What is The Difference Between Bicarbonate of Soda Bought from a Chemist and Bicarb Bought In Supermarkets? Answer: There is no difference. All of the bicarb will be about as useful as a wet organic cotton sock used as a beanie during a winter storm while stuck on Mt Everest. Bicarbonate of soda is made to absorb chemicals, odours and air particle residues. It was used in … [Read more...] about Bicarb from a Chemist or the Supermarket?