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Is the caffeine from green tea that is extracted acidic? This goes for powder and liquid form.

If I add Alkaline water (pH: 7 or higher) will it change?

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The caffeine is in a free base form unless prepared otherwise . Caffeine is an alkaloid and a base , slightly alkaline. If you add base like naoh to it the solution will become more alkaline.

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  • $\begingroup$ Do you know where I can purchase the items in order to do a home test? $\endgroup$ – C. Copp Oct 9 '15 at 4:39
  • $\begingroup$ Do you mean to test the pH or extract the caffeine? $\endgroup$ – Technetium Oct 9 '15 at 4:43
  • $\begingroup$ where can I purchase both of those items? $\endgroup$ – C. Copp Oct 9 '15 at 4:45
  • $\begingroup$ They sell bromocresol purple or bromothymol blue as fish tank or soil ph testers. To extract the caffeine is more technical. A non polar extraction using Dichloromethane is how I achieved this in a laboratory I don't recommend to do this anywhere else. Pharmaceutical grade caffeine can be bought online or if you just want to know the result download an msds or call a company that sells the product and ask them the technical data. $\endgroup$ – Technetium Oct 9 '15 at 4:50
  • $\begingroup$ Thank you, that was very helpful. I don't know how to extract it myself, so I will buy it in pharmaceutical grade. $\endgroup$ – C. Copp Oct 9 '15 at 5:00

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