89-32-7 PMDA Pyromellitic Dianhydride

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 -9210121

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