Potassium permanganate % ?

[Hans J]

Hi all ,

who knows which concentration Potassium permanganate ( KMnO4 ) must be used ?

I will use is for desinfection of seeds , watering seedlings and similar ....
By searching here I have found not so precise information ( only after colors ) ....I would prefer it in % !

Potassium permanganate it also used in medical purpose ,also for Aquaristic and more ....

I would be glad if anybody can help

Thank you in advance
Hans

[ashley]

I'd suggest something in the range 0.1-1% (1-10 g/L) Hans, maybe less if you plan to water seedlings though.

[Hans J]

Ashley ,

many thanks for your information 

It seems not so many members use this product ....
Are the expierences not so well ?

[johnw]

Potassium permanganate it also used in medical purpose ,also for Aquaristic and more ....

Did we not use this as a synergist to produce oxygen in the grade 7 school lab?

johnw

[Diane Whitehead]

It seems not so many members use this product ....
Are the expierences not so well ?

I never had problems with it.  I just added enough crystals to colour the water.

Now I use hydrogen peroxide.  It is already mixed, and can be bought everywhere.
It is good for using on people as well, and doesn't  turn them purple.  I just use
it occasionally, though, for oncocyclus iris seeds and a few others.

[Lesley Cox]

I sometimes use it at the rate of 1/2 a tsp (sorry, not a percentage) in a 10 litre can of water, watered on to bring worms and others to the top of my troughs, so they can be removed.

[Gerdk]

I sometimes use it at the rate of 1/2 a tsp (sorry, not a percentage) in a 10 litre can of water, watered on to bring worms and others to the top of my troughs, so they can be removed.

Hans,
That's pretty much like a percentage - take a teaspoon - fill it fifty-fifty with the crystals. Then weigh them and you are able to figure out the %!
Not really scientific - but it works!    

Gerd

[Hans J]

Thank you all for your informations !

Gerd :....but Lesley use it for bring out worms .....

Diane : I use also H2O2 for desinfection of seeds  ....but KMnO4 seems to have more possiblities :
desinfection for seeds , push up the germinate rate ...and a good growing of roots.
I think H2O2 is only for desinfection

I hope Janis will also maybe answer to this topic -he wrote he use KMnO4 also for sowing....

Hans

[Rodger Whitlock]

I sometimes use it at the rate of 1/2 a tsp (sorry, not a percentage) in a 10 litre can of water, watered on to bring worms and others to the top of my troughs, so they can be removed.

Most granular solids have a density around 2. Hence, Lesley's half teaspoon is abt 5 grams. Her 10 litres is 10 kg. Hence the concentration she gets is about 0.05% by weight.

Approximate, yes, but close enough for government work (as they say).