How Effective is Old Bleach for Disinfection?
Learn if old bleach can still disinfect effectively and how to test its potency.
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Old bleach can still disinfect, but its effectiveness diminishes over time. Typically, bleach loses potency after six months. Check the expiration date or perform a simple test by diluting 1 part bleach with 9 parts water and checking for a strong chlorine smell. If faint or absent, it's better to replace the bleach.
FAQs & Answers
- How can I tell if my bleach is still good? Check the expiration date or perform a dilution test to see if there’s a strong chlorine smell.
- What happens if I use expired bleach? Expired bleach may not disinfect effectively, risking ineffective cleaning.
- How long does bleach last once opened? Typically, opened bleach lasts about six months before its potency diminishes.
- Can I use old bleach for cleaning surfaces? Yes, but ensure it's still effective by checking its potency before use.