[Nhcoll-l] 70% ETOH in volume?

[Bentley, Andrew Charles]

Tonya

This is very US centric but I am unaware of any vendor that sells 70% ethanol in large quantities like the 55 gallon drums of 95% ethanol we currently purchase.  Most are molecular grade solutions that are very expensive ($400-1000 for 5 gallons).  I must admit that I have not looked extensively but I would also be leery of pH, additives etc. of any solution that is purchased already mixed.  Solutions like this would inevitably separate if left in storage for any length of time also and would still need to be thoroughly mixed before using I would suspect.

Andy
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Andy Bentley
Ichthyology Collection Manager
University of Kansas
Biodiversity Institute
Dyche Hall
1345 Jayhawk Boulevard<x-apple-data-detectors://9/>
Lawrence, KS, 66045-7561<x-apple-data-detectors://9/>
USA<x-apple-data-detectors://9/>

Tel: (785) 864-3863<tel:%28785%29%20864-3863>
Fax: (785) 864-5335<tel:%28785%29%20864-5335>
Email: abentley at ku.edu<mailto:abentley at ku.edu>
ORCID: https://orcid.org/0000-0002-3093-1258
http://ichthyology.biodiversity.ku.edu<http://ichthyology.biodiversity.ku.edu/>
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From: Nhcoll-l <nhcoll-l-bounces at mailman.yale.edu> On Behalf Of Haff, Tonya (NCMI, Crace)
Sent: Tuesday, September 20, 2022 10:01 PM
To: nhcoll-l at mailman.yale.edu
Subject: [Nhcoll-l] 70% ETOH in volume?

Hello everyone,

Following on our conversation about mixing 70% EtOH, I am wondering if anyone purchases pre-mixed 70% instead of diluting it in-house? We are going through a lot of ethanol right now, and it would ease our work flow if we could cut the in-house mixing stage and just decant 70% straight out of a pre-mixed drum... but I suspect this may come at a cost (and perhaps not only financia?). I would love to hear your thoughts and perspectives on this.

Thanks!

Tonya

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Dr. Tonya M. Haff
Collection Manager
Australian National Wildlife Collection
CSIRO
+61(0)419569109
https://www.csiro.au/en/about/facilities-collections/collections/anwc<https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.csiro.au%2Fen%2Fabout%2Ffacilities-collections%2Fcollections%2Fanwc&data=05%7C01%7Cabentley%40ku.edu%7Cf18bb41129a74024726a08da9b7d84ad%7C3c176536afe643f5b96636feabbe3c1a%7C0%7C0%7C637993260660009326%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=5ZfCZRNpMVTFw2wWOZxkssMK0M%2BVlS6o0vBbC6ufQ3I%3D&reserved=0>

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