Sodium bisulphate is naturally occurring, colorless and granular in form. It is hygroscopic (absorbs atmospheric moisture) and melts at 136 degrees Fahrenheit. Solubility is 67 gm per 100 gm water and its equilibrium PH is 1.4.
It is produced in large quantities through neutralization of sulfuric acid by sodium hydroxide (a base), and also by reaction of sodium chloride (ordinary salt) and sulfuric acid.
The acidic and anti-bacterial properties of sodium bisulphate have been exploited in industrial, agricultural and food applications. It is used principally as an acidifier. Major applications include cleaning and metal finishing products, feed and pet food additives.
Food grade sodium bisulphate is used in a variety of foods including beverages, dressings, sauces and fillings and it is used in meat and poultry processing.
In pure form sodium bisulphate is a corrosive irritant. It burns skin and eyes, and may be harmful or fatal if ingested. It is stable in storage, but exposure in air leads to noxious decomposition products such as sulfur dioxide. It should be handled with care.