| Customization: | Available |
|---|---|
| CAS No.: | 11070-44-3 |
| Formula: | C9h10o3 |
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Methyltetrahydrophthalic anhydride is also known as methyltetrahydrophthalic anhydride, MeTHPA for short. It has two isomers, namely 4-methyltetrahydrophthalic anhydride and 3-methyltetrahydrophthalic anhydride, with melting points of 65°C and 63°C respectively. It is rarely used alone as a curing agent. The actual product is a liquid mixture of multiple isomers. Molecular weight 166.17. Light yellow transparent oily liquid, relative density 1.20~1.22. Freezing point <-20°C. Boiling point 115~155°C. Viscosity (25°C) 40~80mPa·s. Refractive index 1.4960~1.4980. Anhydride content ≥40%. Neutralization equivalent 81~85. Flash point 137~150°C. Soluble in acetone, ethanol, etc. Good stability in air, not easy to precipitate crystals. Low toxicity, LD502102mg/kg.
| Test item | Specification | Result |
| Appearance | Colorless or light yellow liquid | Light yellow liquid |
| Viscosity mPa-S(25ºC) | 30-70 | 43 |
| Anthydride Group Content | ≥41.0 | 42.3 |
| Freezing point ºC | ≤-15 | <-15 |
| Volatile Content % | ≤1.0 | 0.62 |
| Free Acid % | ≤1.0 | 0.09 |
| Conclusion: | The results conforms with enterprise standards | |
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