Sodium iodide

Sodium iodide (NaI, CAS 7681-82-5) is an inorganic salt formed from sodium and iodine, also known as sodium monoiodide or hydriodic acid sodium salt. It carries no E-code designation and is distinct from potassium iodide, though both serve as iodine sources across industrial applications.

In pharmaceutical manufacturing, sodium iodide acts as a catalyst in the Finkelstein reaction, converting alkyl chlorides and bromides into more reactive alkyl iodides. In animal nutrition and agriculture, it delivers bioavailable iodine to correct deficiencies in livestock feed formulations. It also functions as a flame retardant additive by releasing iodine radicals that interrupt combustion chain reactions.

Sodium iodide is available in crystalline bead form and supplied in pharmaceutical-grade (Ph.Eur.), food-grade (FCC), and technical grades depending on application requirements. It falls under REACH regulation and is classified under HS code 28276000. Procurement teams should confirm grade specifications against relevant pharmacopoeia or feed additive standards before ordering.