Methyltetrahydrophthalic Anhydride (MTHPA)

Methyltetrahydrophthalic Anhydride (MTHPA), CAS 11070-44-3

Methyltetrahydrophthalic Anhydride, CAS 11070-44-3, is an organic acid anhydride with the molecular formula C9H10O3 and a molecular weight of 166.17. It is also known as Tetrahydromethylphthalic Anhydride, Methyltetrahydroisophthalic Anhydride and Methylcyclohexene-1,2-dicarboxylic Anhydride.

MTHPA is commonly supplied as a colorless to pale yellow liquid and is widely used as an anhydride curing agent for epoxy resin systems.

Methyltetrahydrophthalic Anhydride reacts with epoxy resins to form cured thermosetting materials with good electrical insulation, mechanical strength and thermal performance. It is particularly suitable for casting, encapsulation and electrical insulation applications.

Product Chemical Properties

Product Name: Methyltetrahydrophthalic Anhydride

CAS No.: 11070-44-3

EC No.: 234-290-7

Molecular Formula: C₉H₁₀O₃

Molecular Weight: 166.17

Chemical Name: Methyltetrahydrophthalic Anhydride

Chemical Type: Organic Acid Anhydride / Epoxy Curing Agent

Synonyms: MTHPA, Tetrahydromethylphthalic Anhydride, Methyltetrahydroisophthalic Anhydride, Methylcyclohexene-1,2-dicarboxylic Anhydride

Product Technical Specification

Appearance                                                    Transparent liquid, free from visible mechanical impurities 

Color / Hazen units (Platinum-Cobalt scale)         ≤300                   ≤200                ≤100                  ≤50 

Density (25 ℃) / (g/mL)                                                                         1.21±0.05 

Crystallization                                                       test Pass test at -15 ℃                    Pass test at 0 ℃ 

Viscosity (25 ℃) / (mPa·s)                                       ≤60                    ≤50                              ≤45 

Acid value / (mgKOH/g)                                                    650~685                                   660~685 

Anhydride group content (as C₂O₃), w/%                                                    ≥40.5 

Loss on heating, w/%                                                                                  ≤1.50 

Free acid (as COOH), w/%                                                                         ≤0.50

Applications of Methyltetrahydrophthalic Anhydride

Used in epoxy resin curing agents, solvent-free paints, laminates, epoxy adhesives, etc. As an epoxy resin curing agent, it offers excellent properties, including long-term room-temperature stability, a low freezing point, low volatility, and low toxicity.

It is widely used in the impregnation, casting and winding of motors, dry-type transformers, high-voltage switches, instrument transformers, line output transformers, household appliance capacitors, power capacitors and resistors, and integrated circuits.

Packaging

220kg/drum, 1200kg/IBC

Production Capacity

9000MT/year

Storage Requirements

Stored away from light, sealed, and moisture, and kept away from fire sources. 

Shelf life is one year.

Methyltetrahydrophthalic Anhydride Bulk Supply from China

Hosea Chem® offers Methyltetrahydrophthalic Anhydride (MTHPA), CAS 11070-44-3, also known as Tetrahydromethylphthalic Anhydride, in bulk quantities with competitive factory-direct pricing and professional export service.

The product can be supplied according to agreed purity, viscosity, color, packaging and technical requirements for qualified industrial customers.

TDS, MSDS and COA are available upon request.

Contact Hosea Chem for the latest Methyltetrahydrophthalic Anhydride (MTHPA) price, bulk quotation, availability and technical documents.

Fine Chemicals

Methylhexahydrophthalic Anhydride

Methyltetrahydrophthalic Anhydride (MTHPA)

Sodium lauroyl sarcosinate 30%

2,3-Dimethyl-2,3-diphenylbutane

Tris(2,3-dibromopropyl) Isocyanurate (TBC)

1,1-Bis(t-butyl peroxy)-3,3,5-trimethylcyclohexane