Bis(trimethylsilyl) phosphite

双(三甲基硅基)亚磷酸盐

Also known as: Bis(trimethylsilyl) phosphonate, Bis(trimethylsilyl) hydrogen phosphite, Phosphonic acid, bis(trimethylsilyl) ester, Silanol, trimethyl-, phosphonate (2:1), bis-(trimethylsilyl) phosphite, bis-(trimethylsilyl) phosphonate, HP(O)(OSiMe3)2, (Me3SiO)2P(O)H

Bis(trimethylsilyl) phosphite (CAS 3663-52-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H19O3PSi2 and a molecular weight of 226.35800 g/mol. It is also known as Bis(trimethylsilyl) phosphonate, Bis(trimethylsilyl) hydrogen phosphite and Phosphonic acid, bis(trimethylsilyl) ester. Key properties include a boiling point of 77-79ºC at 760 mmHg, a density of 0.968 g/mL at 20ºC and a flash point of 58 °C. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

3663-52-3

Jingsj CID

J-1143554-3

Molecular Formula

C₆H₁₉O₃PSi₂

Chinese Name

双(三甲基硅基)亚磷酸盐

Molecular Weight

226.35800 g/mol

Category

Organic Acids

Last updated

8/21/2026