Heated sand (by the sand bath) is used to provide evenheating for another container:)
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Sand baths are commonly used in chemistry labs for gentle and uniform heating of glassware and reactions. They provide a stable temperature environment for reactions that are sensitive to rapid changes in temperature. Sand baths are especially useful for heating flammable or volatile materials since they eliminate the risk of direct contact between the heating source and the material being heated.
There are a number of places one could obtain lab supplies for a chemistry lab. One can purchase such items from ebay, Laboratory-Directory and The Lab Warehouse.
Food and drinks are not allowed in the high school chemistry lab.
oven
In chemical factories,hospitals
These cloths are more flammable.