Please do some research before attempting to homebrew. Looking at what you just said, I'd say you'd have a great chance of getting an abcess or worse. BA & BB are cosolvents as well as protect against bacteria. The filtration is the main step for purification but the BA & BB are needed. I'm not trying to sound lika an a$$, but hombrewing injectibles is a serious ordeal. It is easy, but if you just rush into it and leave things out you can hurt yourself.