<div dir="ltr">Andrew, Our protocol for neutralizing waste formalin, 5-10% decanted into a closed head HP 30 gallon barrel:<div><br></div><div>128 g of sodium metabisulfite per 38 liters of used formalin. Stir and let it sit for a couple of days. Stir again, subsample and test with EM Quant Formaldehyde test kit. If test shows neutral, the neutalized formalin is disposed of in the lab sink. </div>
<div><br></div><div>The sodium metabisulfite should be handled with care when measuring it. Wearing dust mask, safety glasses, and nitrile gloves are required. The stuff is like talcum powder so you need to wear protection against inhaling or getting it in your eyes. MSDS <a href="http://www.sciencelab.com/msds.php?msdsId=9927590">http://www.sciencelab.com/msds.php?msdsId=9927590</a></div>
<div><br></div><div>There are trademark names for sodium bisulfite/metabisulfite (inorganic salt) and various ways it is packaged.</div><div><br></div><div>Best wishes, Lex</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Sun, Apr 13, 2014 at 3:30 PM, Andrew Stewart <span dir="ltr"><<a href="mailto:AndrewS@tepapa.govt.nz" target="_blank">AndrewS@tepapa.govt.nz</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><font size="3" face="Calibri"><span style="font-size:12.0pt">Hi Folks<u></u><u></u></span></font></p>
<p class="MsoNormal"><font size="3" face="Calibri"><span style="font-size:12.0pt"><u></u> <u></u></span></font></p>
<p class="MsoNormal"><font size="3" face="Calibri"><span style="font-size:12.0pt">I am looking for a way to cut the considerable costs to the Museum of commercial disposal of waste formalin. From a quick search of the web, it appears that catalytic oxidation
with UV seems to be the way to go, but I was wondering if anyone has had any experience of doing this, or has a successful system in operation they’d be prepared to share.<u></u><u></u></span></font></p>
<p class="MsoNormal"><font size="3" face="Calibri"><span style="font-size:12.0pt"><u></u> <u></u></span></font></p>
<p class="MsoNormal"><font size="3" face="Calibri"><span style="font-size:12.0pt">Thanks for your help!<u></u><u></u></span></font></p>
<p class="MsoNormal"><font size="3" face="Calibri"><span style="font-size:12.0pt"><u></u> <u></u></span></font></p>
<p class="MsoNormal"><font size="3" face="Calibri"><span style="font-size:12.0pt">Andrew<u></u><u></u></span></font></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt"><u></u> <u></u></span></font></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt">Andrew Stewart<u></u><u></u></span></font></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt">Collection Manager<u></u><u></u></span></font></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt">Museum of New Zealand<u></u><u></u></span></font></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt">DDI (04) 381-7314<u></u><u></u></span></font></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<u></u><u></u></span></font></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt">></span></font><font size="4"><span style="font-size:14.0pt">></span></font><<font size="4"><span style="font-size:14.0pt"><</span></font><font size="5"><span style="font-size:18.0pt"><</span></font><font size="5"><span style="font-size:16.0pt">))</span></font>O<font size="1"><span style="font-size:9.0pt">></span></font><u></u><u></u></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt"><u></u> <u></u></span></font></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt"><u></u> <u></u></span></font></p>
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