>>13162598>Food Grade HexaneMany of the well known hydrocarbons that people assume are hazardous toxins turn out to be completely harmless when you read the MSDS.
If butane weren't an explosive gas then you could live in an atmosphere that was a substantial percentage butane. as it is butane tends to explode when its more than about 1% of atmosphere, but other than that butane has been found to be non carcinogenic and otherwise unharmful even after decades of extensive testing.