Description

Methyl Tetrahydrophthalic Anhydride CAS NO 19438-64-3 is a versatile, low-viscosity liquid anhydride curing agent primarily used in epoxy resin systems. Its core value lies in providing excellent mechanical properties, thermal stability, and chemical resistance to cured epoxy products, making it a critical component in high-performance composites and coatings. This product is essential for manufacturers in the electronics, aerospace, and automotive industries seeking reliable, high-strength polymer materials.

Application

• Epoxy Resin Curing Agent: Primary use as a hardener for epoxy resins in electrical encapsulation, potting compounds, and structural adhesives.
• Composite Materials: Production of fiber-reinforced plastics (FRP) for automotive parts, wind turbine blades, and sporting goods.
• Electrical Laminates: Key component in the manufacture of printed circuit boards (PCBs) and insulating varnishes.
• Industrial Coatings: Formulation of high-durability, chemical-resistant coatings for pipelines, tanks, and industrial flooring.
• Tooling and Molding: Used in epoxy tooling systems for prototypes and composite molds due to low shrinkage and good dimensional stability.

Basic Information

Product Name	Methyl Tetrahydrophthalic Anhydride
CAS No.	19438-64-3
Molecular Formula	C9H10O3
Molecular Weight	166.17 g/mol
Synonyms	4-Methyl-1,2,3,6-tetrahydrophthalic anhydride; MTHPA; Methyl-4-cyclohexene-1,2-dicarboxylic anhydride; 4-Methyltetrahydrophthalic anhydride; Methyl hexahydrophthalic anhydride (common trade name reference); METHPA; Anhydrid kyseliny methyltetrahydroftalove; Methyl-δ4-tetrahydrophthalic anhydride
EINECS	243-072-0

Quality Control

Our Methyl Tetrahydrophthalic Anhydride is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including assay, acid value, and color determination, to ensure it meets precise industry specifications. Certificates of Analysis (COA) documenting purity, viscosity, and other critical parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C/59-77°F). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Assay (GC)	≥ 98.0 %
Acid Value	650 - 670 mg KOH/g
Viscosity (25°C)	25 - 50 mPa·s
Color (Gardner)	≤ 2
Moisture (Karl Fischer)	≤ 0.1 %

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