Basic information
- CAS
17865-85-9- Standard SMILES
C[Si]12O[Si]3(C)O[Si]4(C)O[Si](C)(O1)O[Si]1(C)O[Si](C)(O2)O[Si](C)(O3)O[Si](C)(O4)O1- InChIKey
SOQGBGSEJYZNPS-UHFFFAOYSA-N- Molecular formula
- C8H24O12Si8
- Average molar mass
- 536.95 g/mol
- Monoisotopic mass
- 535.94218847
Names & identifiers
- Preferred name
- Pentacyclo(9.5.1.13,9.15,15.17,13)octasiloxane, 1,3,5,7,9,11,13,15-octamethyl-
- IUPAC
- 1,3,5,7,9,11,13,15-octamethyl-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
- Octamethylsilsesquioxane
- Molecular formula
- C8H24O12Si8
- Molecular weight
- 536.95
Names & synonyms
Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, 1,3,5,7,9,11,13,15-octamethyl-Pentacyclo(9.5.1.13,9.15,15.17,13)octasiloxane, 1,3,5,7,9,11,13,15-octamethyl-RefChem:859708Octamethylsilsesquioxane17865-85-9Octamethyl-POSSPermethyloctasilsesquioxanePSS-Octamethyl substitutedMFCD026835611,3,5,7,9,11,13,15-octamethyl-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]icosanePentacyclo[9.5.1.1(3,9).1(5,15).1(7,13)]octasiloxane, octamethyl-Octa(methylsilsesquioxane)
Show more names
substitutedPSS-OctamethyLJACS-17865-85-9Octamethyloctasiloxane1,3,5,7,9,11,13,15-OCTAMETHYLPENTACYCLO-High purity CAS 17865-85-9 Octamethylsilsesquioxane in stock
C8H24O12Si8Octasilsesquioxane, octamethyl-SCHEMBL2618631SST-3M01DTXSID20893395AKOS015908968BS-21846I10272
Database identifiers
- CAS
17865-85-9- PubChem CID
- 519486
- DTXSID
DTXSID20893395- Nikkaji
- J789.549F
Properties
Computed structural properties
- Topological polar surface area
- 111 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 12
- Rotatable bonds
- 0
- Heavy atoms
- 28
- Formal charge
- 0
- Complexity
- 456
Experimental & physicochemical properties
SpringerMaterials PropertiesBoiling point
Physicochemical properties
- Melting point
- 350 °C · >350 °C (lit.)
- Boiling point
- 235 · 235.0±23.0 °C(Predicted)
- Density
- 1.26 · 1.26±0.1 g/cm3(Predicted)
- storage temp.
- Inert atmosphere,Room Temperature
- InChI
- 1S/C8H24O12Si8/c1-21-9-22(2)12-25(5)14-23(3,10-21)16-27(7)17-24(4,11-21)15-26(6,13-22)19-28(8,18-25)20-27/h1-8H3
- InChIKey
- SOQGBGSEJYZNPS-UHFFFAOYSA-N
- SMILES
- C[Si]12O[Si]3(C)O[Si]4(C)O[Si](C)(O1)O[Si]5(C)O[Si](C)(O2)O[Si](C)(O3)O[Si](C)(O4)O5
- NIST Chemistry Reference
- Octasilsesquioxane, octamethyl-(17865-85-9)
- 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-octamethyl- (17865-85-9)
- UNSPSC Code
- 12162002 · 12162002
- NACRES
- 23 · NA.23
- Symbol(GHS)
- 7 · GHS07
- Signal word
- Warning
- Hazard statements
- 302 · H302-H315-H319-H335
- Precautionary statements
- 261 · P261-P301+P312-P302+P352-P304+P340-P305+P351+P338
- PPE
- 95 · Eyeshields, Gloves, type N95 (US)
- WGK Germany
- 3 · 3
- TSCA
- TSCA listed
- HS Code
- 29349990 · 29349990
- Storage Class
- 11 · 11 - Combustible Solids
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
- 29349990
- Signal word
- Warning
- Symbol(GHS)
- GHS07
- Storage Class
- 11 - Combustible Solids
- Hazard statements
- H302-H315-H319-H335
- Precautionary statements
- P261-P301+P312-P302+P352-P304+P340-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-octamethyl-: ACTIVE
Suppliers74 total
郑州阿尔法化工有限公司+86-18530059196 · [email protected]
湖北永阔科技有限公司027-59223108 15972152991 · [email protected]
上海麦克林生化科技股份有限公司021-50706066 15221275939 · [email protected]
陕西星贝爱科生物科技有限责任公司029-13572876172 13572876172 · [email protected]
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Sigma-Aldrich西格玛奥德里奇(上海)贸易有限公司021-61415566 800-8193336 · [email protected]
Shanghai Enchem Industry Co., Ltd.15021317485
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career henan chemical co+86-0371-86658258 · [email protected]
上海腾骞生物科技有限公司021-50895067 18616507272;13681616114;15020344067 · [email protected]
Related reactions
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Compound notes
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