Alibaba offers 3,903 magnesium carbonate for gymnastic chalk products. about 13% of these are weight lifting, 1% are carbonate. a wide variety of magnesium carbonate for gymnastic chalk options are available to you, such as food grade, medicine grade, and industrial grade. There are 596 gymnastics magnesium powder suppliers, mainly located in asia. the top supplying countries or regions are china, taiwan, china, which supply 99%, 1% of gymnastics magnesium powder respectively. gymnastics magnesium powder products are most popular in united states, germany, and united arab emirates. Magnesium carbonate is insoluble and does not dissolve in water. because of its insolubility, magnesium carbonate is often used in table salts to prevent clumping. also, often referred to as chalk, magnesium carbonate is commonly used by athletes as a drying agent to aid with grip in sports like rock climbing, gymnastics, baseball, and weight ... Size: 250 grams (8.8 oz) powder. product dimensions: 6 x 2.5 x 8.2 inches. shipping weight: 6.4 ounces (view shipping rates and policies) asin: b00eowinr2. upc: 764442248702 849720006349. california residents: click here for proposition 65 warning. average customer review: 4.4 out of 5 stars 249 customer reviews.