I Chemical Threshold base weight

LSD crystal produced clandestinely can be as much as 95- to 100-percent pure. At this purity—and assuming optimum conditions during dilution and apphcation to paper—1 gram of crystal could produce 20,000 dosage units of LSD. However, analysis of LSD crystal seized in California over the past 3 years revealed an average purity of only 62 percent. 

Compared with methamphetamine, PCP, and other domestically manufactured illicit drugs, few LSD laboratories have been located or seized. Six clandestine LSD synthesis laboratories have been confiscated by DEA since 1981 however, there have been no seizures since 1987.  

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