Baking soda’s (bicarbonate of soda) deodorization power is a result of its ability to neutralize odors, rather than just covering up odors with perfumes. Most unpleasant odors come from either strong acids (like sour milk) or strong bases (spoiled fish). Baking soda deodorizes by bringing both acidic and basic odor molecules into a neutral, more odor-free state.
Use baking soda as a personal deodorant for underarms and feet, and as a household deodorant on carpets, upholstery and in the fridge and freezer.
Baking Soda can also deodorize when it’s dissolved in water. So you can use baking soda as a mouthwash to neutralize garlic breath, as a diaper soak to neutralize that ‘ammonia’ smell (basic) and to deodorize plastic food containers that have absorbed that pickle or sauerkraut smell (acidic).