Octamethylsilsesquioxane
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- $5 - $480
- Product name: Octamethylsilsesquioxane
- CAS: 17865-85-9
- MF: C8H24O12Si8
- MW: 536.95
- EINECS:
- MDL Number:MFCD02683561
- Synonyms:Pentacyclo[9.5.1.1(3,9).1(5,15).1(7,13)]octasiloxane, octamethyl-;Permethyloctasilsesquioxane;1,3,5,7,9,11,13,15-OCTAMETHYLPENTACYCLO-;Octamethylsilsesquioxane, 1,3,5,7,9,11,13,15-Octamethylpentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane;Octamethyloctasiloxane;Octamethylsilsesquioxane;Octamethyl-POSS;PSS-OCTAMETHYL SUBSTITUTED
14 prices
Selected condition:
Brand
- aablocks
- Ambeed
- American Custom Chemicals Corporation
- Crysdot
- Sigma-Aldrich
Package
- 250mg
- 1g
- 5g
- 25g
- 100g
- Manufactureraablocks
- Product numberAA00264S
- Product descriptionOctamethyl-POSS 95%
- Packaging1g
- Price$18
- Updated2026-05-28
- Buy
- Manufactureraablocks
- Product numberAA00264S
- Product descriptionOctamethyl-POSS 95%
- Packaging5g
- Price$34
- Updated2026-05-28
- Buy
- Manufactureraablocks
- Product numberAA00264S
- Product descriptionOctamethyl-POSS 95%
- Packaging25g
- Price$113
- Updated2026-05-28
- Buy
- Manufactureraablocks
- Product numberAA00264S
- Product descriptionOctamethyl-POSS 95%
- Packaging100g
- Price$363
- Updated2026-05-28
- Buy
- ManufacturerAmbeed
- Product numberA632306
- Product descriptionOctamethyl-POSS 98+%
- Packaging25g
- Price$95
- Updated2021-12-16
- Buy
- ManufacturerAmbeed
- Product numberA632306
- Product descriptionOctamethyl-POSS 98+%
- Packaging100g
- Price$310
- Updated2021-12-16
- Buy
- ManufacturerAmbeed
- Product numberA632306
- Product descriptionOctamethyl-POSS 98+%
- Packaging5g
- Price$24
- Updated2021-12-16
- Buy
- ManufacturerAmbeed
- Product numberA632306
- Product descriptionOctamethyl-POSS 98+%
- Packaging250mg
- Price$5
- Updated2021-12-16
- Buy
- ManufacturerAmbeed
- Product numberA632306
- Product descriptionOctamethyl-POSS 98+%
- Packaging1g
- Price$8
- Updated2021-12-16
- Buy
- ManufacturerAmerican Custom Chemicals Corporation
- Product numberORS0003199
- Product descriptionOCTAMETHYLSILSESQUIOXANE 95.00%
- Packaging5G
- Price$175.35
- Updated2021-12-16
- Buy
- ManufacturerCrysdot
- Product numberCD42001126
- Product descriptionOctamethyl-POSS 95+%
- Packaging100g
- Price$480
- Updated2026-05-27
- Buy
- ManufacturerCrysdot
- Product numberCD42001126
- Product descriptionOctamethyl-POSS 95+%
- Packaging25g
- Price$142
- Updated2026-05-27
- Buy
- ManufacturerSigma-Aldrich
- Product number526835
- Product descriptionPSS-Octamethyl substituted
- Packaging5g
- Price$84.2
- Updated2026-04-30
- Buy
- ManufacturerSigma-Aldrich
- Product number526835
- Product descriptionPSS-Octamethyl substituted
- Packaging25g
- Price$289
- Updated2026-04-30
- Buy
| Manufacturer | Product number | Product description | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|
| aablocks | AA00264S | Octamethyl-POSS 95% | 1g | $18 | 2026-05-28 | Buy |
| aablocks | AA00264S | Octamethyl-POSS 95% | 5g | $34 | 2026-05-28 | Buy |
| aablocks | AA00264S | Octamethyl-POSS 95% | 25g | $113 | 2026-05-28 | Buy |
| aablocks | AA00264S | Octamethyl-POSS 95% | 100g | $363 | 2026-05-28 | Buy |
| Ambeed | A632306 | Octamethyl-POSS 98+% | 25g | $95 | 2021-12-16 | Buy |
| Ambeed | A632306 | Octamethyl-POSS 98+% | 100g | $310 | 2021-12-16 | Buy |
| Ambeed | A632306 | Octamethyl-POSS 98+% | 5g | $24 | 2021-12-16 | Buy |
| Ambeed | A632306 | Octamethyl-POSS 98+% | 250mg | $5 | 2021-12-16 | Buy |
| Ambeed | A632306 | Octamethyl-POSS 98+% | 1g | $8 | 2021-12-16 | Buy |
| American Custom Chemicals Corporation | ORS0003199 | OCTAMETHYLSILSESQUIOXANE 95.00% | 5G | $175.35 | 2021-12-16 | Buy |
| Crysdot | CD42001126 | Octamethyl-POSS 95+% | 100g | $480 | 2026-05-27 | Buy |
| Crysdot | CD42001126 | Octamethyl-POSS 95+% | 25g | $142 | 2026-05-27 | Buy |
| Sigma-Aldrich | 526835 | PSS-Octamethyl substituted | 5g | $84.2 | 2026-04-30 | Buy |
| Sigma-Aldrich | 526835 | PSS-Octamethyl substituted | 25g | $289 | 2026-04-30 | Buy |
Properties
Melting point :>350 °C (lit.)
Boiling point :235.0±23.0 °C(Predicted)
Density :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 :Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, 1,3,5,7,9,11,13,15-octamethyl- (17865-85-9)
Boiling point :235.0±23.0 °C(Predicted)
Density :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 :Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, 1,3,5,7,9,11,13,15-octamethyl- (17865-85-9)
Safety Information
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Description
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Suppliers and manufacturers
Beijing HwrkChemical Technology Co., Ltd
Tianjin heowns Biochemical Technology Co., Ltd.
The future of Shanghai Industrial Co., Ltd.
Shanghai MOF Chemical Tech Limited
Shanghai Gileader Advanced Material Technology Co.,Ltd
Chengdu HuaXia Chemical Reagent Co. Ltd
Shanghai Boka-chem Tech. Inc.
Sigma-Aldrich
Shanghai Enchem Industry Co., Ltd.
Shanghai Zhuang Ming New Material Technology Co., Ltd.




