Other Information: Each 1/2 teaspoon contains 616mg sodium. The standard of purity. America's no. 1 trusted baking soda brand. Hundreds of uses like: Fresh box for baking. Since an open box of baking soda naturally absorbs unwanted smells and odors, always use a fresh, unopened box of arm & hammer baking soda to make the best tasting cookies and cakes. Write the date that is 30 days from opening the box. Change every 30 days. Money back guarantee. We unconditionally guarantee 100% satisfaction. If you are not satisfied in any way, please our Consumer Relations Department toll-free at: 1-800-524-1328, M-F 9am-5pm ET armhammer.com. how2recycle.info. For more DIY ideas scan the code below. Proud supporter of Arbor Day Foundation. Join our simple solutions community for baking soda tips and offers. Simple Solutions by Arm & Hammer. Sign up at AHSolutions.com. Use a new box each month for fresher tasting food. Certified renewable energy. Green-e. Made with 100% certified renewable electricity. Box made from 100% recycled paperboard (minimum 35% post-consumer content).