Characteristics: Bismuth is a brittle, silvery-green metal that has a low melting temperature and high specific gravity. Being both stable and non-toxic, bismuth is often used as a replacement for toxic metals such as antimony, cadmium, lead and mercury.
1 (Minimums vary by location and tank size, and can range from 100-1,500 gallons.) More often, the propane company charges a fee of anywhere from $25-$250 a year but averaging around $75-$130 annually, depending on local rates, the size of the tank and whether it's aboveground or underground.
The point here is that there is an extremely wide range of possible costs for Hydrogen gas! Proponents of Hydrogen always cite the $3 to $5 per CCF, which means $6 to $10 per pound (200 cf) of compressed Hydrogen gas, or $12 to $20 for enough Hydrogen gas to contain the equal energy as one gallon of gasoline.