The result is a long chain of polybutadiene criss crossed with shorter chains of poly(styrene co acrylonitrile).

And because these materials are so prolific, because they're found in so many places, there's one other place you'll find this material, styrene, which is made from benzene, a known carcinogen.

Global drug testing capacities have been extended through the development of new precursor field tests, now being used successfully by Afghan forces for the identification of not only drugs and acetic anhydride, but also other non controlled substances used in the processing of heroin.