<html> <body> At 05:18 PM 10/4/2005 -0700, Mark Potter wrote: <blockquote type=cite class=cite cite="">David Skolnik <davidskolnik@optonline.net> wrote: <dl> <dd>Just to clarify, UFO is Satellite City's odorless formulation, i.e, same <dd>brand. There are other manufacturers, such as Loctite, who also make an <dd>odorless version. (408 Prism Instant Adhesive Low Odor). <dd>David - <dd>A quick query... does the "odorless" feature of these CA glues necessarily mean that the toxicity is lower?  Better safe than sorry...  <dd>Mark Potter </blockquote> </dl> Mark - The short answer is - NO.  For the longer version, I'll beg the indulgence of any dual subscribers (pianotech & CAUT) and copy here my earlier post on the matter from the CAUT list - <blockquote type=cite class=cite cite="">Date: Tue, 04 Oct 2005 18:59:56 -0400 From: David Skolnik <davidskolnik@optonline.net> Subject: Re: [CAUT] Anyone using UFO CA glue? Ken & all - As explained to me by two technical people from Loctite, which manufactures a wide variety of CA and other adhesives, their Odorless formulation (408 Prism brand Instant Adhesive) accomplishes its odorlessness through a fornulation that has a heavier molecular weight than the odor-ful versions.  This weight keeps any fumes from rising to nose level.  This is measured as Vapor Pressure.  The exposure limit for this formulation is set at the same level as the regular product, which is 0.2ppm TWA.   The odor is perceptible at 1-2ppm and irritation occurs at 3-4ppm.  Which means, if you can smell it, you're already over the threshold limit.  We discussed the difference between allergic response and irritant response, the later being the issue in most cases.  Allergic response is found more in skin contact than respiration. While the MSDS advises use of approved respirator, the document's author indicated that such dependance is strongly discouraged for a number of reasons.  OSHA regulations require that: - Any respirator, apart from its appropriateness, must be properly fitted, (sorry, no beards allowed :() - Worker must pass physical to confirm ability to tolerate respiratory strain associated with pulling air through filter device - Ambient atmospheric moisture will cause fumes to polymerize on the mask's surface, rapidly restricting the available air flow Bottom line...respirators are not a desirable solution to CA fumes. Only truly advisable method is to generate air exchange.  Simple air circulation, as with a fan is NOT advised, since it will distribute the fumes, though, if the space is large enough, and the elapsed time is not prolonged, a fan might work to displace the fumes from the immediate area of deployment. As to the post from Dorothy Bell, I can't address the chemistry, per se, however, the issue of respiratory irritation and the ensuing reactions seems to present itself at lower dosage than would be required to cause any symptoms of cyanide poisoning.  The MSDS indicates a concern for the material as an irritant, not as a toxin. Bottom bottom line - Fumeless is better, fresh air is best. Last bottom line - MSDS for Accelerator indicates central nervous system irritant.  The residue left after solvent dissolves is, in a word, nasty.  I've been way to cavalier in my use of this stuff. David Skolnik Of course, I could be wrong</blockquote> I hope that helps, Mark. D. Skolnik </body> </html>