Sodium orthosilicate

Sodium orthosilicate
	Chemical structure of sodium orthosilicate
Names
	IUPAC name Tetrasodium silicate
	Other names Sodium orthosilicate
Identifiers
CAS Number	13472-30-5 ;
3D model (JSmol)	Interactive image;
ChemSpider	24265 ;
ECHA InfoCard	100.033.387
EC Number	236-741-3;
PubChem CID	26051;
UNII	TEU2JIC5PA ;
UN number	1759
CompTox Dashboard (EPA)	DTXSID6065501 ;
	InChI InChI=1S/4Na.O4Si/c;;;;1-5(2,3)4/q4+1;-4 Key: POWFTOSLLWLEBN-UHFFFAOYSA-N ; InChI=1S/4Na.O4Si/c;;;;1-5(2,3)4/q4+1;-4 Key: POWFTOSLLWLEBN-UHFFFAOYSA-N;
	SMILES [O-][Si]([O-])([O-])[O-].[Na+].[Na+].[Na+].[Na+];
Properties
Chemical formula	Na4O4Si
Molar mass	184.040 g·mol−1
Appearance	White powder
Melting point	1,018 °C (1,864 °F; 1,291 K)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H314, H335
Precautionary statements	P260, P301+P330+P331, P303+P361+P353, P305+P351+P338, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). (what is ?) Infobox references

Sodium orthosilicate is the chemical compound with the molecular formula Na
₄SiO
₄. It is one of the sodium silicates, specifically an orthosilicate, formally a salt of the unstable orthosilicic acid H
₄SiO
₄.