As a preservative<unk>  can act as a food preservative. It is most widely used in acidic foods such as salad dressings (for example acetic acid in vinegar), carbonated drinks (carbonic acid), jams and fruit juices (citric acid), pickles (acetic acid), condiments, and frozen yogurt toppings. It is also used as a preservative in medicines and cosmetics. Under these conditions it is converted into benzoic acid (E210), which is bacteriostatic and fungistatic. Benzoic acid is generally not used directly due to its poor water solubility. Concentration as a food preservative is limited by the FDA in the U.S. to 0.1% by weight.<unk>  is also allowed as an animal food additive at up to 0.1%, per the Association of American Feed Control Officials.<unk>  has been replaced by potassium sorbate in the majority of soft drinks in the United Kingdom.<unk>  was one of the chemicals used in 19th century industrialised food production that was investigated by Dr. Harvey W. Wiley with his famous 'Poison Squad' as part of the US Department of Agriculture. This led up to the 1906 Pure Food and Drug Act, a landmark event in the early history of food regulation in the United States. In pharmaceuticals<unk>  is used as a treatment for urea cycle disorders due to its ability to bind amino acids. This leads to excretion of these amino acids and a decrease in ammonia levels. Recent research shows that<unk>  may be beneficial as an add-on therapy (1 gram/day) in schizophrenia. Total Positive and Negative Syndrome Scale scores dropped by 21% compared to placebo.<unk> , along with phenylbutyrate, is used to treat hyperammonemia.<unk> , along with caffeine, is used to treat postdural puncture headache, respiratory depression associated with overdosage of narcotics, and with ergotamine to treat vascular headache. Other uses<unk>  is also used in fireworks as a fuel in whistle mix, a powder that emits a whistling noise when compressed into a tube and ignited.
Sodium benzoate
Sodium fluoride
Potassium iodide
Potassium fluoride
Dimethyl methylphosphonate
Amylmetacresol
Amine fluoride
Sodium thiosulfate 