The froehde reagent is ideal as it has a very long shelf life. It lasts over 12 months if stored in the fridge and about 12 months if kept outside the fridge in a cool, dark place. One bottle will give approximately 40 tests.
It will detect PMA and PMMA, giving a pale green reaction for either.
As with all reagent tests, the froehde reagent contains strong acid and should be handled with care.
Includes reaction result guide for common compounds.
Please note that this product is a matrix-bound test, not a liquid.