Orthosilicic acid

Orthosilicic acid
	Silicon, Si Oxygen, O Hydrogen, H
Names
	IUPAC name Silicic acid
	Other names Orthosilicic acid
Identifiers
CAS Number	10193-36-9 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:26675 ;
ChemSpider	14236 ;
ECHA InfoCard	100.030.421
EC Number	233-477-0;
Gmelin Reference	2009
PubChem CID	14942;
UNII	623B93YABH ;
CompTox Dashboard (EPA)	DTXSID5058721 ;
	InChI InChI=1S/H4O4Si/c1-5(2,3)4/h1-4H Key: RMAQACBXLXPBSY-UHFFFAOYSA-N ; InChI=1S/H4O4Si/c1-5(2,3)4/h1-4H Key: RMAQACBXLXPBSY-UHFFFAOYSA-N; InChI=1/H4O4Si/c1-5(2,3)4/h1-4H Key: RMAQACBXLXPBSY-UHFFFAOYAS;
	SMILES O[Si](O)(O)O;
Properties
Chemical formula	Si(OH)4
Molar mass	96.113 g·mol−1
Acidity (pKa)	pKa1 = 9.84; pKa2 = 13.2
Related compounds
Related compounds	Orthocarbonic acid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). (what is ?) Infobox references

Orthosilicic acid (/ˌɔːrθəsɪˈlɪsɪk/) is an inorganic compound with the formula Si(O H)₄. Although rarely observed, it is the key compound of silica and silicates and the precursor to other silicic acids [H_2xSiO_x+2]_n. Silicic acids play important roles in biomineralization and technology. It is the parent acid of the orthosilicate anion SiO⁴⁻
₄.