512990

2,4,6,8-Tetramethylcyclotetrasiloxane

≥98.5%, ≥99.999% trace metals basis

• Synonym(s): 1,3,5,7-Cyclotetra(methylsiloxane), 1,3,5,7-Tetramethylcyclotetrasiloxane, TMCTS
• Linear Formula: (HSiCH₃O)₄
• CAS Number: 2370-88-9
• Molecular Weight: 240.51
• Beilstein/REAXYS Number: 1775282
• EC Number: 219-137-4
• MDL number: MFCD00039567
• UNSPSC Code: 12352103
• PubChem Substance ID: 24873664
• NACRES: NA.23

Properties

• Quality Level: 100
• assay: ≥98.5%; ≥99.999% trace metals basis
• form: liquid
• refractive index: n20/D 1.387 (lit.)
• bp: 134 °C (lit.)
• mp: −69 °C (lit.)
• density: 0.986 g/mL at 25 °C (lit.)
• storage temp.: 2-8°C
• SMILES string: C[SiH]1O[SiH](C)O[SiH](C)O[SiH](C)O1
• InChI: 1S/C4H16O4Si4/c1-9-5-10(2)7-12(4)8-11(3)6-9/h9-12H,1-4H3
• InChI key: BQYPERTZJDZBIR-UHFFFAOYSA-N

Description

General description

Atomic number of base material: 14 Silicon

Features and Benefits

Precursor for gate dielectrics in thin-film transistors (TFT), and is a component of photochemically formed SiO_X monolayers on TiO.

Safety Information

• pictograms: GHS02
• signalword: Warning
• hcodes: H226
• Hazard Classifications: Flam. Liq. 3
• Storage Class: 3 - Flammable liquids
• wgk_germany: WGK 3
• flash_point_f: 75.2 °F - closed cup
• flash_point_c: 24 °C - closed cup
• ppe: Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter