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Octamethylsilsesquioxane

Product Name
Octamethylsilsesquioxane
CAS No.
17865-85-9
Chemical Name
Octamethylsilsesquioxane
Synonyms
substituted;PSS-OctamethyL;Octamethyl-POSS;JACS-17865-85-9;Octamethyloctasiloxane;Octamethylsilsesquioxane;PSS-OCTAMETHYL SUBSTITUTED;Permethyloctasilsesquioxane;1,3,5,7,9,11,13,15-OCTAMETHYLPENTACYCLO-;High purity CAS 17865-85-9 Octamethylsilsesquioxane in stock
CBNumber
CB6500269
Molecular Formula
C8H24O12Si8
Formula Weight
536.95
MOL File
17865-85-9.mol
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Octamethylsilsesquioxane Property

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)
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Safety

WGK Germany 
3
TSCA 
TSCA listed
HS Code 
29349990
Storage Class
11 - Combustible Solids
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
526835
Product name
PSS-Octamethyl substituted
Packaging
5g
Price
$84.2
Updated
2026/03/19
Sigma-Aldrich
Product number
526835
Product name
PSS-Octamethyl substituted
Packaging
25g
Price
$289
Updated
2026/03/19
American Custom Chemicals Corporation
Product number
ORS0003199
Product name
OCTAMETHYLSILSESQUIOXANE
Purity
95.00%
Packaging
5G
Price
$175.35
Updated
2021/12/16
Ambeed
Product number
A632306
Product name
Octamethyl-POSS
Purity
98+%
Packaging
100g
Price
$310
Updated
2021/12/16
Crysdot
Product number
CD42001126
Product name
Octamethyl-POSS
Purity
95+%
Packaging
100g
Price
$480
Updated
2021/12/16

Octamethylsilsesquioxane Preparation Products And Raw materials

Raw materials

Preparation Products

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Octamethylsilsesquioxane Suppliers

China 83 India 3 Switzerland 1 United Kingdom 1 United States 7 Global 95
Beijing HwrkChemical Technology Co., Ltd
Tel
89508211 18501085097
Fax
010-89508210
Email
sales.bj@hwrkchemical.com
Country
China
ProdList
9416
Advantage
55
Tianjin heowns Biochemical Technology Co., Ltd.
Tel
400 638 7771
Email
sales@heowns.com
Country
China
ProdList
14435
Advantage
57
The future of Shanghai Industrial Co., Ltd.
Tel
021-61552785
Fax
021-55660885
Email
sales@shshiji.com
Country
China
ProdList
9546
Advantage
55
Shanghai MOF Chemical Tech Limited
Tel
13661494087 18964793018
Fax
86-021-51821718 QQ：2427604606
Email
sales@mof-chemicals.com
Country
China
ProdList
293
Advantage
55
Shanghai Gileader Advanced Material Technology Co.,Ltd
Tel
18516111942
Email
823898732@qq.com
Country
China
ProdList
1316
Advantage
56
Chengdu HuaXia Chemical Reagent Co. Ltd
Tel
400-1166-196 13458535857
Fax
QQ：800101999
Email
cdhxsj@163.com
Country
China
ProdList
13350
Advantage
58
Shanghai Boka-chem Tech. Inc.
Tel
400-026-1533/(021) 6478-0600
Fax
+86 (21) 6459-2060
Email
sales@bokachem.com
Country
China
ProdList
876
Advantage
58
Sigma-Aldrich
Tel
021-61415566 800-8193336
Email
orderCN@merckgroup.com
Country
China
ProdList
51395
Advantage
80
Shanghai Enchem Industry Co., Ltd.
Tel
15021317485
Fax
021-58109752
Country
China
ProdList
1403
Advantage
58
Shanghai Zhuang Ming New Material Technology Co., Ltd.
Tel
17312398916 051386936896 15216715905
Fax
051386936896
Email
sales@zhuangming.net
Country
China
ProdList
1271
Advantage
58
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View Lastest Price from Octamethylsilsesquioxane manufacturers

Career Henan Chemical Co
Product
Octamethylsilsesquioxane 17865-85-9
Price
US $1.00/g
Min. Order
100g
Purity
99%
Supply Ability
G/KG/T
Release date
2019-12-20

17865-85-9, OctamethylsilsesquioxaneRelated Search:

Hexamethyldisilazane N-Methyl-2-pyrrolidone Heptamethyldisilazane N,N-Dimethyldodecylamine Octavinyloctasilasesquioxane Octaphenylsilsesquioxane Oktakis(tetramethylammonium)-T8-silisesquioxane METHYL-2-PYRROLIDONE PSS-VINYL-HEPTAISOBUTYL SUBSTITUTED PSS-(1-PROPYLMETHACRYLATE)-HEPTAISOBUTY& Octamethylsilsesquioxane 1-[3-(2-AMINOETHYL)AMINO]PROPYL-3,5,7,9,11,13,15-ISOBUTYLPENTACYCLO[9.5.1.1(3,9).1(5,15).1(7.13)]OCTASILOXANE 1-(4-CHLOROBENZYL)-3,5,7,9,11,13,15-HEPTACYCLOPENTYLPENTACYCLO[9.5.1.1(3,9).1(5,15).1(7,13)]OCTASILOXANE 1-CHLOROPROPYL-3,5,7,9,11,13,15-ISOBUTYLPENTACYCLO-[9.5.1.1(3,9).1(5,15).1(7,13)]OCTASILOXANE 1-(3-MERCAPTO)PROPYL-3,5,7,9,11,13,15-ISOBUTYLPENTACYCLO-9.5.1.1(3,9).1(5,15).1(7,13)OCTASILOXANE EPOXYPROPYLHEPTAISOBUTYL-T8-SILSESQUIOXANE 1-[2-(3,4-EPOXYCYCLOHEXYL)ETHYL]-3,5,7,9,11,13,15-HEPTACYCLOPENTYLPENTACYCLO[9.5.1.13,9.15,15.17,13]OCTASILOXANE 1-ALLYL-3,5,7,9,11,13,15-HEPTAISOBUTYLPENTACYCLO[9.5.1.1.(3,9).1(5,15).1(7,13)]OCTASILOXANE

  • 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
  • Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, 1,3,5,7,9,11,13,15-octamethyl-
  • PSS-OCTAMETHYL SUBSTITUTED
  • JACS-17865-85-9
  • PSS-OctamethyL
  • substituted
  • High purity CAS 17865-85-9 Octamethylsilsesquioxane in stock
  • 17865-85-9
  • 7865-85-9
  • C8H24O12Si8