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Octaphenylsilsesquioxane

Product Name
Octaphenylsilsesquioxane
CAS No.
5256-79-1
Chemical Name
Octaphenylsilsesquioxane
Synonyms
-POSS;DK802;Phenyl-POSS;Hydrogen-POSS;JACS-5256-79-1;Octaphenyl-POSS;Nitrophenyl-POSS;Aminophenyl-POSS;Octaphenylsilsequioxane;OCTAPHENYLSILSESQUIOXANE
CBNumber
CB0106036
Molecular Formula
C48H40O12Si8
Formula Weight
1033.51
MOL File
5256-79-1.mol
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Octaphenylsilsesquioxane Property

Melting point:
>350 °C (lit.)
Density 
1.30 g/cm3
refractive index 
1.61
storage temp. 
Inert atmosphere,Room Temperature
form 
powder to crystal
color 
White to Almost white
Specific Gravity
1.35
Hydrolytic Sensitivity
1: no significant reaction with aqueous systems
InChIKey
KBXJHRABGYYAFC-UHFFFAOYSA-N
CAS DataBase Reference
5256-79-1
NIST Chemistry Reference
Silsesquioxane, phenyl-, cubical octamer(5256-79-1)
EPA Substance Registry System
Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, 1,3,5,7,9,11,13,15-octaphenyl- (5256-79-1)
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Safety

WGK Germany 
3
TSCA 
No
HS Code 
29319000
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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

H332Harmful if inhaled

H335May cause respiratory irritation

Precautionary statements

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

P280Wear protective gloves/protective clothing/eye protection/face protection.

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
526851
Product name
PSS-Octaphenyl substituted
Packaging
5g
Price
$70.9
Updated
2023/06/20
Sigma-Aldrich
Product number
526851
Product name
PSS-Octaphenyl substituted
Packaging
25g
Price
$228
Updated
2023/06/20
TCI Chemical
Product number
O0349
Product name
Octaphenyloctasilsesquioxane
Packaging
5g
Price
$216
Updated
2023/06/20
TCI Chemical
Product number
O0349
Product name
Octaphenyloctasilsesquioxane
Packaging
25g
Price
$861
Updated
2023/06/20
TRC
Product number
O148548
Product name
Octaphenylsilsequioxane
Packaging
100mg
Price
$60
Updated
2021/12/16
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Octaphenylsilsesquioxane Chemical Properties,Usage,Production

Uses

Octaphenylsilsequioxane (CAS# 5256-79-1) is a polyhedral oligomeric silsesquioxane (POSS). Octaphenylsilsequioxane has been used in the preparation of flame-retardant and radiation-resistant materials.

Octaphenylsilsesquioxane Preparation Products And Raw materials

Raw materials

Preparation Products

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Octaphenylsilsesquioxane Suppliers

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5256-79-1, OctaphenylsilsesquioxaneRelated Search:

Heptamethyldisilazane Hexamethyldisilazane Sodium bis(trimethylsilyl)amide Oxalic acid dihydrate 2,4,6,8-Tetramethylcyclotetrasiloxane OCTA(AMINOPHENYL)-T8-SILESQUIOXANE Octamethylsilsesquioxane Octaphenylsilsesquioxane

  • OCTAPHENYLSILSESQUIOXANE
  • OCTAPHENYL-T8-SILSESQUIOXANE
  • 1,3,5,7,9,11,13,15-OCTAPHENYLPENTACYCLO[9.5.1.13,9.15,15.17,13]OCTASILOXANE
  • Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, octaphenyl-
  • Perphenyloctasilsesquioxane
  • 1,3,5,7,9,11,13,15-OCTAPHENYLPENTACYCLO-OCTASILOXANE
  • pss-octaphenyl substituted
  • Octaphenyl-POSS(R), Octaphenylsilsesquioxane, 1,3,5,7,9,11,13,15-Octaphenylpentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane
  • Octaphenyloctasilsesquioxane
  • Hydrogen-POSS
  • Phenyl-POSS
  • Nitrophenyl-POSS
  • Aminophenyl-POSS
  • PSS-Octaphenyl substituted,1,3,5,7,9,11,13,15-Octaphenylpentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, Octaphenyl-POSS, Octaphenylsilsesquioxane
  • OCTAPHENYL-T8-SILSESQUIOXAN
  • Octaphenylsilsesquioxane (Octaphenyl substituted-PSS)
  • Octaphenyl-POSS
  • JACS-5256-79-1
  • 1,3,5,7,9,11,13,15-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]icosane
  • Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, 1,3,5,7,9,11,13,15-octaphenyl-
  • Octaphenylsilsesquioxane（POSS）
  • -POSS
  • Octaphenylsilsequioxane
  • DK802
  • 5256-79-1
  • C48H40O12Si8