Chemical Name: Hexahydro-4-methylphthalic anhydride
CAS No.: 19438-60-9
Appearance: Colorless transparent liquid
Packing: 25 kg/drum
Purity: ≥ 98.0% / 99.0%
Hexahydro-4-methylphthalic anhydride CAS 19438-60-9
Description
Hexahydro-4-methylphthalic anhydride Details
Chemical Name: Hexahydro-4-methylphthalic anhydride
Synonyms: 4-Methylhexahydrophthalic anhydride; MHHPA
CAS No.: 19438-60-9
Molecular Formula: C9H12O3
Molecular Weight: 168.19
Molecular Structure:
Appearance: Colorless transparent liquid
Purity: ≥ 98.0% / 99.0%
Hexahydro-4-methylphthalic anhydride Typical Properties
| Item | Specifications |
| Appearance | Colorless transparent liquid |
| Color (platinum-cobalt) | less than 5# |
| Iodine value | <1% |
| Free acid | < 0.5% |
| Acid value (mg KOH/g) | > 645 |
| Freezing point | ＜ -15°C |
| Boiling point | 280 – 285°C at 760 mmHg / 135-137°C at 10 mmHg |
| Density | 1.150 – 1.165 g/cm³ at 20°C |
| Viscosity | 40 – 70 mPa·s at 25°C |
| Flash point | 150 – 156°C |
Hexahydro-4-methylphthalic anhydride Usage
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High-End Epoxy Resin Hardener (Core Absolute Application): Serves as one of the premier liquid anhydride curing agents across modern electronic packaging and composite engineering industries.
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Electronic Encapsulation & LED Optics: Due to its light color, ultralow viscosity, and outstanding thermal stability, dielectric properties, weatherability, and yellowing resistance, it is extensively used in LED encapsulants, electronic potting compounds, and high-voltage insulators.
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Composites & Filament Winding: Deployed in manufacturing fiber-reinforced polymers (FRP), gas-tight insulated pipes, wind turbine blades, and Vacuum Pressure Impregnation (VPI) resins for motor coils. Compared to amine hardeners, anhydride systems offer longer pot life, lower exothermicity, and superior mechanical toughness.
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Weather-Resistant Polyester & Coatings Modifier: Utilized to synthesize high-performance specialty polyester resins, alkyd resins, and crosslinking modifiers for UV-curable coatings.
Hexahydro-4-methylphthalic anhydride Packaging and Shipping
Packing: 250kg/drum
Hexahydro-4-methylphthalic anhydride Storage
It should be sealed and shaded to be stored in a dry, cool, well ventilated place.