RE: Glyoxal?

Yves,
Formaldehyde is dirt cheap and used in large amounts in chemical industry.
$5 is a good price, perhaps what it should cost for a technical grade, $40
is the result of regulation, company overhead and perhaps different purity.
37% is a standard industry concentration
Marek, Houston

>From: Loris Medici <loris.medici@altinyildiz.com.tr>
>Reply-To: alt-photo-process-l@sask.usask.ca
>To: alt-photo-process-l@sask.usask.ca
>Subject: RE: Glyoxal?
>Date: Mon, 16 Jan 2006 17:44:08 +0200
>
>
>Nope, the label in the bottle was clearly saying 37% formaldehyde (no
>point or comma between 3 and 7 - and my close sight is pretty good as
>I'm still young). No mould was formed in the Cyanotype solution A (I
>still have some of it; it's 3 years old and clear...)
>
>Regards,
>Loris.
>
>-----Original Message-----
>From: Yves Gauvreau [mailto:gauvreau-yves@sympatico.ca]
>Sent: 16 Ocak 2006 Pazartesi 17:34
>To: alt-photo-process-l@sask.usask.ca
>Subject: Re: Glyoxal?
>
>
>Loris,
>
>I just look in my catalog and at another source and found the following.
>The reputable chemical source ask $47.50 USD for a liter of Formaldehyde
>37% solution, USP CAS 50-00-0 and the less reputable ask $5.00 for a
>liter of Formaldehyde (37%). I'll let you conclude for yourself but for
>me something is wrong here and this would be about right if the $5.00
>product was for a 3.7% solution which is ten time less concentration.
>Maybe, just maybe you have the $5.00 formalin and this could explain
>your experience.
>
>Regards
>Yves
Received on Mon Jan 16 09:58:58 2006