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Quaternary ammonium compound solubility

  1. Dec 14, 2011 #1
    Hello all,

    I have a question about the solubility of a certain compound. The compound in question is a quaternary ammonium compound 60-80% concentration, 10-20% isopropanol, and 1-10% water.

    Is isopropanol the best organic solvent for this compound or would a combination of isopropanol and water be a better solvent? There is also a possibility that another organic solvent is more suitable for the quaternary ammonium compound.

    Thank you in advance.
  2. jcsd
  3. Dec 15, 2011 #2


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    Staff: Mentor

    Quaternary compounds are ionic, so water can be necessary to "neutralize" counteranion.
  4. Dec 19, 2011 #3


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    Science Advisor
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    Gold Member

    It depends on the counterion and the quat. A large greasy quat coupled with a non-coordinating counterion like tetraphenylboron or hexaphenylphosphate might make the quat less soluble in water.
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