Description

Trimellitic Anhydride is a versatile and high-performance aromatic anhydride monomer essential for producing advanced polymers and specialty chemicals. Its trifunctional structure enables the synthesis of materials with superior thermal stability, mechanical strength, and chemical resistance, making it a critical raw material for demanding industrial applications. This compound is primarily sought by manufacturers in the plastics, coatings, adhesives, and electronics industries for creating high-value, durable end-products.

Application

• Plasticizer Precursor: Key intermediate in the production of high-performance trimellitate plasticizers (e.g., trioctyl trimellitate, TOTM), which provide exceptional heat resistance and low volatility for PVC wire and cable insulation, automotive interiors, and other durable goods.
• High-Temperature Polymers: A core monomer for manufacturing polyimide resins and polyamide-imides (PAI), used in high-temperature adhesives, insulating varnishes for electric motors, and advanced engineering plastics for aerospace and electronics.
• Powder Coatings & Resins: Used to synthesize polyester and alkyd resins that enhance the durability, gloss, and weatherability of industrial and architectural powder coatings.
• Epoxy Curing Agents: Serves as a curing agent or hardener for epoxy resin systems, improving their thermal and chemical resistance for composite materials and high-performance adhesives.
• Water Treatment Chemicals: Employed in the synthesis of scale and corrosion inhibitors for industrial water treatment and cooling systems.
• Specialty Intermediates: A valuable building block for synthesizing dyes, pigments, pharmaceuticals, and other fine chemicals requiring a robust aromatic backbone.

Basic Information

Product Name	Trimellitic Anhydride
CAS No.	552-30-7
Molecular Formula	C9H4O5
Molecular Weight	192.13 g/mol
Synonyms	1,2,4-Benzenetricarboxylic Anhydride; 1,2,4-Benzenetricarboxylic Acid Anhydride; TMA; Anhydrotrimellitic Acid; 4-Carboxyphthalic Anhydride; Trimellitic Acid Anhydride; Benzene-1,2,4-tricarboxylic Acid 1,2-Anhydride
EINECS	209-008-0

Quality Control

Our Trimellitic Anhydride is manufactured under a stringent quality management system to ensure batch-to-batch consistency and high purity. Each lot is tested against rigorous internal specifications, which typically include assay, melting point, color, and impurity profile analysis. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your technical requirements.

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); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can lead to hydrolysis and reduced reactivity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 99.0 %
Melting Point	161 - 165 °C
Color (APHA)	≤ 50
Acidity (as TMA)	≤ 0.5 %
Moisture (KF)	≤ 0.5 %

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