If anhydrous conditions are necessary for reaction, often CaCl2 filled tubes are used (like this).
If any special thing is needed, then instead of CaCl2, P2O5, NaOH or anything else could be used.
If anhydrous conditions are necessary for reaction, often CaCl2 filled tubes are used (like this).
If any special thing is needed, then instead of CaCl2, P2O5, NaOH or anything else could be used.
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