In my lab manual, it is given that alcoholic KOH should be the base used in carbylamine test. However as it was not available, I used 10℅ NaOH. The test results came out positive. (Yes, it was actually a 1° amine) Is there any reason to prefer alcoholic KOH over NaOH?


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My memory tells me that KOH is more soluble in ethanol than NaOH. The chemistry is the same, just more efficient at the higher concentration.

  • $\begingroup$ What's the use of ethanol? The elimination at the last step? $\endgroup$ Commented Feb 9, 2017 at 1:53

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