Hi RCtriplefresh,
As a dry product I would expect virtually no leaching over the period of the expiration date on the bottle and some years after with normal storage. Dose makes the poison. A few mcg of botuilism toxin is dangerous. The estimate LD50 dose of marihuana is 1500 pounds consumed in 15 minutes. Imagine what happens if they can transport 1500 pounds of any vegetable matter into your stomach. It would be very lethal. Clearly it is considered safe by the FDA. However, call the company and let them know your concerns. If enough people do they might change next time they have to order more bottles. Phthalates leach into liquids.