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Yes, bleach does freeze. There various concentrations of bleach and each will respond at a different temp.
Depending on the chlorine content of the bleach, will determine at what point the bleach will freeze. If you are talking about a bottle of house hold bleach then it will be around 18 to 19degrees 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 bellow freezing will start to affect the bleach once you get into the 18F to 20F degree range.
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