No matter how expensive 99.999% BN is, why wouldn't they just buy this very common chemical, and get on with what they do best, make the EESU or at least the BT?
Because what they do best is not completely about making the EESU. It is about making the EESU for $100/kWh. You can get the purity of BT needed on films by using MBE but imagine how much that would cost.
“Historically, the claim of consensus has been the first refuge of scoundrels; it is a way to avoid debate by claiming that the matter is already settled.”- Michael Crichton

