[Nhcoll-l] off-coloured EtOH

[Callomon,Paul]

If you are diluting 95% ethanol that came in plastic drums from a reputable supplier like Pharmco, then in the absence of specimens the only thing that can cause discoloration is something in your water. That's more chemistry than I learned in school, but my guess would be metals (iron, perhaps, or copper).
If the ethanol was clear before dilution, then unless it was somehow contaminated to start with it's not going to be the source of the issue.
"When you eliminate the impossible, whatever remains - however improbable - must be the truth" (attrib. S. Holmes)


Paul Callomon
Collection Manager, Malacology and General Invertebrates
________________________________
Academy of Natural Sciences of Drexel University, Philadelphia
callomon at ansp.org Tel 215-405-5096 - Fax 215-299-1170
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.yale.edu/pipermail/nhcoll-l/attachments/20200320/debb1861/attachment.html>