Malathion is an organophosphorous compound that inhibits cholinesterase enzyme activity. Malathion contains an interesting phosphinothioyl-thio ester as its active moiety where modification of acetylcholinesterase occurs. The action of Malathion on acetylcholinesterase has been correlated to prolonged modulation of the functioning of the cutaneous vasculature. Malathion is an organophosphate insecticide of relatively low human toxicity.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.