calcium hydroxide 95%pure and 96% AR, difference?

Discussion in 'General Reef Topics' started by nanomania, Nov 8, 2012.

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  1. nanomania

    nanomania Vagabond Butterfly

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    Im planning to shift to kalk soon. Since my dad is into chemical trading business, i have access to all the chemicals and iv been making to dose my reef tank. When i went to buy kalk, it had 2 grades, 1 was 95%pure and 1 was 96%pure AR. the price difference was vast and when i saked them, they just said its purer. well i dont mind buying AR quality but can someone please tell me the difference and is it wort or not? any guys who knows about chemicals in detail?
     
    nanomania, Nov 8, 2012
    nanomania, Nov 8, 2012
    #1

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  2. Dingo

    Dingo Giant Squid

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    Not sure what te AR is. If it means lab grade or pharmaceutical grade then it is better.
    With the high pH, most metals and impurities will precipitate... However if copper is used as a binder there is a slight chance that over time it will very gradually build up in tank from additions.
     
    Dingo, Nov 8, 2012
    Dingo, Nov 8, 2012
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  3. Moxtrain

    Moxtrain Peppermint Shrimp

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    AR probably means Arrhenius. Just a guess.
     
    Moxtrain, Nov 8, 2012
    Moxtrain, Nov 8, 2012
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  4. Bustopher

    Bustopher Skunk Shrimp

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    Is this Food Grade? Chuna? Industrial?
     
    Bustopher, Nov 8, 2012
    Bustopher, Nov 8, 2012
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  5. nanomania

    nanomania Vagabond Butterfly

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    its not food grade... but here is what i got online searching for types of chemical grades:

    AR - The standard Mallinckrodt grade of analytical reagents; suitable for laboratory and general use. If the reagent also meets the requirements of the American Chemical Society Committee on Analytical Reagent, it will be denoted as an AR (ACS) reagent. (MBI trademark)
     
    nanomania, Nov 8, 2012
    nanomania, Nov 8, 2012
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  6. nanomania

    nanomania Vagabond Butterfly

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    anyone?
     
    nanomania, Nov 9, 2012
    nanomania, Nov 9, 2012
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  7. Bustopher

    Bustopher Skunk Shrimp

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    Do you know what industry these are normally marketed to? Like: Food, Pham/med, Industrial, construction?

    I have found that 4-5% of impurities can vary depending on what it's made for. Some Slack or Quicklime for construction can have all kinds of metals in it where as Pickling or Cal is fine cause its food grade.
     
    Bustopher, Nov 9, 2012
    Bustopher, Nov 9, 2012
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  8. Moxtrain

    Moxtrain Peppermint Shrimp

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    Might as well try for GR or ACS first from pops but if he cant help the AR would probably be ok.
     
    Moxtrain, Nov 9, 2012
    Moxtrain, Nov 9, 2012
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  9. nanomania

    nanomania Vagabond Butterfly

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    AR = laboratory and general use.... thats what i found online... i guess ill ask him if he can get it and i can click a photo of impurities...
     
    nanomania, Nov 9, 2012
    nanomania, Nov 9, 2012
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  10. Dingo

    Dingo Giant Squid

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    Even the pickling lime can have copper in it. Randy did an article on it. I used to use it and had a copper crash (not saying it was strictly from the kalk though)
    Now I only use as pure as I can get my hands on.
     
    Dingo, Nov 10, 2012
    Dingo, Nov 10, 2012
    #10
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