4-methylhexahydrophthalic anhydride
CAS 19438-60-9
EC 243-072-0
Formula C9H12O3
MW 168.19 g/mol
Monomers & Building Blocks Plastics & PolymersCoatings, Adhesives, Sealants & ElastomersElectronics Cross-linking & CuringPolymerization Initiation
Description
4-methylhexahydrophthalic anhydride (CAS 19438-60-9, EC 243-072-0) is a cycloaliphatic anhydride monomer supplied as a clear liquid, also known under trade designations WH 700, Rikacid MH, and NSC 128883. It carries no assigned E-code and is classified within the monomers and building blocks category.
In epoxy resin formulations, it functions as a hardener by reacting with epoxide groups to form ester crosslinks, producing thermoset networks with good thermal and electrical resistance. This curing mechanism makes it applicable in encapsulants and potting compounds for electronic components, as well as in structural adhesives and coatings where controlled crosslink density is required.
The product is registered under REACH and available in standard industrial liquid packaging formats. Procurement teams should confirm supplier documentation for SDS compliance and purity specifications relevant to their formulation requirements. No FCC or Ph.Eur. grade designations apply to this material.
In epoxy resin formulations, it functions as a hardener by reacting with epoxide groups to form ester crosslinks, producing thermoset networks with good thermal and electrical resistance. This curing mechanism makes it applicable in encapsulants and potting compounds for electronic components, as well as in structural adhesives and coatings where controlled crosslink density is required.
The product is registered under REACH and available in standard industrial liquid packaging formats. Procurement teams should confirm supplier documentation for SDS compliance and purity specifications relevant to their formulation requirements. No FCC or Ph.Eur. grade designations apply to this material.
Physical Properties
| Melting Point | -29 °C |
| Boiling Point | 120°C (1 mmHg) |
| Density | 1.16 g/cm³ |
| Flash Point | >230 °F |
| Appearance | clear liquid |
| Color | Clear |
| Form | Liquid |
| Water Solubility | REACTS |
| Vapor Pressure | 0.23Pa at 25℃ |
| Refractive Index | n 20/D 1.477(lit.) |
| Log P | -3.95 at 20℃ |
Safety & Handling (Learn More)
Danger GHS05 GHS08 GHS07
H
H317H318H334
P
P233P260P261P271P272P280P284P317P321P403P501P264+P265P302+P352P304+P340P333+P317P342+P316P362+P364P305+P354+P338
Trade & Regulatory
| HS Code | 29172090 |
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 1 |
Other Names
5-methyl-3a,4,5,6,7,7a-hexahydro-2-benzofuran-1,3-dioneMHHPAWH 700Rikacid MhMETHYLHEXAHYDROPHTHALIC ANHYDRIDEHEXAHYDRO-3-METHYLPHTHALIC ANHYDRIDEHexahydro-4-methylphthalic anhydride
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