Description

Pyromellitic Dianhydride (PMDA) (CAS 89-32-7) is a high-purity aromatic dianhydride with the molecular formula C₁₀H₂O₆, widely used in advanced polymer synthesis. This white crystalline solid is an essential monomer for producing polyimides, offering exceptional thermal stability, mechanical strength, and chemical resistance. PMDA is a critical precursor in the manufacture of high-performance materials, including Kapton®-like films, adhesives, and coatings for aerospace, electronics, and automotive applications. Its high reactivity with diamines enables the formation of thermally stable polyimide resins, making it indispensable in microelectronics (e.g., photoresists, dielectric layers) and composite materials. Store in a cool, dry place under inert conditions to prevent hydrolysis. Available in 98%+ purity with customizable particle sizes for R&D and industrial use.

Properties

• CAS Number: 89-32-7
• Complexity: 349
• IUPAC Name: furo[3,4-f]isobenzofuran-1,3,5,7-tetrone
• InChI: InChI=1S/C10H2O6/c11-7-3-1-4-6(10(14)16-8(4)12)2-5(3)9(13)15-7/h1-2H
• InChI Key: ANSXAPJVJOKRDJ-UHFFFAOYSA-N
• LogP: log Kow = 2.14 /Estimated/
• Exact Mass: 217.98513778
• Molecular Formula: C10H2O6
• Molecular Weight: 218.12
• SMILES: C1=C2C(=CC3=C1C(=O)OC3=O)C(=O)OC2=O
• Topological: 86.7
• Monoisotopic Mass: 217.98513778
• Physical Description: Pellets or Large Crystals; Dry Powder
• Color/Form: White powder
• Boiling Point: 397-400 °C
• Melting Point: 286 °C
• Solubility: Soluble in some organic solvents
• Density: 1.68 g/cu cm
• Vapor Pressure: 0.0000048 [mmHg]
• Henry’s Law Constant: Henry’s Law constant = 7.5X10-9 atm-cu m/mole @ 25 °C /Estimated/
• Synonyms: PYROMELLITIC DIANHYDRIDE, Pyromellitic anhydride, PMDA, Pyromellitic acid anhydride, Pyromellitic acid dianhydride, 1,2,4,5-Benzenetetracarboxylic anhydride, Pyromellitic 1,2:4,5-dianhydride, NSC 4798, HSDB 6950, EINECS 201-898-9, Benzene-1,2,4,5-tetracarboxylic dianhydride, Benzene-1,2:4,5-tetracarboxylic dianhydride, UNII-2Z22T30QZQ, 2Z22T30QZQ, 1,2,4,5-Benzenetetracarboxylic 1,2:4,5-dianhydride, NSC-4798, 1,2,4,5 Benzenetetracarboxylic 1,2:4,5 dianhydride, 1,2,4,5-benzenetetracarboxylic acid dianhydride, 1,2,4,5-BENZENETETRACARBOXYLIC ACID 1,2:4,5-DIANHYDRIDE, 1-PMDA, 1H,3H-Benzo(1,2-c;4,5-c’)difuran-1,3,5,7-tetrone, 201-898-9, 89-32-7, 1H,3H-Benzo[1,2-c:4,5-c’]difuran-1,3,5,7-tetrone, 1,2,4,5-Benzenetetracarboxylic dianhydride, 1H,3H-Benzo(1,2-c:4,5-c’)difuran-1,3,5,7-tetrone, furo[3,4-f][2]benzofuran-1,3,5,7-tetrone, pyromellitic dianhydride (PMDA), DTXSID1026536, NSC4798, Benzo[1,2-c:4,5-c’]difuran-1,3,5,7-tetraone, benzene-1,2,4,5-tetracarboxylic acid dianhydride, 1H,3H-furo[3,4-f][2]benzofuran-1,3,5,7-tetrone, DTXCID906536, CAS-89-32-7, furano[3,4-f]isobenzofuran-1,3,5,7-tetraone, Benzo[1,2-c, MFCD00005005, furo[3,4-f]isobenzofuran-1,3,5,7-tetrone, Oprea1_783432, SCHEMBL15763, Pyromellitic dianhydride, 97%, CHEMBL3182140, STR04559, Tox21_201714, Tox21_303118, SBB008218, STL477627, AKOS000120068, 4,5-c’]difuran-1,3,5,7-tetraone, PYROMELLITIC DIANHYDRIDE [HSDB], 5,11-dioxatricyclo[7.3.0.0^{3,7}]dodeca-1,3(7),8-triene-4,6,10,12-tetrone, NCGC00164170-01, NCGC00164170-02, NCGC00256972-01, NCGC00259263-01, 1.2.4.5-Benzenetetracarboxylic anhydride, AC-11735, DB-057127, B0040, NS00020125, P2103, ST51046488, EN300-18019, 1H,2-c:4,5-c’]difuran-1,3,5,7-tetrone, D92186, A916668, Pyromellitic Dianhydride (purified by sublimation), 1,4,5-Benzenetetracarboxylic 1,2:4,5-dianhydride, Q1407366, Z57127502, F0001-2194, 5,11-dioxatricyclo[7.3.0.0,3,7]dodeca-1,3(7),8-triene-4,6,10,12-tetrone, InChI=1/C10H2O6/c11-7-3-1-4-6(10(14)16-8(4)12)2-5(3)9(13)15-7/h1-2

Application

Pyromellitic Dianhydride (PMDA) is primarily used as a monomer for synthesizing thermally stable polyimides, which are critical in flexible printed circuits, semiconductor insulation, and high-temperature adhesives. It also serves as a crosslinking agent in epoxy resins to enhance thermal and mechanical properties in coatings and composites. In advanced materials, PMDA-derived polyimides are key to lightweight aerospace components and flame-resistant textiles.

Safety and Hazards

GHS Hazard Statements

• H315: Causes skin irritation [Warning Skin corrosion/irritation]
• H317: May cause an allergic skin reaction [Warning Sensitization, Skin]
• H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]
• H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled [Danger Sensitization, respiratory]
• H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
• H360: May damage fertility or the unborn child [Danger Reproductive toxicity]
• H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
• H401: Toxic to aquatic life [Hazardous to the aquatic environment, acute hazard]

Precautionary Statements

• P203, P233, P260, P261, P264, P264+P265, P270, P271, P272, P273, P280, P284, P302+P352, P304+P340, P305+P354+P338, P317, P318, P319, P321, P332+P317, P333+P317, P342+P316, P362+P364, P403, P403+P233, P405, and P501

Hazard Classes and Categories

• Skin corrosion/irritation – Category 2
• Serious eye damage/eye irritation – Category 1
• Respiratory sensitization – Category 1
• Skin sensitization – Category 1
• Reproductive toxicity – Category 1B
• Specific target organ toxicity – Single exposure – Category 3
• Specific target organ toxicity – Repeated exposure – Category 1
• Hazardous to the aquatic environment – Category 2

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.