Sodium periodate

Sodium periodate
Names
	IUPAC name Sodium periodate
	Other names Sodium metaperiodate
Identifiers
CAS Number	meta: 7790-28-5 ; para: 13940-38-0; trihydrogen: 15599-97-0;
3D model (JSmol)	meta: Interactive image; para: Interactive image; ortho: Interactive image; trihydrogen: Interactive image;
ChEBI	meta: CHEBI:75226 ;
ChemSpider	meta: 58683 ; para: 7971889; trihydrogen: 129318857;
ECHA InfoCard	100.029.270
EC Number	meta: 232-197-6; para: 237-720-1; trihydrogen: 239-681-6;
PubChem CID	meta: 23667635; para: 9796123; ortho: 21982945; trihydrogen: 22765006;
RTECS number	meta: SD4550000;
UNII	meta: 98W4A29X43 ;
CompTox Dashboard (EPA)	meta: DTXSID30894075 ;
	InChI InChI=1S/HIO4.Na/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1 Key: JQWHASGSAFIOCM-UHFFFAOYSA-M ; meta: InChI=1/HIO4.Na/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1 Key: JQWHASGSAFIOCM-REWHXWOFAO; para: InChI=1S/H5IO6.3Na/c2-1(3,4,5,6)7;;;/h(H5,2,3,4,5,6,7);;;/q;3+1/p-3 Key: DSYMXPNUZLZKOA-UHFFFAOYSA-K; ortho: InChI=1S/H5IO6.5Na/c2-1(3,4,5,6)7;;;;;/h(H5,2,3,4,5,6,7);;;;;/q;5+1/p-5 Key: RAJUJHHGBPSUAC-UHFFFAOYSA-I; trihydrogen: InChI=1S/H5IO6.2Na/c2-1(3,4,5,6)7;;/h(H5,2,3,4,5,6,7);;/q;2*+1/p-2 Key: PEPDKRLBEGSBRW-UHFFFAOYSA-L;
	SMILES meta: [O-]I(=O)(=O)=O.[Na+]; para: OI(=O)(O)([O-])([O-])[O-].[Na+].[Na+].[Na+]; ortho: [O-]I(=O)([O-])([O-])([O-])[O-].[Na+].[Na+].[Na+].[Na+].[Na+]; trihydrogen: OI(=O)(O)(O)([O-])[O-].[Na+].[Na+];
Properties
Chemical formula	NaIO4
Molar mass	213.8918 g/mol
Appearance	white crystals
Density	3.865 g/cm3 (anhydrous) ; 3.210 g/cm3
Melting point	300 °C (572 °F; 573 K) (anhydrous) ; 175 °C (347 °F; 448 K) (trihydrate) (decomposes)
Solubility in water	91 g/L
Solubility	soluble in acids
Structure
Crystal structure	tetragonal (anhydrous) ; trigonal (trihydrate)
Hazards
NFPA 704 (fire diamond)	2 0 3 OX
Related compounds
Other anions	sodium perchlorate, sodium perbromate
Other cations	potassium periodate, periodic acid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Sodium periodate is an inorganic salt, composed of a sodium cation and the periodate anion. It may also be regarded as the sodium salt of periodic acid. Like many periodates, it can exist in two different forms: sodium metaperiodate (formula‍ NaIO₄) and sodium orthoperiodate (normally Na₂H₃IO₆, but sometimes the fully reacted salt Na₅IO₆). Both salts are useful oxidising agents.