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Q: Does bleach freeze if left outside during cold winters, and if so, around what temperature does it freeze?
A: Yes, bleach does freeze. There are various concentrations of bleach, and each will respond at a different temperature.
The chlorine content of the bleach will determine at what point the bleach will freeze. If you are talking about a bottle of household belach, then it will be around 18 or 19 degrees F. This will also depend on windchill if the bleach is outside of a protective structure. To be on the safe side, any long term cold below freezing will start to affect the bleach once you get in to the 18-20 degree range (Fahrenheit).
-- Answer from Charles M., home improvement Expert on JustAnswer
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