MTHPA Price — China Factory EXW 2026

MTHPA price Spec: N/A

China EXW, VAT excluded

Newest China EXW USD 3,854.34 / MT · VAT excluded +8.0973 (0.21%) as of 20260402

Newest Price 3,854.34

Price Date 20260402

Day's Change +8.1

Day's Range 3,854.34 - 3,862.43

Month's Change -2,317.24

Month's Range 3,854.34 - 1,537.1

Year's Change +2,276.55

Year's Range 3,854.34 - 1,577.79

The battery electrolyte angle is an emerging niche worth monitoring. If MTHPA-based electrolytes gain traction in next-gen lithium batteries, it could open a new demand stream beyo...

Also known as 3a-methyl-5,6-dihydro-4H-isobenzofuran-1,3-dione, 1,3-Isobenzofurandione, 3a,4, 1,3-Isobenzofurandione, tetrahydromethyl, 1,3-Isobenzofurandione, tetrahydromethyl-

Opinions

What are the main application segments for methyl tetrahydrophthalic anhydride beyond epoxy curing?

The battery electrolyte angle is an emerging niche worth monitoring. If MTHPA-based electrolytes gain traction in next-gen lithium batteries, it could open a new demand stream beyond traditional epoxy markets. For now, electrical insulation remains the core volume driver, but diversification reduces single-sector risk.

What drives methyl tetrahydrophthalic anhydride demand in epoxy potting compounds?

The shift toward liquid MTHPA over solid aromatic amines is notable. Its low melting point, low volatility, and miscibility with epoxy resins simplify handling and improve process consistency. Watch capacity expansions from major Chinese producers, as supply additions could pressure pricing despite firm downstream demand.

How is China's MTHPA production capacity evolving and who are the key players?

Beyond capacity, process technology is the real differentiator. Continuous production improves batch-to-batch consistency, which is critical for high-end electrical insulation applications. Buyers should qualify suppliers on quality stability, not just price, as the market transitions from batch to continuous manufacturing.

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MTHPA price context

What drives MTHPA prices

What are the main application segments for methyl tetrahydrophthalic anhydride beyond epoxy curing?: The battery electrolyte angle is an emerging niche worth monitoring. If MTHPA-based electrolytes gain traction in next-gen lithium batteries, it could open a ne...

What drives methyl tetrahydrophthalic anhydride demand in epoxy potting compounds?: The shift toward liquid MTHPA over solid aromatic amines is notable. Its low melting point, low volatility, and miscibility with epoxy resins simplify handling ...

How we assess MTHPA price

China factory / mainstream market EXW quotes (VAT excluded where shown) - not a single global public index

Regional and specification detail so buyers can compare like-for-like grades

Landed cost figures from our calculator are planning estimates, not a customs ruling

Overview

3a-methyl-5,6-dihydro-4H-isobenzofuran-1,3-dione (2-methyltetrahydrophthalic anhydride, MTHPA, CAS 19438-64-3) is a low-viscosity liquid anhydride with a density of 1.21 g/cm³, a boiling point of 120 °C at 3 mmHg, and solubility in water. It functions primarily as an epoxy resin curing agent, imparting good mechanical, electrical insulation, and chemical resistance properties to cured products.

Epoxy curing: reacts readily with epoxy resins to form crosslinked networks for composites, coatings, and electrical insulation applications.
Industrial: used in the production of alkyd resins, plasticisers, and other specialty anhydride derivatives.
Electronics: serves as a curing agent in electronic-grade epoxy systems for encapsulation and laminates.

China's MTHPA market is dominated by industrial-grade product, with domestic capacity concentrated among a few major producers. The country is a net exporter of standard grades, while high-purity electronic-grade material still relies partly on imports. Capacity expansion projects, including a 20,000-tonne/year MTHPA unit, are underway to meet growing downstream demand.

Key domestic producers:
Puyang Huicheng Electronic Material – leading producer with expanding maleic anhydride derivative capacity.
Nan Ya Plastics – active in the Chinese MTHPA market.
Jiaxing Nanyang Wanshixing Chemical – established domestic supplier.
Wuhan Ruiji Chemical – participant in the industrial-grade segment.

Properties

Name

MTHPA

3a-methyl-5,6-dihydro-4H-isobenzofuran-1,3-dione

1,3-Isobenzofurandione, 3a,4

1,3-Isobenzofurandione, tetrahydromethyl

1,3-Isobenzofurandione, tetrahydromethyl-

CAS Number

19438-64-3

EINECS No.

234-290-7

Risk Codes

S26;S36/37/39;S37/39;S24;S22

Safety Description

R36/37/38;R42/43;R41

HS Code

2917209090

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