The Anhydrides Joint Industry Taskforce is representing the producers/importers, formulators, and end-users of the substances Hexahydrophthalic Anhydride (HHPA) and Methylhexahydrophthalic Anhydride (MHHPA). These anhydrides are currently under regulatory pressure, due to their respiratory sensitising properties, and might fall under authorisation in the future. The AJIT was set up to:
- Collect socio-economic information on the use of anhydrides
- Gather information on exposure levels and risks associated with anhydrides and spread best practices on material handling and protective measures in view of continuous improvement
- Inform regulatory authorities of possible risk management options for the use of Anhydrides
The structure of the industry using anhydrides is displayed. All manufactures/importers and the majority of formulators of anhydrides have joined the Anhydrides Joint Industry Taskforce.
End users are operating mainly in the electro-technical industry; the anhydrides are used as a monomer in a polymerization reaction with epoxy to produce a thermoset with unique electrical insulation properties.
As anhydrides are used as a monomer in a polymerisation reaction to form a polymer which electrically isolates switchgear and high voltage rotating devices, they are no longer pressent in the final article. The production process only occurs in an industrial setting.