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Sorry if this is a silly question or one that has been answered hundreds of times.

 If your blue gas bottle freezes is it safe/ok to use again? We have kept ours in the shed over the winter (didn't feel comfortable having it in the house!!) and I have recently read threads about the bottles freezing which made me worry.

Thanks.

The bottle will be fine ....

Don't panic, just think about it, all the thousands of Calor gas bottles have to be stored outside at Calor's depots, and at the stockist's due to HSE regulations.so yours has had a nice winter being in the shed.!!

The freezing point of butane is minus 138 degrees Celsius, so I think it is extremely unlikely that it will have frozen in your shed.

At low temperatures, it is the boiling point that is the problem with Butane - that is the temperature at which the liquid in the bottle gasses off. Imagine boiling a kettle - if the water isn't heated enough it won't boil, or turn to it's gas form, so stays in the kettle rather than escaping as steam, or in the case of Butane it stays in the bottle instead of coming out as a gas so you can cook with it.

The boiling point of Butane is 0.5 degrees C - so at any temperatures below about 5 degrees C it becomes sluggish and won't come out as a gas at normal pressure, and at 0.5 it stays as a liquid and doesn't gas off at all.