Participants analyze samples for the presence/identity of controlled substances. Available to U.S. laboratories with a DEA registration number and international laboratories pending appropriate documentation. Samples ship in March.

Participants analyze samples for the presence/identity of controlled substances. Available to U.S. laboratories with a DEA registration number and international laboratories pending appropriate documentation. Samples ship in September.

Participants analyze samples for the presence/identity of controlled substances. Test items are completely randomized and available for purchase on-demand. Available to U.S. laboratories with a DEA registration number only.

Participants analyze samples for the presence of marihuana and have the option to quantitate THC. Available to U.S. laboratories with a DEA registration number and international laboratories pending appropriate documentation. Samples ship in June.

Participants analyze samples for the presence/identity of controlled synthetic drug substances. Available to U.S. laboratories with a DEA registration number and international laboratories pending appropriate documentation. Samples ship in July.

Participants determine the concentration of two Methamphetamine Hydrochloride samples. Available to U.S. laboratories with a DEA registration number and international laboratories pending appropriate documentation. Samples ship in May.

Participants determine the concentration of two Cocaine Hydrochloride samples. Available to U.S. laboratories with a DEA registration number and international laboratories pending appropriate documentation. Samples ship in October.