How about recrystallize using acetone? Jürgen > On Jul 10, 2025, at 12:47 PM, Patrick Loll <pjl...@gmail.com> wrote: > > Can anyone recommend a brand/item number for a nice clean imidazole (low > OD280) that doesn’t break the bank? Our last batch from Sigma-Aldrich was > pretty gross, and absorbed pretty strongly at 280 nm. Ideally, we’re looking > for a product easily available in the US (where we’ll likely pay tariffs, > sigh). > > Thanks, as always! > > Pat > > --------------------------------------------------------------------------------------- > Patrick J. Loll, Ph. D. (he, him, his) > Professor of Biochemistry & Molecular Biology > Drexel University College of Medicine > Room 10-102 New College Building > 245 N. 15th St., Mailstop 497 > Philadelphia, PA 19102 USA > > (215) 762-7706 > pjl...@gmail.com > pj...@drexel.edu > > ######################################################################## > > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB&A=1 > > This message was issued to members of www.jiscmail.ac.uk/CCP4BB, a mailing > list hosted by www.jiscmail.ac.uk, terms & conditions are available at > https://www.jiscmail.ac.uk/policyandsecurity/
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