Comment · Wed, July 15, 2015 · Ceretropic
THT is back
What they were answering
AddMoreWeight · 3 points
He showed me in person, so the files are stored at their HQ. Maybe he'd be willing to share his thoughts on their return when he sees this.
u/MisterYouAreSoDumb · Ceretropic
That was 7,8-DHF, which did not match Sigma Aldrich's reference standard. We are rerunning all those testing now on our in-house HPLC to be 100% sure. Colin said the NMR was inconclusive, and that the HPLC only had a 92% match to Sigma's standard.
It pisses me off so much that I have had multiple products for months, but cannot release them due to waiting on purity test results. Colin is taking months now, and doing things in-house is the only way to control it. I just found some 7,8-DHF HPLC methods, and have all the solvents needed to run it. I also directly bought a reference standard from Sigma Aldrich. I am going to have my chemist try and run a test now. $70/gram is highway robbery for 7,8-DHF. Let me work on this.