Puretane Purifed N-Butane 

Puretane’s premium butane is Made in the USA, and also known as N-Butane. It is triple refined and then filtered 9 times for maximum purity – 99.999%. Puretane N- Butane Food grade is triple refined through fractional distillation. For Herbal Extractions you should only use the most PURE Butane available