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CAS No 556-67-2 , 2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane Search by region : China

  • Name: 2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane
  • Synonyms: Cyclic dimethylsiloxane tetramer; octamethyl-; 556-67-2; OMCTS; Oktamethylcyklotetrasiloxan;2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane;Cyclotetrasiloxane; Union carbide 7207;
  • CAS Registry Number:
  • Transport: UN 1993
  • Melting Point: 17-18 ºC
  • Flash Point: 56 ºC
  • Boiling Point: 175-176 ºC
  • Density: 0.956
  • Refractive index: 1.395-1.397
  • Safety Statements: R53;R62
  • Hazard Symbols: Xn: Harmful;
  • Flash Point: 56 ºC
  • EINECS: 209-136-7
  • Molecular Weight: 296.61576
  • InchiKey: HMMGMWAXVFQUOA-UHFFFAOYSA-N
  • InChI: InChI=1S/C8H24O4Si4/c1-13(2)9-14(3,4)11-16(7,8)12-15(5,6)10-13/h1-8H3
  • Risk Statements: S36/37;S46;S51;S61
  • Molecular Formula: C8H24O4Si4
  • Molecular Structure:CAS No:556-67-2 2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane

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References of 2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane
Title: Octamethylcyclotetrasiloxane
CAS Registry Number: 556-67-2
Molecular Formula: C8H24O4Si4
Molecular Weight: 296.62
Percent Composition: C 32.39%, H 8.16%, O 21.58%, Si 37.87%
Literature References: Isolated from the hydrolysis product of dimethyldichlorosilane: Patnode, Wilcock, J. Am. Chem. Soc. 68, 358 (1946).
Properties: Oily liquid. mp 17.5°. bp 175°. bp20 74°. d 0.9558. nD20 1.3968.
Melting point: mp 17.5°
Boiling point: bp 175°; bp20 74°
Index of refraction: nD20 1.3968
Density: d 0.9558
Use: Preparation of methyl silicon oils.