Pentane 55 Gallon DrumBrand of chemicals may differ from product image. Pentane is a highly non polar, light hydrocarbon solvent, that acutely dissolves THC instead of plant matter. With a boiling point of 36 degrees celsius, this solvent might be a bit heavier than butane but still functions well for most applications. It can be found as an impurity in butane, but residual pentane is not a major concern as long as the oil is purged thoroughly, with lots of surface area