PRODUCT IDENTIFICATION

H.S. CODE

TOXICITY

CLASSIFICATION

PHYSICAL AND CHEMICAL PROPERTIES

11.0

REFRACTIVE INDEX

Stable under ordinary conditions

APPLICATIONS

Iodine is a nonmetallic halogen element in Group 17 of periodic table; atomic number 53; atomic mass 126.9; melting point ca 114 C; boiling point ca 184 C; specific gravity 4.93 g/cm³; oxidation states: 7,5,1,-1; [Kr] 4d10 5s2 5p5. Iodine is a nearly black poisonous, corrosive solid at room temperature and readily sublimes to a deep violet vapour, the colour of which is responsible for its name from Greek. It is insoluble in water, soluble in common solvents. Iodine is required in small amounts in human body for the function of the thyroid gland. Iodine forms many important compounds of iodine such as iodine(V)oxide, potassium iodide, iodine trichloride and iodoform of an Iodine containing organic compound.

The related name, iodate indicates any salt of iodic acid containing the IO₃^- radical; KIO₃ (potassium iodate) and NaIO₃ (sodium iodate) are the most important salts. Whereas, iodide indicates any compound of iodine with a more electropositive element or group such as such as CH₃CH₂I or any binary compound of iodine which may contain the I^- radical and which may be considered to be derived from hydriodic acid (HI); KI and NaI are examples.

Inorganic iodide compounds are soluble in water and hygroscopic except a few inorganic iodides such as copper iodide. Their refractive indexes and specific gravities are higher than the corresponding chlorine and bromine analogues. The important iodides commercially are potassium iodide (KI), sodium iodide (NaI), hydrogen iodide (HI), and polyiodides. Iodine pentoxide is an oxidizing agent used in organic synthesis.

APPEARANCE

PURITY

99.0% min

Fe

0.005% max

HEAVY METALS

0.005% max

WATER INSOLUBLES

0.02% max