甲基三乙酰氧基硅烷

Description

Methyltriacetoxysilane · CAS 4253-34-3 · C7H12O6Si. UNII W4FX3GZ7AB. Melting Point: 40.5 °C; Density: 1.175 @ 20°C; Vapor Pressure: 0.2 [mmHg].

Identification

CAS Registry Number	4253-34-3
PubChem CID	77929
Molecular formula	C7H12O6Si
IUPAC name	[diacetyloxy(methyl)silyl] acetate
UNII (FDA)	W4FX3GZ7AB

Computed Descriptors

Molecular Weight	220.25
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	6
Rotatable Bond Count	6
Exact Mass	220.04031463
Monoisotopic Mass	220.04031463
Topological Polar Surface Area	78.9
Heavy Atom Count	14
Formal Charge	0
Complexity	220

Physical & Chemical Properties

Melting Point	40.5 °C
Density	1.175 @ 20°C
Vapor Pressure	0.2 [mmHg]

Physical description & handling notes

• Liquid; Other Solid; Liquid
• Solid; [Alfa Aesar MSDS]

Regulatory Status

GHS notification summary	0.9% (5 / 561)

GHS Hazard Classification

GHS notification summary	0.9% (5 / 561)
Reported hazard statements	H302 (73.6%), H314 (85.2%), H315 (20.7%), H318 (23%), H319 (20.5%), H335 (13.7%), H371

Documented Uses

• Used as a cross-linker for silicone sealants and adhesives (completely reacts during curing); [OECD SIDS: Methyltriacetoxysilane - 2005]
• Working with Glues and Adhesives [Category: Other]
• Information on 47 consumer products that contain Methyltriacetoxysilane in the following categories is provided:
• 2023: 1,000,000 - <5,000,000 lb
• 2022: 1,000,000 - <5,000,000 lb
• 2021: 1,000,000 - <5,000,000 lb

Synonyms

Methyltriacetoxysilane; 4253-34-3; Methylsilanetriyl triacetate; Silanetriol, methyl-, triacetate; EINECS 224-221-9; Silanetriol, 1-methyl-, 1,1,1-triacetate; triacetoxy(methylsilane); NSC 139845; DTXSID0027565; BRN 1788668; EC 224-221-9; 4-04-00-04208 (Beilstein Handbook Reference); DTXCID507565; CM8980; Silane, methyltriacetoxy; RefChem:158342

Frequently Asked Questions

What are the CAS number and molecular formula of Methyltriacetoxysilane?

CAS 4253-34-3; molecular formula C7H12O6Si; molecular weight — g/mol.

What other names is Methyltriacetoxysilane known by?

Methyltriacetoxysilane, 4253-34-3, Methylsilanetriyl triacetate, Silanetriol, methyl-, triacetate, EINECS 224-221-9, Silanetriol, 1-methyl-, 1,1,1-triacetate.

Is Methyltriacetoxysilane classified as hazardous?

0.9% of GHS notifications report no hazard classification (5 of 561).

What are the key physical properties of Methyltriacetoxysilane?

Melting Point: 40.5 °C; Density: 1.175 @ 20°C; Vapor Pressure: 0.2 [mmHg].

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.