Octaphenylsilsesquioxane
Synonym(s):1,3,5,7,9,11,13,15-Octaphenylpentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane;Octaphenyl-POSS;Octaphenylsilsesquioxane
- CAS NO.：5256-79-1
- Empirical Formula: C48H40O12Si8
- Molecular Weight: 1033.51
- MDL number: MFCD00308870
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-01-27 09:38:02
What is Octaphenylsilsesquioxane?
The Uses of Octaphenylsilsesquioxane
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.
Properties of Octaphenylsilsesquioxane
| 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 |
| 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) |
Safety information for Octaphenylsilsesquioxane
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H332:Acute toxicity,inhalation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Octaphenylsilsesquioxane
| InChIKey | KBXJHRABGYYAFC-UHFFFAOYSA-N |
Octaphenylsilsesquioxane manufacturer
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