[Histonet] Re: alternates to absolute ethanol

Robert Richmond rsrichmond <@t> gmail.com
Fri Dec 11 13:28:39 CST 2009

Without the methanol, is this a legal denaturing formula in the USA?
With the methanol, it's called S3D denatured alcohol.

Bob Richmond

On Fri, Dec 11, 2009 at 2:17 PM, Akemi Allison <akemiat3377 <@t> yahoo.com> wrote:
> American Mastertech has a Reagent Grade Ethyl Alcohol which is formulated
> with 95%, 200 proof ethyl alcohol and denatured with 5% isopropyl alcohol,
> NO Methanol!  Cat #ALREACS for 4 Gal.  It costs a little more, but well
> worth it! If you read the fine print on the contents of most of your histo
> and reagent grade alcohols, it is mostly denatured with Methanol.
> We would use this American Mastertech Reagent  grade for our H&E, IHC and
> Special Stains, stain line.  We also made ALL of our products with this
> grade while I was at Biocare.
> Akemi Allison BS, HT (ASCP) HTL
> Director
> Phoenix Lab Consulting
> Tele: 408.335.9994
> E-Mail: akemiat3377 <@t> yahoo.com
> On Dec 11, 2009, at 11:39 AM, Robert Richmond wrote:
> The commonly used (in medical histology anyway) alcohol is 90%
> ethanol, 5% methanol, and 5% isopropanol. Since it's denatured, you
> don't have the nuisance and taxes of handling beverage-quality
> ethanol. The common name for this mix is "reagent alcohol". Other
> denaturants such as methylisobutylketone (MIBK) (smells bad) and
> acetone (removes eosin) should be avoided.
> Bob Richmond
> Samurai Pathologist
> Knoxville TN
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