| Identification | More | [Name]
1,2,4,5-Benzenetetracarboxylic anhydride | [CAS]
89-32-7 | [Synonyms]
1,2,4,5-BENZENETETRACARBOXYLIC ANHYDRIDE
1,2,4,5-BENZENETETRACARBOXYLIC DIANHYDRIDE
BENZENE-1,2,4,5-TETRACARBOXYLIC 1,2,4,5-DIANHYDRIDE
BENZENE-1,2,4,5-TETRACARBOXYLIC DIANHYDRIDE
PMDA
PYROMELLITIC DIANHYDRIDE
TIMTEC-BB SBB008218
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
1h,3h-benzo(1,2-c:4,5-c’)difuran-1,3,5,7-tetrone
1H,3H-Benzo[1,2-c,4,5-c’]difuran-1,3,5,7-tetrone
1H,3H-Benzo[1,2-c:4,5-c']difuran-1,3,5,7-tetrone
1H,3H-Benzo[1,2-c:4,5-c’]difuran-1,3,5,7-tetrone
Benzo[1,2-c
Pyromellitic acid anhydride
Pyromellitic acid dianhydride
Pyromellitic anhydride
pyromellitic1,2:4,5-dianhydride | [EINECS(EC#)]
201-898-9 | [Molecular Formula]
C10H4O7 | [MDL Number]
MFCD00005005 | [Molecular Weight]
236.13 | [MOL File]
89-32-7.mol |
| Chemical Properties | Back Directory | [Appearance]
White powder | [Melting point ]
283-286 °C(lit.)
| [Boiling point ]
397-400 °C(lit.)
| [density ]
1,68 g/cm3 | [vapor pressure ]
0Pa at 25℃ | [refractive index ]
1.6000 (estimate) | [Fp ]
380 °C
| [solubility ]
Soluble in dimethyl sulfoxide, acetone, chloroform, ethyl ether, n-hexane and benzene. | [form ]
Fine Powder | [pka]
5.45[at 20 ℃] | [color ]
White to pale yellow | [Water Solubility ]
decomposes | [Sensitive ]
Moisture Sensitive | [Usage]
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. | [BRN ]
213583 | [InChIKey]
ANSXAPJVJOKRDJ-UHFFFAOYSA-N | [LogP]
-2.03 at 21.5℃ | [CAS DataBase Reference]
89-32-7(CAS DataBase Reference) | [NIST Chemistry Reference]
1,2,4,5-Benzenetetracarboxylic anhydride(89-32-7) | [EPA Substance Registry System]
89-32-7(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xn | [Risk Statements ]
R41:Risk of serious damage to eyes.
R42/43:May cause sensitization by inhalation and skin contact . | [Safety Statements ]
S22:Do not breathe dust .
S24:Avoid contact with skin .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S37/39:Wear suitable gloves and eye/face protection . | [WGK Germany ]
1
| [RTECS ]
DB9300000
| [F ]
10-21 | [TSCA ]
Yes | [HS Code ]
29173980 | [Hazardous Substances Data]
89-32-7(Hazardous Substances Data) |
| Raw materials And Preparation Products | Back Directory | [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-->1,2,4,5-Cyclohexanetetracarboxylic Dianhydride-->2,6-Bis(2-pyridinyl)benzo[1,2-c:4,5-c']dipyrrole-1,3,5,7-tetrone-->2,6-Bis(3-hydroxyphenyl)-1,3,5,7-tetraoxo-1,2,3,5,6,7-hexahydrobenzo[1,2-c:4,5-c']dipyrrole-->1,2,4,5-Benzenetetrakis(carbonyl chloride)-->4-pmpmd-->2,2-(1,3,5,7-tetraoxo-5,7-dihydropyrrolo(3,4-f)isoindole-2,6(1H,3H)diyl)dibenzoic acid |
| Hazard Information | Back Directory | [Hazard]
Skin irritant.
| [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. | [Application]
Pyromellitic dianhydride (PMDA) has been used extensively as an important monomer in the preparation of a variety of thermoplastics such as polyesters, polycarbonates, polyethers polyethers, plasticizersplasticizers, expoxy resins, etc. Moreover, it is also useful in the preparation of high performance coatings that have been widely employed in many fields in our daily life beacuase of its excellent thermal, oxidative stability and excellent mechanical properties.
Pyromellitic dianhydride (PMDA) is one of several highly reactive acid anhydrides and used extensively in the production of thermoplastics and high-performance coatings. Anhydrides including PMDA are respiratory irritants and immediate-type sensitisers. Some anhydrides have been associated with occupational asthma. PMDA has also been related to occupational asthma. | [Preparation]
Pyromellitic Dianhydride is prepared by gas-phase oxidation of 1,2,4,5-tetramethylbenzene (or related tetrasubstituted benzene derivatives). An idealized equation is:
C6H2(CH3)4 + 6 O2 → C6H2(C2O3)2 + 6 H2O
In the laboratory, it can be prepared by dehydration of pyromellitic acid using acetic anhydride. | [General Description]
Pyromellitic dianhydride (PMDA) is an acidic anhydride that can be used as a repair agent and as a chain extender in the formation of polyethylene terephthalate (PET) based chain extensions. It is mainly used in the production of thermoplastics and other coating applications. | [Flammability and Explosibility]
Notclassified | [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.] |
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