high purity gas pricing (specifically n-Butane)

[Bond28]

Dear all,

I am trying to figure out market prices for high purity n-Butane prices as a part of potential forward integration of my company. We are studying oportunities of selling high purity n-Butane as aerosol propellant to the cosmetics industry.

Does anybody know current price levels or where to find current high purity n-Butane price levels? And does anybody by any chance know what the biggest players in the American market are?

Any hint will be greatly appreciated.

Sincerly,
Patrick