Description

Tris(1,3-Dihydro-1,3-Dioxo-5-Isobenzofurancarboxylic Acid)1,2,3-Propanetriyl Ester is a specialized organic ester compound, also known as trimellitic acid tris(anhydride) or the trianhydride of trimellitic acid. This high-purity chemical intermediate is valued for its trifunctional reactivity, enabling the synthesis of advanced polymers and cross-linked materials with enhanced thermal and mechanical properties. It is essential for manufacturers in the polymer, resin, and specialty chemical industries seeking to develop high-performance coatings, adhesives, and engineering plastics.

Application

• As a key cross-linking agent and monomer in the production of high-temperature resistant polyimide resins and films.
• In the synthesis of epoxy curing agents and hardeners for advanced composite materials and electronic encapsulants.
• For manufacturing alkyd resins and polyester coatings that require improved durability, gloss, and chemical resistance.
• As an intermediate in the production of plasticizers and modifiers for specialty polymers like PVC.
• In the formulation of adhesives and sealants where thermal stability and strong bonding are critical.
• For research and development of novel dendrimers and hyperbranched polymers with precise molecular architecture.

Basic Information

Product Name	Tris(1,3-Dihydro-1,3-Dioxo-5-Isobenzofurancarboxylic Acid)1,2,3-Propanetriyl Ester
CAS No.	3543-39-3
Molecular Formula	C24H12O12
Molecular Weight	492.35 g/mol
Synonyms	Trimellitic Anhydride Acid Chloride; 1,2,4-Benzenetricarboxylic Acid 1,2-Anhydride; Trimellitic Acid Trianhydride; TMA-TA; Tris(trimellitic anhydride); 4-Carboxyphthalic Anhydride Trimer; Anhydrotrimellitic Acid; NSC 403108
EINECS	222-577-1

Quality Control

Our production of Tris(1,3-Dihydro-1,3-Dioxo-5-Isobenzofurancarboxylic Acid)1,2,3-Propanetriyl Ester adheres to stringent quality management protocols. Each batch is analyzed to ensure high purity and consistency, meeting the exacting standards required for advanced polymer synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.