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#1
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Formaldehyde expiration
I have a gallon of Paracide ( Formaldehyde 37% solution from Argent
Lab) left from the early 90s. Has an expiration date 1994. The stuff is still crystal clear, no whitish formation on bottom. Stored in garage never below 40F. Can I still use the stuff for Koi pond ? Its still Formaldehyde ain't it ? |
#2
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Formaldehyde expiration
I'm not sure why there's an expiration date. I once bought a
gallon of it from aqua-something in Mississippi and it was already expired. I complained and the guy sent out another gallon. The second was set to expire in less than a year. Hm. Anyway, according to him, they "do not expire". When I asked, "so why does it have an expiration date?", he couldn't answer. Anyway, I still have these two gallons, which I keep under the sink, double-bagged. I only use about 30 ml of it at a time, and only because it SEEMS to neutralize whatever my Texas toads release in the water when they orgy, something which many of my fish don't like. Over the years, I now move the toads out as soon as they appear (after a rain of 1" plus), so in recent times, I have little use for the stuff, and 30ml is maybe a tablespoon or two (for 3000 gl of water). Placebo? How would the fish know? (ahah) But I don't have the 20+ toad-fests anymore, which can be almost deafening. But it's never hurt so I do it just in case (the 30 ml). I have Formalin F, I think it is. Formaldehyde (37% sounds about right) and maybe alcohol (1999 & 2000 expires). If it's good enough to embalm for eternity ... but ask a chemist, or maybe a mortician, or dispose of according to the label and get yourself some newer stuff. steve (8 Jul 2004 01:49:42 -0700): I have a gallon of Paracide ( Formaldehyde 37% solution from Argent Lab) left from the early 90s. Has an expiration date 1994. The stuff is still crystal clear, no whitish formation on bottom. Stored in garage never below 40F. -- '`'`'`'`'`'`'`'`'`'`'`'`'`'`'`'`'`''`'`'`'`'`'`'`' `'`'`''`'`'`'`'`'`'`' SLOTHEAD |
#3
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Formaldehyde expiration
I wouldnt. Ingrid
(steve) wrote: I have a gallon of Paracide ( Formaldehyde 37% solution from Argent Lab) left from the early 90s. Has an expiration date 1994. The stuff is still crystal clear, no whitish formation on bottom. Stored in garage never below 40F. Can I still use the stuff for Koi pond ? Its still Formaldehyde ain't it ? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List Manager: Puregold Goldfish List http://puregold.aquaria.net/ www.drsolo.com Solve the problem, dont waste energy finding who's to blame ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Unfortunately, I receive no money, gifts, discounts or other compensation for all the damn work I do, nor for any of the endorsements or recommendations I make. |
#4
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Formaldehyde expiration
I wouldnt. Ingrid
(steve) wrote: I have a gallon of Paracide ( Formaldehyde 37% solution from Argent Lab) left from the early 90s. Has an expiration date 1994. The stuff is still crystal clear, no whitish formation on bottom. Stored in garage never below 40F. Can I still use the stuff for Koi pond ? Its still Formaldehyde ain't it ? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List Manager: Puregold Goldfish List http://puregold.aquaria.net/ www.drsolo.com Solve the problem, dont waste energy finding who's to blame ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Unfortunately, I receive no money, gifts, discounts or other compensation for all the damn work I do, nor for any of the endorsements or recommendations I make. |
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