In one of the articles, propane butane mixer is used. It is written that 15% of butane, 84% of propane and 1% of C2 and C5 carbohydrates are used to prepare propane butane. Does anyone have information about C2 and C5 hydrocarbons? Are these hydrocarbons alkane or alkyne or alkene? And does anyone know how to get propane butane tanks with these percentages?