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MTHPA (Methyl Tetrahydrophthalic Anhydride)

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Name: Methyltetrahydrophthalic anhydride, MTHPA.
Product No: E1001
CAS No: 11070-44-3 or 26590-20-5
Formula: C9H10O3
Formula Weight: 166.17

Methyl Tetrahydrophthalic Anhydride (MTHPA) is a versatile liquid anhydride hardener. The product remains liquid in cold environments (typical pour point -20c to -15c). It provides unique characteristics to epoxy cured materials. MTHPA often is the product of choice in high voltage and temperature resistance environments. The characteristics of MTHPA also provide for excellent flexibility and strength properties. Markets using MTHPA include marine, composites, windmill blade coatings, construction, insulating, medical and sporting equipment.


Epoxy resin curing agents, Epoxy Harnener,solvent free paints, laminated boards, epoxy adhesives, etc. With the many advantages, e.g. long-term storage at room temperature, low freezing point, small volatilization and low toxicity, MTHPA is widely used in electric machines, dry-type transformers, high voltage switches, mutual inductance equipments, horizontal output transformers, household appliances capacitors, power capacitors and resistances, and the impregnating, casting and wrapping of integrated circuits.


 Items                     Methyltetrahydrophthalic anhydride
 Appearance                         slightly yellow liquid
 Anhydride                                        41% Min
 Volatile Content                                  1.0% Max
 Free Acid (mgKOH/g)                                  1.0% Max
 Freezing Point (oC)                                  -15 Max
 Viscosity (25o C)mPa.s                                  30-50

Package: MTHPA is packed in 240KG or 220kg galvanized iron drums.It should be stored in cool, dry places and keep away from moisture.

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