Delta-10

Delta-10 is a THC isomer. The number is the position of the double bond in the ring, the same counting used for delta-8 and delta-9. Move that bond and the molecule is a different isomer with the same carbon count. Delta-9 is the form plants make in meaningful amounts and the one older literature means by THC. Delta-8 and delta-10 are the less common positions. Delta-10 showed up in product names much later than delta-9, mostly where hemp extracts were being separated into isomers. Delta-9 lives on the THC page. Delta-8 has its own page. A label that says delta-10 is this isomer.