6kg Sodium Bicarbonate of Soda (6 x 1kg) - 100% BP/Food Grade - Cheapest on eBay
Sodium Bicarbonate - 6 x 1KG - 100% BP/Food Grade. In its natural form, baking soda is known as nahcolite, which is part of the natural mineral natron. For instance, the Egyptians used natron as a soap for cleansing purposes.