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CAS No. 89-32-7
Benzene tetracarboxylic acid dianhydride, abbreviated as homoanhydride, is a white or slightly yellow crystal in pure form. When exposed to humid air, it will quickly absorb the moisture in the air and hydrolyze into benzene tetracarboxylic acid. It is soluble in organic solvents such as dimethyl sulfoxide, dimethyl formamide, acetone and insoluble in ether, chloroform and benzene.
Applications
Phenylene tetracarboxylic acid dianhydride (PMDA) is the raw material for the production of polyimide film (PI film), polyimide resin, high temperature electrical insulating varnish, high temperature resistant paint, and also used in the production of epoxy resin curing matting agent and polyester resin crosslinking agent, powder coating additives and so on.
| Name | 1,2,4,5-Benzenetetracarboxylic anhydride |
| Synonyms | PMDA Pyromelliticanhydride PyromelliticDianhydride Pyromellitic dianhydride pyromelliticacidanhydride pyromelliticaciddianhydride 1,2,4,5-BENZENETETRACARBOXYLIC ANHYDRIDE 1,2,4,5-Benzenetetracrboxylicdianhydride 1,2,4,5-Benzenetetracarboxylic anhydride 1,2,4,5-Benzenetetracarboxylic dianhydride |
| Molecular Formula | C10H2O6 |
| Molar Mass | 218.12 |
| Density | 1,68 g/cm3 |
| Melting Point | 283-286°C(lit.) |
| Boling Point | 397-400°C(lit.) |
| Flash Point | 380 °C |
| Water Solubility | decomposes |
| Solubility | Soluble in dimethyl sulfoxide, acetone, chloroform, ethyl ether, n-hexane and benzene. |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | Fine Powder |
| Color | White to pale yellow |
| BRN | 213583 |
| pKa | 5.45[at 20 ℃] |
| Sensitive | Moisture Sensitive |
| Refractive Index | 1.6000 (estimate) |
| Physical and Chemical Properties | Properties White yellowish lump powder solid crystal soluble in dimethyl sulfoxide, dimethyl formamide, acetone. |
| Use | Used in the preparation of polyimide resin, high temperature resistant electrical insulation paint, PVC plasticizer, synthetic resin crosslinking agent and epoxy resin curing agent, also used in the preparation of phthalocyanine blue dye |
| Hazard Symbols | Xn – Harmful |
| Risk Codes | R41 – Risk of serious damage to eyes R42/43 – May cause sensitization by inhalation and skin contact. |
| Safety Description | 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 |
| FLUKA BRAND F CODES | 10-21 |
| TSCA | Yes |
| HS Code | 29173980 |
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