Octamethylcyclotetrasiloxane CAS #: 556-67-2

Synonyms Octamethyl cyclotetrasiloxane, Dimethylsiloxane Cyclic Tetramer, 2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane, D4, Cyclomethicone 4, Oktamethylcyklotetrasiloxan, [-Si(CH3)2O-]4, CAS 104986-37-0, CAS 83874-62-8

Compound Formula: C8H24O4Si4 Molecular Weight: 296.61 Appearance: Colorless liquid Melting Point: 17-18 °C Boiling Point: 175-176 °C Density: 0.956-0.959 g/mL Solubility in H2O: Insoluble Vapor Density: 1 (vs. air) Exact Mass: 296.075165 g/mol Monoisotopic Mass: 296.075165 g/mol Refractive Index: n20/D 1.395-1.398

Health & Safety Information Signal Word: Warning Hazard Statements: H226-H361-H413 Hazard Codes: F, Xn Precautionary Statements: P281 Flash Point: 51-54 °C Auto-Ignition Temperature: 384-387 °C (1013 hPa) Risk Codes: N/A Safety Statements: N/A Harmonized Tariff Code: 2931.90 RTECS Number: GZ4397000 Transport Information: UN 1993 3/PG III WGK Germany: 3 GHS Pictogram: Image,Image

Chemical Identifiers Linear Formula: [(CH3)2SiO]4 Pubchem CID: 11169 MDL Number: MFCD00003269 EC No.: 209-136-7 IUPAC Name: 2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane Beilstein/Reaxys No.: 1787074 SMILES: C[Si]1(O[Si](O[Si](O[Si](O1)(C)C)(C)C)(C)C)C InchI Identifier: InChI=1S/C8H24O4Si4/c1-13(2)9-14(3,4)11-16(7,8)12-15(5,6)10-13/h1-8H3 InchI Key: HMMGMWAXVFQUOA-UHFFFAOYSA-N