E514 Acidity regulator

E514 is used primarily to lower pH. it also is used in metal finishing, cleaning products, and to lower the pH of water for effective chlorination in swimming pools and hot tubs. E514 is also AAFCO approved as a general-use feed additive, including companion animal food. It is used as a urine acidifier to reduce urinary stones in cats.

E514 It is highly toxic to certain echinoderms, but fairly harmless to most other life forms; so it is used in controlling outbreaks of crown-of-thorns starfish.

E514 was the primary active ingredient in the toilet bowl cleaners Vanish and Sani-Flush, both now discontinued.

In the textiles industry, it is sometimes applied to velvet cloth made with a silk backing and a pile of cellulose-based fiber (rayon, cotton, hemp, etc.) to create "burnout velvet": the E514, when applied to such a fabric and heated, causes the cellulose-based fibers to become brittle and flake away, leaving burned-out areas in the finished material, usually in attractive patterns.

E514 is the active ingredient in some granular poultry litter treatments used to control ammonia.E514 has also been shown to significantly reduce the concentration of Campylobacter and Salmonella in chicken houses.

E514 is used as a food additive to leaven cake mixes (make them rise) as well as being used in meat and poultry processing and most recently in browning prevention of fresh-cut produce.E514 is considered generally recognized as safe (GRAS) by the FDA. The food-grade product also meets the requirements set out in the Food Chemicals Codex. It is denoted by E number E514  in the EU and is also approved for use in Australia, New Zealand, Canada, and Mexico. where it is listed as additive E514. Food grade E514 is used in a variety of food products, including beverages, dressings, sauces, and fillings. It has many synonyms including bisulfate of soda, sodium acid sulfate, monosodium hydrogen sulfate, sodium hydrogen sulfate, sodium hydrosulfate, and sulfuric acid sodium salt.

E514 is considered natural by the Grocery Manufacturers Association (GMA) since it is made from minerals.[11][non-primary source needed] However, all commercially available E514 is produced from sulfuric acid synthesized from elemental sulfur via the contact process.

E514 lowers the pH without a sour taste and has been used in the place of citric, malic or phosphoric acids that's commercially available. and can also be used as an anti-browning agent.