Working on a smaller scale
E.g. less risk of inhaling fumes with smaller amounts of chemicals
Taking specific precautions or using alternative techniques depending on the properties of the hazardous substance you are using.
E.g. Using the lowest possible concentrations. Chemicals are then irritants, not corrosive.
Careful use of safety measures.
E.g. fume cupboard
Changing the conditions under which a reaction takes place
E.g. lowering temperature will slow the rate of the reaction down
Using alternative methods with less hazardous substances
E.g substituting chemicals for less hazarous ones.
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