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Thread: Permethrin dilution ratio?

  1. #1
    Join Date
    Dec 2012
    Location
    Dublin
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    62

    Default Permethrin dilution ratio?

    Hey guys,
    I just got 60ml x 12% Permethrin from Military Mart. I want to use 1/2 to treat a single net, anf the rest to treat some clothing. How much water do I need to add to dilute it?
    Thanks!

  2. #2
    Join Date
    Aug 2004
    Location
    Isle of Wight
    Posts
    2,108

    Default

    The Lifesystems Permethrin EX4 Spray for clothing is 0.49%

    https://www.lifesystems.co.uk/produc...mosquito-spray

  3. #3

    Default

    I would not want to give you direct numbers, since it is a long while since I did A-level chemistry and I am conscious that by advising I would be responsible if you got into problems...So, when I want to take my 11%w/w net treatment and turn it into 0.5% clothing treatment, I go on-line and search on google for "Dilution calculation" and get a whole load of sites that do nothing but explain how to turn A volume of B concentration into C volume of D concentration.

    https://www.google.co.uk/search?q=di...active&ssui=on
    "If you can keep your head, while those around you are losing theirs, you may not have grasped the seriousness of the situation."

    “Of all tyrannies, one sincerely exercised for the good of its victims may be the most oppressive. It would be better to live under robber barons than under omnipotent moral busybodies, for those who torment us for our own good will torment us without end for they do so with the approval of their own conscience...”
    paraphrased C.S. Lewis.

  4. #4

    Default

    There's a dilution calculator here;

    http://www.sigmaaldrich.com/chemistr...alculator.html

    I think it would be quite simple however, since you have a 12% concentration if you wanted 6% you could just add 60ml of water surely? Double the water content to dilute the chemical by half. Of course i could be wrong. But working on that you would need to add that 60ml to around 1.4 litres to get a 0.5% concentration.

    edit;

    1.38L i think might be more accurate.

    Tonyuk
    Last edited by Tonyuk; 11-08-2017 at 11:28.
    "I am not afraid of an army of lions led by a sheep; I am afraid of an army of sheep led by a lion."


    Alexander the Great

  5. #5
    Join Date
    Dec 2012
    Location
    Dublin
    Posts
    62

    Default

    Thanks for all the input and the links guys!

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