Do Campden Tablets Expire?

5 Answers. They should last at least 50 years, maybe hundreds. I've been using mine for 20 years. Campden tablets consist of sodium metabisulphite (an inorganic salt used as a preservative with no expiry date) and a binder, typically lactose or starch which also doesn't go off.

Is Campden tablets safe to drink?

Yes, it is safe to taste your brewing water. One-quarter of a tablet will treat five gallons of water to remove chloramines. You're still safe with one-half though. Both Chloramines and Chlorine that is.

How long does it take for Campden tablets to work?

If removing chlorine from water, half a tablet to 5 or 6 gallons will break it down in less than 10 minutes. If stabilizing apple juice when making cider to kill off wild yeast, deploy one crushed tablet per gallon of juice.