Description

cis-1,2,3,6-Tetrahydro-4-Methylphthalic Anhydride is a versatile, reactive cyclic anhydride used as a key building block in advanced organic synthesis. Its value lies in its ability to introduce functionalized cyclohexene moieties and serve as a precursor for high-performance materials. This compound is essential for R&D chemists and manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries seeking to develop novel compounds and resins.

Application

• Pharmaceutical Intermediate: A crucial precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds with complex cyclic structures.
• Epoxy Resin Curing Agent & Modifier: Used to cure epoxy resins, imparting improved thermal stability, chemical resistance, and mechanical properties to the final polymer.
• Agrochemical Synthesis: Serves as a building block for creating advanced herbicides, fungicides, and plant growth regulators.
• Polyimide & Polyamide Precursor: A key monomer in the production of high-temperature, high-performance polymers for electronics and aerospace applications.
• Organic Synthesis Reagent: Employed in Diels-Alder reactions and other cycloadditions to construct complex polycyclic frameworks in fine chemical production.
• Crosslinking Agent: Used in coatings, adhesives, and composite materials to enhance durability and performance.

Basic Information

Product Name	cis-1,2,3,6-Tetrahydro-4-Methylphthalic Anhydride
CAS No.	1694-82-2
Molecular Formula	C9H10O3
Molecular Weight	166.17 g/mol
Synonyms	4-Methyl-4-cyclohexene-1,2-dicarboxylic anhydride; 4-Methyl-1,2,3,6-tetrahydrophthalic anhydride; 4-Methyl-δ4-tetrahydrophthalic anhydride; 4-MTHPA; MTHPA; cis-4-Methyl-1,2,3,6-tetrahydrophthalic anhydride; 4-Methyl-1-cyclohexene-1,2-dicarboxylic anhydride
EINECS	216-909-7

Quality Control

Our cis-1,2,3,6-Tetrahydro-4-Methylphthalic Anhydride is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including assay, impurity profiling, and physical property verification, to ensure it meets the high standards required for industrial and research applications. A comprehensive Certificate of Analysis (COA) is provided with every shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 purity and reactivity.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	65 - 70 °C
Water Content (KF)	≤ 0.5%

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