Pentacyclo(9.5.1.13,9.15,15.17,13)octasiloxane, 1,3,5,7,9,11,13,15-octaphenyl-
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Basic information
- CAS
5256-79-1- Standard SMILES
c1ccc([Si]23O[Si]4(c5ccccc5)O[Si]5(c6ccccc6)O[Si](c6ccccc6)(O2)O[Si]2(c6ccccc6)O[Si](c6ccccc6)(O3)O[Si](c3ccccc3)(O4)O[Si](c3ccccc3)(O5)O2)cc1- InChIKey
KBXJHRABGYYAFC-UHFFFAOYSA-N- Molecular formula
- C48H40O12Si8
- Average molar mass
- 1,033.5 g/mol
- Monoisotopic mass
- 1,032.06738898
Names & identifiers
- Preferred name
- Pentacyclo(9.5.1.13,9.15,15.17,13)octasiloxane, 1,3,5,7,9,11,13,15-octaphenyl-
- IUPAC
- 1,3,5,7,9,11,13,15-octakis-phenyl-2,4,6,8,10,12,14,16,17,18,19,20-dodecaoxa-1,3,5,7,9,11,13,15-octasilapentacyclo[9.5.1.13,9.15,15.17,13]icosane
- English name
- Octaphenylsilsesquioxane
- Molecular formula
- C48H40O12Si8
- Molecular weight
- 1033.51
Names & synonyms
Pentacyclo(9.5.1.13,9.15,15.17,13)octasiloxane, 1,3,5,7,9,11,13,15-octaphenyl-Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, 1,3,5,7,9,11,13,15-octaphenyl-RefChem:859709Octaphenylsilsesquioxane5256-79-1OctaphenyloctasilsesquioxanePerphenyloctasilsesquioxanePSS-Octaphenyl substituted1,3,5,7,9,11,13,15-Octaphenyl-2,4,6,8,10,12,14,16,17,18,19,20-dodecaoxa-1,3,5,7,9,11,13,15-octasilapentacyclo[9.5.1.13,9.15,15.17,13]icosaneMFCD00308870Phenyl-POSSPentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, octaphenyl-
Show more names
-POSSDK802DKSI194Hydrogen-POSSJACS-5256-79-1Aminophenyl-POSSNitrophenyl-POSS
AKOS0159034881,3,5,7,9,11,13,15-octakis-phenyl-2,4,6,8,10,12,14,16,17,18,19,20-dodecaoxa-1,3,5,7,9,11,13,15-octasilapentacyclo[9.5.1.13,9.15,15.17,13]icosaneO03491,3,5,7,9,11,13,15-octaphenylpentacyclo[9.5.1.1(3,9).1(5,15).1(7,13)]octasiloxaneOctaphenyl-T8-silsesquioxane1,3,5,7,9,11,13,15-octaphenyl-2,4,6,8,10,12,14,16,17,18,19,20-dodecaoxa-1,3,5,7,9,11,13,15-octasilapentacyclo[9.5.1.1(3,9).1(5,15).1(7,13)]icosaneC48H40O12Si8Octaphenyl-POSS
Properties
Computed structural propertiesFilling in
- Topological polar surface area
- 111 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 12
- Rotatable bonds
- 8
- Heavy atoms
- 68
- Formal charge
- 0
- Complexity
- 1,270
Physicochemical properties
- Melting point
- 350 °C · >350 °C (lit.)
- Density
- 1.3 g/cm3 · 1.30 g/cm3
- refractive index
- 1.61 · 1.61
- storage temp.
- Inert atmosphere,Room Temperature
- form
- powder to crystal
- color
- White to Almost white
- Specific Gravity
- 1.35 · 1.35
- Hydrolytic Sensitivity
- 1 · 1: no significant reaction with aqueous systems
- InChIKey
- KBXJHRABGYYAFC-UHFFFAOYSA-N
- SMILES
- O1[Si]2(O[Si]3(O[Si]4(O[Si]1(O[Si]5(O[Si](O2)(O[Si](O3)(O[Si](O4)(O5)c6ccccc6)c7ccccc7)c8ccccc8)c9ccccc9)c%10ccccc%10)c%11ccccc%11)c%12ccccc%12)c%13ccccc%13
- CAS DataBase Reference
- 5256 · 5256-79-1
- NIST Chemistry Reference
- Silsesquioxane, phenyl-, cubical octamer(5256-79-1)
- EPA Substance Registry System
- 9.5 · Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, 1,3,5,7,9,11,13,15-octaphenyl- (5256-79-1)
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
Hazard information
Regulatory InformationPMN - indicates a commenced PMN (Pre-Manufacture Notices) substance.
Safety data
- PPE
- Eyeshields, Gloves, type N95 (US)
- wgk
- 3
- tsca
- TSCA listed
- hs_code
- 29319000
- Signal word
- Warning
- Symbol(GHS)
- GHS07
- Storage Class
- 11 - Combustible Solids
- Hazard statements
- H302-H315-H319-H332-H335
- Precautionary statements
- P261-P280-P305+P351+P338
Chemistry & industry
Uses & manufacturing
General Manufacturing InformationPentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, 1,3,5,7,9,11,13,15-octaphenyl-: ACTIVE
Applications
UsesOctaphenylsilsequioxane (CAS# 5256-79-1) is a polyhedral oligomeric silsesquioxane (POSS). Octaphenylsilsequioxane has been used in the preparation of flame-retardant and radiation-resistant materials.
Related reactions
0 records
No reaction records under the current filter.
Compound notes
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