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From: Harry J. Elston <helston**At_Symbol_Here**MIDWESTCHEMSAFETY.COM>
Subject: Re: [DCHAS-L] Chemical Inventory
Date: Mon, 1 Aug 2016 20:15:15 -0500
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: CAJ2hcfcrxU6=DyL8xD+it8c=7YQgzhrtWBgp=1MTyAhFFCCS1Q**At_Symbol_Here**mail.gmail.com
In-Reply-To <7C44CD49-9098-4BAE-98E1-1A93AEB7EADC**At_Symbol_Here**keene.edu>


One of Elston's rules for chemical inventory management: If you haven't used it for 3 years, you don't need it. Some exceptions apply, but they are rare.

There are a few other rules, such as "expiration dates probably aren't" for most purposes. I think Ralph hit a good point - you're taking up valuable lab space.

Harry

On Mon, Aug 1, 2016 at 7:22 PM, Stuart, Ralph <Ralph.Stuart**At_Symbol_Here**keene.edu> wrote:
> >Regardless of shelf life, a practical consideration is whether or not a researcher would use the old chemical if fresh was available.

This also plays into the cost of storing chemicals; lab space is much more valuable when it is used to use chemicals than it is to store them. And probably the biggest cost associated with a library of chemicals in storage is paying for the human resources of a librarian to keep track of what is available in storage and what needs to be restocked...

- Ralph

Ralph Stuart, CIH, CCHO
Chemical Hygiene Officer
Keene State College

ralph.stuart**At_Symbol_Here**keene.edu



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