My personal interpretation is that that web page is a bunch of horse S$%t, designed to slander certain UGLs and scare home brewers.
Below I have a link to pfizer's pdf file for test cyp. Please note that they use
20%BB and 1% BA in their formula. If that isn't enough then how about the fact that the vials BB and BA come in have rubber stoppers and after years of exposure to 100% BB and BA there is no noticable deteriation of the rubber.
I don't go through any UGLs personally and am not affiliated with any, so i have no personal interest in disputing the claims of this web page. I have seen the web page before and for my own safety decided to see what the drug companies use, knowing that they must pass FDA testing.
Link to Pfizer's test depo:
http://www.pfizer.com/pfizer/downloa...stosterone.pdf