As a food additive magnesium carbonate is known as E504.
Magnesium carbonate, most often referred to as 'chalk', is used as a drying agent for hands in rock climbing, gymnastics, and weight lifting.
Orders will be processed and shipped within 1-3 business days of receipt. Delivery time may vary depending on destination of the order. Because we use ground service for our deliveries, orders shipped to the west coast may take several days.