Tom Buck on fri 28 aug 98
Well, Andrea G, I hope you exercise extreme caution in handling this
material when using it in your fibrearts activities. It is highly toxic,
and a strong oxidizer (ie, starts fires). Use rubber gloves, use only
small amounts at a time, and store the original container so it cannot
fall and spill the compound.
Pot Permang is KMnO4, and breaks down on heating (240 C) to K2O
and MnO2 and releases O2 as well. It really has no place in a pottery
studio since it is costly, soluble in water, and dangerous to handle. One
can achieve the same amount of K2O and MnO2 from other safe sources. And
no, it will not usually yield a purple colour in alkaline- or alkaline
earth based glazes although MnO2 will give a purple colour to high-lead
glazes at earthenware temperatures (lead-based glazes on pots that could
be used for food are subject to rigorous testing in USA/Canada).
Tom Buck ) tel: 905-389-2339
& snailmail: 373 East 43rd St. Hamilton ON L8T 3E1 Canada
(westend Lake Ontario, province of Ontario, Canada).
Edouard Bastarache on sat 29 aug 98
Hello Andrea G.,
Potassium permaganate is a human poison by ingestion.Human systemic effects
by ingestion are:
-dyspnea,
-nausea,
-other gastro-intestinal effects.
A strong irritant due to its oxidizing properties.
It is used as a topical antibacterial agent, a chemical reagent.
Experimentally:
-a poison by ingestion and intraveinous routes,
-moderately toxic by subcutaneous route,
-reproductive effects,
-mutagenic data.
It is flammable by chemical reaction.A powerful oxidizer.
A dangerous explosion hazard;handle with care.
Explosions may occur in contact with organic or readily oxidizable
materials,
either when dry or in solution.
Dangerous: keep away from combustible materials.
It reacts( explosion,ignition on contact, violent reaction)
with quite many chemicals and the list of these
is too long to be mentioned in this message.
When heated to decomposition it emits toxic fumes of K20 (Potassium oxide)
Later,
Edouard Bastarache M.D. (Occupational & Environmental Medicine)
edouardb@sorel-tracy.qc.ca
http://www.sorel-tracy.qc.ca/~edouardb/
----------
> De : Tom Buck
> A : CLAYART@LSV.UKY.EDU
> Objet : Re: Potassium permangante
> Date : 28 ao{t, 1998 10:07
>
> ----------------------------Original message----------------------------
> Well, Andrea G, I hope you exercise extreme caution in handling this
> material when using it in your fibrearts activities. It is highly toxic,
> and a strong oxidizer (ie, starts fires). Use rubber gloves, use only
> small amounts at a time, and store the original container so it cannot
> fall and spill the compound.
> Pot Permang is KMnO4, and breaks down on heating (240 C) to K2O
> and MnO2 and releases O2 as well. It really has no place in a pottery
> studio since it is costly, soluble in water, and dangerous to handle. One
> can achieve the same amount of K2O and MnO2 from other safe sources. And
> no, it will not usually yield a purple colour in alkaline- or alkaline
> earth based glazes although MnO2 will give a purple colour to high-lead
> glazes at earthenware temperatures (lead-based glazes on pots that could
> be used for food are subject to rigorous testing in USA/Canada).
>
> Tom Buck ) tel: 905-389-2339
> & snailmail: 373 East 43rd St. Hamilton ON L8T 3E1 Canada
> (westend Lake Ontario, province of Ontario, Canada).
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