Description

Hexahydro-4-Methylphthalic Anhydride is a specialized, saturated cyclic anhydride widely used as a key intermediate in high-performance polymer synthesis. Its value lies in its ability to impart enhanced thermal stability, chemical resistance, and mechanical properties to final products. This compound is essential for manufacturers in the epoxy resin, plasticizer, and specialty chemical industries seeking to develop advanced materials.

Application

• Epoxy Resin Curing Agent: A critical component for curing epoxy systems, contributing to improved heat resistance and electrical insulation properties in coatings, adhesives, and composite materials.
• Polymer Intermediate: Serves as a building block for synthesizing polyimide resins, polyester resins, and alkyd resins, which are used in high-temperature and durable industrial applications.
• Plasticizer Production: Used in the manufacture of certain plasticizers to enhance the flexibility and longevity of PVC and other polymeric compounds.
• Chemical Synthesis: An important reagent in organic synthesis for introducing the hexahydrophthalic moiety into more complex molecules for pharmaceuticals and agrochemicals.
• Corrosion Inhibitor Precursor: Employed in the formulation of additives for lubricants and fuels that protect metal surfaces.
• Specialty Additives: Used in the production of flame retardants and stabilizers for various polymer matrices.

Basic Information

Product Name	Hexahydro-4-Methylphthalic Anhydride
CAS No.	19438-60-9
Molecular Formula	C9H12O3
Molecular Weight	168.19 g/mol
Synonyms	4-Methylhexahydrophthalic Anhydride; 4-Methyl-1,2-cyclohexanedicarboxylic Anhydride; 4-Methyl-HHPA; Methylhexahydrophthalic Anhydride; 4-Methyl-4-cyclohexene-1,2-dicarboxylic Anhydride (hydrogenated); MHHPA; Hexahydro-4-methyl-1,3-isobenzofurandione
EINECS	243-072-0

Quality Control

Our Hexahydro-4-Methylphthalic Anhydride is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, acidity, and color. Certificates of Analysis (COA) detailing the results of tests such as assay, melting point, and moisture content 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, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	60 - 70 °C
Acidity (as Phthalic Acid)	≤ 1.0 %
Color (APHA)	≤ 100
Moisture (Karl Fischer)	≤ 0.5 %

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