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Q&A Is it safe to use water purification tablets after their expiration date?

As I understand it, water purification tablets (Chlorine, in this case) are just chemical tablets sealed in foil. So what causes them to expire? Are they still safe to use after their expiration da...

2 answers  ·  posted 12y ago by berry120‭  ·  last activity 12y ago by System‭

Question water-purification