5 to 15%.
Low range. 10mg ÷ .05 = 200mg
Mid range. 10 ÷ .10 = 100mg
High range 10mg ÷ .15mg/mg = 66mg
so quite the range for such a potent compound. 66-200mg...
All that said, 10mg of freebase is actually approaching a strong dose. I would consider 5mg to be a "moderate" dose. Due to the pretty large variation, i would start slow. Safe travels.
Sources:
5-methoxy-N,N-dimethyltryptamine (hereinafter referred to as 5-MeO-DMT) is a psychedelic substance found in the secretion from the parotoid glands of the Bufo alvarius toad. Inhalation of vapor from toad secretion containing 5-MeO-DMT has become ...
pmc.ncbi.nlm.nih.gov
"Since a toad yields about 0.25–0.50 g of dried secretion from a “milking session,” with a 5-MeO-DMT content of up to 15% (Erspamer et al.
1967), a single toad may generate 75 mg of 5-MeO-DMT in its secretion that, when smoked, is already psychoactive in humans at doses as low as 3–5 mg"
The most abundant representative of 5-hydroxyindolealkylamines is, as in numerous other toads, bufotenine (up to 3 mg per g dry skin), the most abundant representative of 5-methoxyindolealkylamines,
O-methylbufotenine. In parotoid and coxal glands as much as 5–15 per cent of the dry weight is made up by this compound