Citric Acid 5k Citric Acid 5k £30.00 Out of Stock - Back soon We use a very high quality citric acid perfect for making a smooth, fizzy hard bathbomb. We sell in quanities from 1k through to 25k. Our Citric acid is 30-100 mesh, anhydrous (without water) this creates a harder, smooth finish, we find that this is the best citric for us to work with for our bathbombs. When making bathbombs the citric needs to be mixed with sodium bicarbonate 1 part citric to 2 parts bicarb, or 3 bicarb to 1 citric. As well as bathbomb making citric acid has many other uses such as degreasing and home cleaning.