Bubble salt is a washed, refined and food grade kiln dried product with a typical crystal size of 1.7mm. Sodium Chloride 99.6% (Bubble salt) is a larger crystal salt that is used in the food industry and commonly used for salt grinders and the salt base for bath salts. This grade of salt is Kosher and Halal certified and comply with FSANZ and HACCP to ensure the product’s quality and safety.