Description

Methyltetrahydrophthalic Acid CAS NO 27636-35-7 is a cycloaliphatic carboxylic acid derivative, serving as a key intermediate in the synthesis of high-performance polymers and specialty chemicals. Its value lies in its reactive anhydride functionality and hydrogenated ring structure, which contribute to enhanced thermal stability and weatherability in final products. This compound is essential for manufacturers in the coatings, epoxy resin, and plasticizer industries seeking to improve product durability and performance.

Application

• Epoxy Curing Agent Intermediate: A primary raw material for producing methyltetrahydrophthalic anhydride (MTHPA), a widely used epoxy resin hardener for electrical encapsulants and composites.
• Polymer Synthesis: Used in the production of alkyd resins, polyesters, and other polymers requiring a saturated, stable acid component.
• Plasticizer Production: Acts as a precursor for certain specialty plasticizers that offer low volatility and good compatibility with PVC and other polymers.
• Corrosion Inhibitor Formulations: Incorporated into coatings and lubricant additives where its chemical structure provides protective properties.
• Chemical Intermediate: Serves in organic synthesis for pharmaceuticals, agrochemicals, and other fine chemicals requiring a functionalized cycloaliphatic building block.
• Research & Development: Utilized in laboratory settings for developing new materials with specific thermal and mechanical properties.

Basic Information

Product Name	Methyltetrahydrophthalic Acid
CAS No.	27636-35-7
Molecular Formula	C9H12O4
Molecular Weight	184.19 g/mol
Synonyms	4-Methyl-1,2,3,6-tetrahydrophthalic Acid; 4-Methyl-δ4-tetrahydrophthalic Acid; Methyl-1,2,3,6-tetrahydrophthalic Acid; MTHP Acid; 4-Methyl-4-cyclohexene-1,2-dicarboxylic Acid; 4-Methyl-3,6-endoxo-δ4-tetrahydrophthalic Acid (related to anhydride form); 3-Methyl-4-cyclohexene-1,2-dicarboxylic Acid (isomer); Methyl hexahydrophthalic acid precursor
EINECS	Contact for details

Quality Control

Our Methyltetrahydrophthalic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing, including assay, impurity profile, and physical characteristic checks, to ensure it meets precise specifications for industrial applications. Certificates of Analysis (COA) documenting purity, acidity, 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 (typically 15-25°C). Keep away from strong bases, oxidizing agents, and sources of ignition. For long-term storage, consider under an inert atmosphere to maintain optimal quality.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Water Content (KF)	≤ 0.5%
Acid Value	Contact for details

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