THCA powder is a completely melted product that can be applied with a dab rig, a dab pen or a dry vaporizer. Be sure to control your temperature with it; we recommend starting with touches at a low temperature (around 315°) so that the THCA converts to THC. Consuming the powder in this way alone can cause a very euphoric experience. To obtain a real potency value, you must consider both THCA and THC, but with a correction factor for THCA before adding THC.
In fact, research on THCA has shown that THCA doesn't seem to bind much to either of the two main cannabinoid receptors.