Methyltetrahydrophthalic Anhydride – MTHPA


Methyltetrahydrophthalic Anhydride (MTHPA) is a derivative of phthalic anhydride, characterized by the presence of a methyl group and additional hydrogen atoms, which make it a tetrahydro compound. Methyl Tetra Hydro Phthalic Anhydride (MTHPA) is widely used as a curing agent in epoxy resins. These anhydride hardeners are less toxic, have a longer pot life, and produce less heat than amine hardeners.


MTHPA - Methyl Tetra Hydro Phthalic Anhydride - Barrel
MTHPA – Methyltetrahydrophthalic Anhydride Manufacturer

Properties of Methyltetrahydrophthalic Anhydride – MTHPA

  • Appearance: Colorless to pale yellow liquid
  • Mechanical Performance: High bonding strength enhances the mechanical properties of materials, including tensile strength, shear strength, and impact resistance. This ensures that the materials can withstand mechanical stresses without failing.
  • Excellent Electrical Insulation: MTHPA-cured products possess excellent electrical insulation properties, crucial for electronic and electrical applications.
  • Chemical Reactivity: MTHPA’s anhydride group reacts effectively with epoxy groups, forming strong covalent bonds. This chemical interaction results in a highly cross-linked polymer network.
  • Efficient Curing: MTHPA promotes efficient curing at lower temperatures compared to other curing agents. This controlled curing process helps in achieving optimal bonding properties without compromising the material’s structural integrity.
  • Durability: Strong bonds contribute to the longevity of materials, reducing the frequency of repairs and replacements. This is particularly important in industries where reliability is paramount, such as aerospace, automotive, and construction.
  • Low Viscosity: Its low viscosity allows for easy mixing and processing, facilitating smoother manufacturing processes.

Applications of Methyltetrahydrophthalic Anhydride – MTHPA

  • Aerospace
  • Automotive
  • Adhesives
  • Construction
  • Structural Repairs
  • Fiberglass Reinforced Plastics (FRP)
  • GFRP Rebars / FRP Rebars
  • Marine
  • Sealants


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Storage and Handing of Anhydride Hardener

  • Keep in cool, dry, ventilate condition and in closed containers.
  • Keep away from heat sources and direct sunlight.
  • Recommended safe handling procedures are discussed in the information on the MSDS should review and understand before working.
  • Ventilation: Ensure adequate ventilation in areas where MTHPA is used to avoid inhalation of vapors.


Additional Information on Methyl Tetrahydrophthalic Anhydride

  • Other Names: Methyltetrahydrophthalicanhydride, MTHPA, Methyl Tetra Hydro Phthalic Anhydride, Hydrophthalic Anhydride, MTHPA Anhydride, Anhydride Hardener, methyl tetrahydrophthalic anhydride.
  • Molecular Formula: C9H10O3
  • CAS No: 11070-44-3


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Why to Choose Our System for Methyltetrahydrophthalic Anhydride?

  • Quality Assurance: Our product undergoes rigorous testing to ensure consistent quality and performance, meeting industry standards and surpassing customer expectations.
  • Technical Support: Backed by a team of experienced professionals, we provide comprehensive technical support and guidance to assist with product selection, application techniques, and project specifications.
  • Regular Availability:  We maintain regular stocks of our products & have multiple customers across India.
  • Sustainability: Committed to sustainability, our epoxy resin formulation complies with environmental regulations and contributes to green building initiatives, promoting responsible construction practices.
  • Logistic Partners: We have tied up with 50+ Logistics providers to ensure swift movement of the material.
  • Chemex Chemicals manufactures Methyltetrahydrophthalic Anhydride (MTHPA) in India.


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