Restek has MCHM standards available! Currently, it is a custom standard at a concentration of 1000 µg/mL prepared in P&T Methanol (Catalog #568935). If you require a solution at a different concentration or in a different solvent, you will need to obtain a quote for the product.
Currently, our Innovations team is working with the same solutions to review potential methods for testing. For an update on testing, see Chris Rattray’s more recent post.