Sodium trimethylsiloxide

Sodium trimethylsiloxide is an organosilicon compound with the formula NaOSi(CH₃)₃. It is the sodium salt of the conjugate base derived from trimethylsilanol.^[1] A white solid, its molecular structure consists of a cluster with Na-O-Na linkages on the basis of closely related compounds.^[2]

Sodium trimethylsiloxide

Names
Other names Sodium trimethylsilanoate, Sodium trimethylsilanolate
Identifiers
3D model (JSmol)	Interactive image
ChemSpider	78851
ECHA InfoCard	100.038.112
EC Number	241-939-8
PubChem CID	23672319
CompTox Dashboard (EPA)	DTXSID7066302
InChI InChI=1S/C3H9OSi.Na/c1-5(2,3)4;/h1-3H3;/q-1;+1 Key: HSNUIYJWTSJUMS-UHFFFAOYSA-N
SMILES C[Si](C)(C)[O-].[Na+]
Properties
Chemical formula	C3H9NaOSi
Molar mass	112.179 g·mol−1
Appearance	white solid
Density	1.255 g/cm3
Melting point	147–150 °C (297–302 °F; 420–423 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

The salt is used to prepare trimethylsiloxide complexes by salt metathesis. Trimethylsiloxide is a lipophilic pseudohalide.^[3][4]

It is a source of oxide dianion.^[5][6]

Related compounds

• Sodium silox, NaOSi(tBu)₃    (tBu = C(CH₃)₃)
• Potassium trimethylsilanolate^[7]