Hi Mark, You may well be right. Here is a less technical description that clearly states it is not cyanide. http://www.ca-plus.com/faq.html At 07:09 PM 4/27/2006 -0700, you wrote: >Hi, Don. > >I looked at the link you provided, and while I'm not altogether certain, >I think it's saying that the formaldehyde is a byproduct of hydrolysis >resulting from degradation of the polymer after it's in situ for some >period of days, not during curing. To wit: > >"Hydrolytic degradation of polymers (e.g., cyanoacrylate polymers) to >smaller oligomers involves a hydrolysis reaction. Release of >formaldehyde as a by-product of cyanoacrylate hydrolytic degradation and >the resultant cytotoxic or histotoxic effects have been reported and >documented in research and medical journals (Trott, 1997)." > > and also > >"We recommend that you report results for these by-products of material >decomposition present in saline extract at 50°C for a period of 15 days >via Gas and/or Liquid Chromatography. The analytical procedure should be >sensitive to ppm level." > >I've looked at several Material Safety Data Sheets, and they all warn >against irritation of mucous membranes from fumes, but so far I've not >found any that talk about toxicity of the fumes. Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. Non calor sed umor est qui nobis incommodat mailto:pianotuna at yahoo.com http://us.geocities.com/drpt1948/ 3004 Grant Rd. REGINA, SK, S4S 5G7 306-539-0716 or 1-888-29t-uner
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