Are cannabis distillate carts safe?

Carts from licensed stores that carry a state test report have lower risk than carts from the illicit market. No distillate cart is risk-free. Risk sits in four places: the oil, the additives, the hardware, and the heat.

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What is in a distillate cart

Distillate is THC oil made by extraction and short-path distillation. THC content runs from 70% to 90%. The process strips terpenes and most other cannabinoids. Producers add terpenes back for flavor and to thin the oil. Additives can include propylene glycol, polyethylene glycol, MCT oil, and botanical terpenes. Labels do not always list additives.

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State testing rules

States with legal markets require lab tests before sale. Panels cover potency, pesticides, heavy metals (lead, cadmium, arsenic, mercury), residual solvents, microbials, and mycotoxins. Rules differ by state. California requires a full panel on each batch. Some states test fewer compounds. A cart with no certificate of analysis (COA) has no test data behind it.

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Vitamin E acetate and EVALI

CDC counted 2,807 hospital cases and 68 deaths from EVALI as of Feb 18, 2020. Vitamin E acetate appeared in 48 of 51 lung fluid samples from patients in 16 states. CDC named it a chemical of concern and tied most cases to THC products from informal sources. Vitamin E acetate is a thickener. Legal distillate does not need it. Carts bought from unlicensed sellers remain the main risk path.

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Hardware and heat

Cartridges hold a metal coil and wick inside a glass or plastic tube. Coils are nichrome, kanthal, or ceramic. Metal parts can leach when the coil runs hot. High voltage burns the wick and forms formaldehyde and acrolein. Lower voltage and shorter puffs cut the output. Ceramic coils run cooler than metal coils in most tests. Few cartridge brands publish material data.

What is unknown

Long-term lung effects of inhaled distillate are not known. Data on heated additives is limited. No standard exists for cartridge materials. Rules vary by state and change each year.

Risk reduction

  • Buy from a licensed store and ask for the batch COA.
  • Match the COA batch number to the package.
  • Check the label for MCT oil and vitamin E acetate.
  • Run the battery at or below 3.3 volts.
  • Stop use if the cart tastes burnt.
  • Do not buy carts from social media sellers.