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Inspired by this question but I believe different because its not related to drinking.

Can you use carbonated, and even flavored clear water (seltzer) to do things that require water such as washing netilas yadayim, mayim achronim, tevilah in a mikvah etc?

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A mikvah has to be rain water, so it probably won't work for that. – Daniel Aug 4 '13 at 3:43
@Daniel And why can't you carbonate rain water? – Double AA Aug 4 '13 at 4:32
@Daniel: en.wikipedia.org/wiki/Perrier#About – Menachem Aug 4 '13 at 5:21
Mayim Aharonim you for sure can. I would think Netilat Yadaim also as long as it doesn't change color. – Hacham Gabriel Aug 4 '13 at 6:25
Mayim achronim you can use soda – sam Aug 4 '13 at 7:52

The Posekim write that you can do Mayim Aharonim with anything other than hot water [Gemara in Hulin quoted in all the Posekim](110 degrees or so [acc. to Rav Moshe]- Yad Soledet) or wine (Bediavad you can use wine). So carbonated water would be fine.

Ben Ish Hai Parashat Shalah 11:

ואם אין לו מים יטול בשאר משקין ואפילו ביין כיון דאין לו ליטול בענין אחר

If you have no other choice you can use wine.

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Which Poskim and where? – Yirmeyahu Aug 5 '13 at 2:34
@Yirmeyahu done. – Hacham Gabriel Aug 5 '13 at 13:46

Netilat yadayim? Just has to look like water; I'd spoken this over with several people and it was concluded that a clear lemon-lime soda would work too. (Though yuck, what a mess). Certainly seltzer.

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See Rivevos Ephraim 7:278:10 on using red wine for washing. – sam Aug 5 '13 at 4:35

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