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  1. #1
    Junior Member
    Join Date
    Oct 2007

    Cleaning drip and espresso coffee makers

    Since \"Durgol\" is 15% Sulfamic acid. Is it safe to buy a pound of Sulfamic acid (for $5.00) at a local home improvement store and make up your own cleaning solution?

  2. #2
    Junior Member
    Join Date
    Oct 2007
    Most commercial cleaners are made from:

    Sodium Percarbonate Na2CO3
    Sodium Tripolyphosphate Na5P3O10
    Trisodium Phosphate Na3PO4

    The Sodium percarbonate in aqueous solution produces produces Sodium Carbonate and Hydrogen Peroxide.

    [Na2CO3]2 + 3 H2O = 2Na2CO3 + 3 H2O2

    The Peroxide acts as a bleaching agent. The Sodium Carbonate Produced increases the pH of the solution to stabalise the Hydrogen Peroxide so that it remains in solution to do its work, (rather than breaking down into oxygen and being released)

    The Sodium Tripolyphosphate is stain remover and degreaser

    The Sodium Tripolyphosphate is a builder and is used to improe the effectiveness of soaps and cleaners.

    Other cleaners also use

    Sodium Tetraborate (Borax) Na2B4O7.10H2O - A Detergent

    Sodium Perborate NaBO3.H2O - Bleaching / Active Oxygen

    To make your own cleaner I think you'll need 3 components...


    2)Bleaching Agent

    3)Buffer / Stabiliser

    As far as using straight sulfamic acid, I'd like to know what the other 85% of ingredients are first, to see whats going on.

    Most Commercial Descalers use Sulfamic Acid, Maleic Acid and Citric Acid, you can use cirtic acid by itself in solution as a descaler in commercial and domestic machines with no problems, its non-toxic and you can taste it so you know when its all flushed from the system.



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