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Sodium periodate
IUPAC name
CAS number 7790-28-5 Yes check.svgY
PubChem 65184
EC number 232-197-6
RTECS number SD4550000
ChemSpider ID 58683
Molecular formula NaIO4
Molar mass 213.8918 g/mol
Density 3.865 g/cm3
Melting point

300 °C

Solubility in water soluble
Related compounds
Other anions sodium perchlorate, sodium perbromate
Other cations potassium periodate
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Sodium periodate can refer to two different chemical compounds which are essentially sodium salts of the two varieties of periodate ion. Sodium metaperiodate (often abbreviated as m-periodate) has the formula NaIO4. Sodium orthoperiodate (often abbreviated as o-periodate) has the formula Na5IO6. Both salts are useful in certain synthetic chemistries for the oxidative power of the periodate ion.

Density is 3,865 kg m−3. It is soluble in water. When heated, it decomposes to form sodium iodate (NaIO3) and oxygen. This decomposition reaction is catalyzed by the presence of manganese(IV) oxide.

Sodium periodate is used to oxidize cellulose and create a biocompatible and biodegradable compound that can be used as suture, as a scaffold for tissue engineering, or for drug delivery.

Sodium periodate can be used in solution to open saccharide rings between vicinal diols leaving two aldehyde groups. This process is often used in labeling saccharides with fluorescent molecules or other tags such as biotin. Because the process requires vicinal diols, periodate oxidation is often used to selectively label RNA (ribose has vicinal diols) instead of DNA as deoxyribose does not have vicinal diols.



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