1,2,4-Benzenetricarboxylic anhydride CAS 552-30-7

1,2,4-Benzenetricarboxylic anhydride, commonly known as trimellitic anhydride (TMA), is a chemical compound with the CAS number 552-30-7. It has a molecular formula of C₉H₄O₅ and a molecular weight of 192.13 g/mol. This compound is primarily used in various industrial applications due to its properties as a curing agent and plasticizer.
Applications:
Plasticizers: TMA is widely utilized to produce heat-proof, weather-proof, and solvent-proof trimellitate plasticizers, which are essential in enhancing the flexibility and durability of plastics.
Resins and Coatings: It serves as a curing agent for epoxy resins and is involved in the synthesis of polyester resins, contributing to the production of heat-proof varnishes and insulated laminates.
Other Uses: TMA is also employed in the formulation of adhesives, dyestuffs, pigments, surfactants, and agricultural chemicals. Its versatility extends to applications in high-class aero oils and impregnating oils for power capacitors.
Physical Properties:
Solubility: TMA is soluble in organic solvents such as ethanol and acetone but hydrolyzes in water. It is moisture-sensitive and should be stored under inert gas to prevent degradation.
Safety Considerations: The compound can cause serious eye damage and may lead to respiratory issues if inhaled. Proper safety measures should be taken when handling TMA to avoid skin and respiratory irritation.
In summary, 1,2,4-Benzenetricarboxylic anhydride is a significant chemical in the production of various materials, particularly in the plastics and coatings industries, while also requiring careful handling due to its potential health hazards.