material.
Hazard Skin irritant.
Purification Methods Crystallise the dianhydride from ethyl methyl ketone or dioxane. Dry, and sublime it in vacuo.[Beilstein 19 H 196, 19/5 V 407.]
Pyromellitic Dianhydride Preparation Products And Raw materials
Raw materials m-Xylene-->P-XYLENE-->Anthracene-->1,2,4-Trimethylbenzene-->Chromic acid-->1,2,4,5-Tetramethylbenzene-->N-PROPYLBENZENE-->tetramethylbenzene
Preparation Products 1,2,4,5-TETRACYANOBENZENE-->1,2,4,5-BENZENETETRACARBOXAMIDE-->PYROMELLITIC DIIMIDE-->Polyimide film
Synonyms: 1,2,4,5-Benzenetetracarboxylic 1,2:4,5-dianhydride;1,2,4,5benzenetetracarboxylic1,2:4,5dianhydride;1,2,4,5-benzenetetracarboxylic1,2:4,5-dianhydride;1,2,4,5-Benzenetetracrboxylicdianhydride;pyromelliticacidanhydride;pyromelliticaciddianhydride;Pyromelliticanhydride;1,2,4,5-BENZENETETRACARBOXYLIC ANHYDRIDE
CAS: 89-32-7
MF: C10H2O6
MW: 218.12
EINECS: 201-898-9
China
