Sodium Sulfite is a white odorless powder. Density 2.633 g/cm3. Moderately toxic. Sinks in water and dissolves slowly. Sodium Sulfite is a white crystal or powder with reducing property. Sodium sulfite exhibits bleaching, de-sulfurizing, and dechlorinating activities. This agent was used by food industry to help maintain the fresh appearance of food products. It is also a component in many drugs, which helps maintain their potency and stability. FDA has ruled sodium sulfite a new animal drug of low regulatory priority.