▁ph arma ce ut ical s , ▁d yes , ▁and ▁p estic ides , ▁but ▁it ▁is ▁probably ▁best ▁known ▁as ▁a ▁food ▁add itive ▁used ▁in ▁processed ▁me ats ▁and ▁( in ▁some ▁countries ) ▁in ▁fish ▁products . ▁ ▁Us es ▁ ▁Indust rial ▁chem istry ▁The ▁main ▁use ▁of ▁sod ium ▁nit rite ▁is ▁for ▁the ▁industrial ▁production ▁of ▁organ on it ro gen ▁comp ounds . ▁It ▁is ▁a ▁re agent ▁for ▁conversion ▁of ▁am ines ▁into ▁dia zo ▁comp ounds , ▁which ▁are ▁key ▁prec urs ors ▁to ▁many ▁d yes , ▁such ▁as ▁dia zo ▁d yes . ▁N it ro so ▁comp ounds ▁are ▁produced ▁from ▁nit rit es . ▁These ▁are ▁used ▁in ▁the ▁rub ber ▁industry . ▁ ▁It ▁is ▁used ▁in ▁a ▁variety ▁of ▁met all urg ical ▁applications , ▁for ▁ph osph at izing ▁and ▁det in ning . ▁ ▁S od ium ▁nit rite ▁is ▁an ▁effective ▁cor ros ion ▁in hib itor ▁and ▁is ▁used ▁as ▁an ▁add itive ▁in ▁industrial ▁gre ases , ▁as ▁an ▁a que ous ▁solution ▁in ▁closed ▁loop ▁cool ing ▁systems , ▁and ▁in ▁a ▁mol ten ▁state ▁as ▁a ▁heat ▁transfer ▁medium . ▁ ▁Dru gs ▁ ▁S od ium ▁nit rite ▁is ▁an ▁efficient ▁drug ▁in ▁case ▁of ▁cy an ide ▁poison ing . ▁It ▁is ▁used ▁together ▁with ▁sod ium ▁th ios ulf ate . ▁It ▁is ▁on ▁the ▁World ▁Health ▁Organ ization ' s ▁List ▁of ▁Ess ential ▁Medic ines