Andyd
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Napi-San
Napi-San is not a true sanitiser, but does have some sanitising qualities. It is basically made up of Sodium Carbonate (washing soda) and Sodium Percarbonate. Sodium Percarbonate is the active ingredient, while Sodium Carbonate is the emulsifier/detergent agent. Sodium Percarbonate breaks down into Sodium Carbonate and Hydrogen Peroxide. It is this Hydrogen Peroxide that is the sanitising agent in Nappi-San.Nappi-San requires very hot water (above 65*c ) to work effectively. The hot water allows the Peroxide to form, and do its sanitizing
Nappi-San will not stain or attack plastics, metals or glass, however you will need to rinse it off after use, although it is non-toxic and you wont die if you dont rinse.
Napi-San makes for one of the best soak cleaners available. It will readily remove organic matter (trub, yeast etc) from brewing gear, and as it does not attack materials (like bleach sometimes can), items can be left to soak for long periods of time without problems.
Yeah - Napisan does have some sanitising properties, but it suffers because it definietely needs to be rinsed before you use the vessel... and rinsing is sure to introduce bugs unfortunately.
In fact, one of the biggest mistakes made by people starting out with Iodophor is they don't trust the no-rinse properties, and decide to rinse - and that negates everything you've done with the sanitiser.
Go for a good no-rinse sanitiser, and make sure everything you're using is wet with sanitiser before you use it on the cold side.
Regards,
Andy