http://tinyurl.com/kgnr22s
Natural Sodium Sulfate Food Grade FCC 99+% Granular Anhydrous Crystals Salt Made in USA
99+% Pure, Crystalline/Granular, Anhydrous (without water)
Food Grade / FCC (Food Chemical Codex)
Excellent Drying Agent and Electrolyte / Salt
Made in the USA
See Description on how to make Glauber's Salt