Bisulfite

Part of speech: noun

Definitions

A chemical compound containing sulfur, oxygen, and hydrogen commonly used as a preservative and reducing agent in food and industrial processes ; a salt or ester of bisulfurous acid where the bisulfite ion acts to prevent oxidation and spoilage ; a compound utilized in bleaching, water treatment, and as an intermediate in chemical reactions involving sulfur dioxide
A sulfur-containing ion or salt known for its ability to prevent discoloration and microbial growth in foods ; a reducing agent employed to maintain chemical stability by scavenging free radicals or oxygen ; a compound used in various industrial applications including paper bleaching, water purification, and chemical synthesis
A sulfur oxyanion often found as a salt with metals, serving as a preservative and antioxidant in food processing ; a chemical additive that inhibits enzymatic browning and helps stabilize products ; an agent involved in manufacturing and treatment processes where selective oxidation or reduction is required

Etymology: Sulfite comes from the old name for sulfur, which passed into English through Anglo-Norman "sulfre" and Middle English "sulphur," with the "-ite" ending added as a chemical naming pattern (the -ite suffix, borrowed through Latin and French from Greek "-ītēs," marks a salt or ester of a particular acid). Bisulfite is simply the "bi-" prefix, meaning "two," attached to sulfite. The prefix comes from the Latin "bi-," which shares its root with "two" in the Indo-European family, and it marks the salt that carries an extra acid unit compared with a plain sulfite. The result is a plain compound built from parts that were already in use. "Bi-" was used in chemical naming for acid salts that contain one more acid group than the parent salt, so the word describes its own chemistry: a sulfite with an additional hydrogen-bearing sulfur oxyanion attached. Its name therefore tells you its structure without any extra story behind it.

Synonyms: hydrogensulfite, sulfite, bisulphite