Answer: sulfites

AnswerCrossword Clue
sulfitesany sulfite-containing compound, esp. one that is used in foods or drug products as a preservative and that can cause severe allergic reactions in susceptible individuals: use in fresh fruits and vegetables banned by the FDA in 1986
sulfitesSULFITE, a chemical salt, also SULPHITE
sulfitessalt or ester of sulfurous acid