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Thread: Clorox and Freezing

  1. #1
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    Question Clorox and Freezing

    Will Clorox freeze if left outside. I have a case of 4 gallon containers at 12% solution. I wanted to store them in an outside shed.
    CyberGypsE

  2. #2
    chem geek is offline PF Support Team Whibble Konker chem geek 4 stars chem geek 4 stars chem geek 4 stars chem geek 4 stars
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    Default Re: Clorox and Freezing

    The freezing point depression of a 12% Sodium Hypochlorite solution (which also has 9.4% salt due to the manufacturing process of chlorine) is 15.3C or 27F so the freezing point is -15.3C or 5F. So unless you are expecting sustained temperatures well below freezing (i.e. closer to 5 degrees Fahrenheit or below), then it should be safe.

    The full calculation was determined from the following. 12% solution is (approximately; ignoring Trade % vs. weight % distinctions) 12 grams of sodium hypochlorite in 100 grams total. There is also 12*58.443/74.4422 = 9.42 grams of salt (from the way chlorine is produced) so that's 100-12-9.42 = 78.58 grams water. There is 12/74.4422 = 0.1612 moles times 4 for dissociation and salt (there is sodium, hypochlorite, sodium, chloride) so 0.6448 moles solute in 78.58 grams water so in 1000 grams (1 kilogram) that is 8.2 so that times 1.86 is 15.3C = 27F.


    Richard
    Last edited by chem geek; 11-05-2007 at 03:49 AM.

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    aylad is offline SuperMod Emeritus Vortex Adjuster aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars
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    Default Re: Clorox and Freezing

    Quote Originally Posted by CyberGypsE View Post
    Will Clorox freeze if left outside. I have a case of 4 gallon containers at 12% solution. I wanted to store them in an outside shed.

    You can always store them at my house...I assure you they won't freeze!

    Janet

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    Default Re: Clorox and Freezing

    Rich! Thank You for the info. Will store in shed, temps in Jersey usually don't drop that low.
    CyberGypsE

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    Default Re: Clorox and Freezing

    Janet, Just what I need a cold beer and a warm heart. Thanks for the offer
    CyberGypsE

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