Description

3-Methyltetrahydrophthalic Anhydride is a versatile and highly reactive cyclic anhydride used as a key intermediate in the synthesis of advanced polymers and fine chemicals. Its primary commercial value lies in its role as a curing agent for epoxy resins, imparting excellent thermal stability, chemical resistance, and mechanical properties to the final product. This compound is essential for manufacturers in the electronics, coatings, adhesives, and composite materials industries seeking to enhance product performance and durability.

Application

• Primary curing agent and hardener for epoxy resin systems.
• Intermediate in the production of alkyd resins, plasticizers, and corrosion inhibitors.
• Key raw material for synthesizing specialty polyimide precursors and other high-performance polymers.
• Used in the formulation of electrical insulation materials, potting compounds, and encapsulants.
• Component in adhesives and sealants for automotive and aerospace applications.
• Building block for agricultural chemicals and pharmaceutical intermediates.
• Used in research and development for novel polymer chemistry.

Basic Information

Product Name	3-Methyltetrahydrophthalic Anhydride
CAS No.	5333-84-6
Molecular Formula	C9H10O3
Molecular Weight	166.17 g/mol
Synonyms	3-Methyl-1,2,3,6-tetrahydrophthalic anhydride; 4-Methyltetrahydrophthalic anhydride; 3-Methyl-4-cyclohexene-1,2-dicarboxylic anhydride; MTHPA; Methyltetrahydrophthalic Anhydride; 3-Methyl-δ4-tetrahydrophthalic anhydride; 3-Methyl-4-cyclohexene-cis-1,2-dicarboxylic anhydride
EINECS	226-235-0

Quality Control

Our 3-Methyltetrahydrophthalic Anhydride is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, acidity, and color. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and 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) and should be kept under dry conditions to prevent hydrolysis. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or low-melting solid
Identification (IR)	Conforms
Assay (Anhydride Content)	≥ 98.0 %
Acidity (as Phthalic Acid)	≤ 1.0 %
Color (APHA)	≤ 100
Water Content	≤ 0.1 %

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