Do a little research. Butane is very harmful. Butane has benzene, propane propellants, hydrocarbon propellants, propane, cyclopropane dimethylmethane, freon, propylhydride, trimethylene, methylpropane, petroleum.
You need to distill butane before using and vac purge for a few days to remove all those chemicals. They all purge off at different rates and different temps.
Never buy butane by the can. Get N butane by the gallon .
Smoking dirty bho will leave crystallized deposits in your lungs causing pulmonary fibrosis and/ or small cell carcinoma.
That's why you should have bho tested before trying.