Potassium permanganate + formaldehyde

[Antonio Ruiz]

It seems that this mixture is used to "disinfectant" some closed places.

The first thing that comes to me is that it must be a violent reaction as
permanganate is a strong oxidiser and formaldehyde must be oxidised.

Someone knows this kind of application for this mixture?

I would appreciate some information about composition of mixture, field of
application, etc.

Thanks for your help.

[sizzle]

On Wed, 26 Jan 2000 07:48:11 GMT, "Antonio Ruiz" <anr...@wanadoo.es>
wrote:

Ironically, KMnO4 helps precipitate =out= manganese and iron in
municipal water, at least, so I'm told. I am not sure of the role of
HCHO, though. I always thought the permanganate worked in conjunction
with hypochlorites, such as HTH (CaOCl) or NaOCl for disinfection and
demineralization.

Shows what a layman I am! :-)

- John

[Milton R. Beychok]

Antonio:

Potassium permanganate can be and often is used to oxidize organic compounds
in waste water ... compounds such as phenols, cyanides, and formaldehyde. As
for using it to disinfect, I don't know of such application.

Milton Beychok
(Visit me at www.air-dispersion.com)
============================================

[Antonio Ruiz]

Well, in water treatment, potassium permanganate is used as oxidiser to
prevent from disagreeable smells caused by sulphurs. But to remove iron and
other metals, the usual method is to precipitate with an alkali substance
(NaOH or Ca(OH)2). I know sodium hypoclorite is used as disinfectant and
formaldehyde as preserver from bacterial contamination in some applications,
but I've never heard from a mixture KMnO4 + Formaldehyde.

sizzle <gyr...@gyrogearloose.com> escribió en el mensaje de noticias
5mjt8sona4siqn1hr...@4ax.com...

> On Wed, 26 Jan 2000 07:48:11 GMT, "Antonio Ruiz" <anr...@wanadoo.es>

> wrote:
>
> >It seems that this mixture is used to "disinfectant" some closed places.
> >
> >The first thing that comes to me is that it must be a violent reaction as
> >permanganate is a strong oxidiser and formaldehyde must be oxidised.
> >
> >Someone knows this kind of application for this mixture?
> >
> >I would appreciate some information about composition of mixture, field
of
> >application, etc.
> >
> >Thanks for your help.
>
>

[Bandito Stipe]

KMnO4 used to purify water???? that is a little scarey. How do they make
sure it's out of the water by the end of the process?? I wouldn't want it
getting acidified by my stomach in the end. that would be unpleasant
Antonio Ruiz <anr...@wanadoo.es> wrote in message
news:%Exj4.3353$N61....@m2newsread.uni2.es...

[cf125]

Is potassium permanganate not used at the dentest's for you to rinse
your mouth out? I think it is.
Craig Ferguson

Bill Nelson wrote:
>
> In sci.chem Bandito Stipe <dave...@home.com> wrote:
>
> : KMnO4 used to purify water???? that is a little scarey. How do they make

> : sure it's out of the water by the end of the process?? I wouldn't want it
> : getting acidified by my stomach in the end. that would be unpleasant
>

> Regardless of how scarey it is to you - potassium permanganate is used
> in iron filters for water systems.
>
> --
> Bill Nelson (bi...@peak.org)

[mafioso]

dear friend
potassium permenganate :KMno4 is for sure as you stated a
strong oxydiser but i doubt it might be used as some have
said in process of purifying water because of the violet
color of the permenganate MnO4- it would be
recognisable .Now for sodium hypochlorate it is know that
it is in the process of disinfection as well as
whitening ,it is also called" eau de javel".
as for the formaldehyde: CH3-CO-H i could not find any
relation with the potassium permenganate since they are
both oxydiseres.

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[Milton R. Beychok]

Mafioso:

As I said in my response of January 26th to the original question in this
thread:

"Potassium permanganate can be and often is used to oxidize organic compounds
in waste water ... compounds such as phenols, cyanides, and formaldehyde."

The operative words are that potassium permanganate is quite often used to
oxidize H2S and/or organic compunds in *waste water* ... not drinking water.
How this thread got off track into worrying about using it for treating drinking
water, I don't know.

Milton Beychok
(Visit me at www.air-dispersion.com)
==================================

[Dr. Henry]

Funny thing, thee are uses for permanganate in
process water systems.

--

Dr. Henry Boyter, Jr. Ph.D. Chemist

The opinions of Dr. Boyter are provided for informational
purposes only and should not be used as advice. No
warranty or expression of professionalism is implied.

***************

Milton R. Beychok <mbey...@home.com> wrote in message
news:389BC1C5...@home.com...

[Barb]

Yes, KMnO4 is used to treat well water that has a high iron content. We
had such a well when we lived south of Akron (pH of 3.5, iron ~50 ppm).
We first adjusted to pH (helps to prevent the copper pipes from pitting)
then the water went through a resin bed charged with KMnO4. No - there
wasn't a pink color - - though sometimes we would get a few specks of
MnO if we were pumping pretty hard. After the permanganate filter, we
ran it through a softner (which helped trap any MnO2 particles).

Barb

In article <389BC1C5...@home.com>, "Milton R. Beychok"

<mbey...@home.com> wrote:

:Mafioso:

:

[Fred Kasner]

I hope to God I never get into your dentist's chair. They use a scented
mouthwash here in the states. They don't even use KMnO4 to cure trench
mouth.
FK

[Fred Kasner]

I suspect you are confused by the color of a common crude water
disinfectant, iodine. Not much used in large scale water supplies but
quite useful in the "wild" where you can't trust a natural water supply.
(A lot of those wonderful bubbling streams are nasty stuff to drink
from.)
FK

[cf125]

No, I checked, it is a very low concentration( only enough to turn the
water pale pink) but it is KMnO4. I think it also contains other
chemicals as well but am not sure, I'll ask next time i'm at the
dentists.
CF

[cf125]

ps you spit it out,not swallow it, perhaps it is to remove trace
ammounts of mercury?
CF

[Jeff Brandenburg]

In article <389F41A6...@york.ac.uk>, cf125 <cf...@york.ac.uk> wrote:
>No, I checked, it is a very low concentration( only enough to turn the
>water pale pink) but it is KMnO4. I think it also contains other
>chemicals as well but am not sure, I'll ask next time i'm at the
>dentists.

KMnO4 is an absurdly powerful colorant. By the time you've diluted it
enough to be "pale pink," I would think it would have very little effect
on anything at all. Sort of like rinsing with 0.01% H2O2...
--
-jeffB (Jeff Brandenburg, Durham, NC)

[Fred Kasner]

I doubt that you could oxidize metallic Hg with KMnO4. Besides you are
swallowing all the time. Unless you are very devout Moslem and it is
daytime Ramadan we all swallow our saliva.
KMnO4 is a real hell on soft tissue. Although I was told that
prostitutes douched with it and lemon juice in Panama during WWII.
FK

[Fred Kasner]

You have missed the chemical point. KMnO4 is a much greater oxidant than
H2O2. The effect of concentration is merely how much stuff it can
oxidize. Making it very dilute doesn't make it inherently less powerful
than H2O2 in acid solution.
FK