If you are looking for Material Safety Data Sheet information on Whip-It! butane or some other refined butane, the first place to start is either with the distributor or manufacturer. All reputable businesses that manufacture or distribute the gas, whether as a butane refill or in a lighter or torch, should be able to provide chemical and safety data on the product.
There are dozens of companies that manufacture and distribute refined butane, but the top ranked brands — both in terms of reliability of the product and availability of safety data, are as follows (but in no particular order):