Delta-9 THC and THCA
Growing cannabis produces mostly THCA, the acid form. Heat converts THCA to delta-9 THC, the intoxicating compound. Freshly harvested flower may contain little delta-9 THC but substantial THCA.
Total THC
Total THC estimates the THC that would be present after full conversion of THCA. It is commonly calculated as delta-9 THC plus THCA multiplied by 0.877, a factor that accounts for the weight lost during conversion.
Why the measure matters
Material can be under a threshold on delta-9 THC alone and over it on total THC. Whether a rule uses one or the other is therefore decisive for some products, especially THCA flower.
A note on changing law
Hemp and marijuana definitions have been amended over time at the federal level and differ by state. Which definition applies depends on the date, the jurisdiction and the product, and is a question for counsel.
Need this analyzed in a matter?
Ted Menadier, MBA provides expert witness services in litigation involving cannabis, marijuana and hemp cultivation, crop loss, crop valuation, business operations, insurance claims, testing, classification and related industry matters. Request a consultation or see information for attorneys.