What Is Potassium Iodate?
Potassium iodate, with the chemical formula HIO3, is noted for its CAS number 7782-68-5. This relatively strong acid demonstrates significant oxidizing power and can be crystallized, distinguishing it from other halide oxoacids.
Uses of Potassium Iodate
Employed as a medical astringent, disinfectant, and analytical reagent, potassium iodate’s stability in the air facilitates its handling. Its oxidative properties make it useful in analytical chemistry for titrating various iodine compounds and determining mercury and lead levels. It’s also utilized in X-ray film development and as a crystal nucleus for artificial rainfall.
Properties of Potassium Iodate
Appearing as a white crystal or powder, potassium iodate has a molecular weight of 175.91 and melts at 110°C. It’s highly soluble in water, showcasing its strength as an acid with a density of 4.62 g/mL and a pKa of 0.75.
Types of Potassium Iodate
Available as a reagent for research and as an industrial fine chemical, potassium iodate is offered in various quantities suitable for both laboratory and factory applications.
Other Information on Potassium Iodate
1. Synthesis of Potassium Iodate
Produced through the oxidation of iodine by several agents or by dissolving diiodine pentoxide in water, potassium iodate’s synthesis methods highlight its reactive nature.
2. Chemical Reaction of Potassium Iodate
In solution, it dissociates to iodate ions, acting as a potent oxidant in acidic solutions but less so in basic ones. Its reactivity with various substances necessitates careful storage away from light and incompatible materials.
3. Contrast With Other Oxoacids
While similar oxoacids like chloric and bromic acid cannot be isolated, potassium iodate stands out for its ability to be crystallized. Its existence alongside other iodine oxoacids of varying oxidation states further underscores its unique chemical properties.
4. Iodic Acid Salts
Its salts, including ammonium, potassium, and sodium iodates, are recognized for their hazardous nature, necessitating careful handling.
5. Potassium Iodate Hazard Information
As an oxidizing solid, potassium iodate poses risks of skin corrosion and irritation, classified under GHS and regulated for its hazardous and toxic nature.