Caffeine anhydrous (without water) is the processed, dehydrated form of caffeine. It's becoming an increasingly popular supplement among athletes and those with specific weight loss goals and is often the form of caffeine found in caffeinated chewing gum and energy bars. Natural Caffeine Anhydrous is obtained 100% from green coffee beans. Due to the process of creating anhydrous caffeine, it is a much more potent form of powdered caffeine, thus making it a much more efficient way to supplement caffeine. Olfactive Profile : Odorless CAS No : 58-08-2 EC No : 200-362-1 FEMA No : 2224