Hexadecamethylcyclooctasiloxane
Basic information
- CAS
556-68-3- Standard SMILES
C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1- InChIKey
XKJMJYZFAWYREL-UHFFFAOYSA-N- Molecular formula
- C16H48O8Si8
- Average molar mass
- 593.2 g/mol
- Monoisotopic mass
- 592.15033076
Overview
Hexadecamethylcyclooctasiloxane is a macrocyclic organosiloxane composed from eight repeating Me2SiO units. It is an organosiloxane and a macrocycle.
Names & identifiers
- Preferred name
- Hexadecamethylcyclooctasiloxane
- IUPAC
- 2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16-hexadecamethyl-1,3,5,7,9,11,13,15-octaoxa-2,4,6,8,10,12,14,16-octasilacyclohexadecane
- English name
- hexadecamethylcyclooctasiloxane
- Molecular formula
- C16H48O8Si8
- Molecular weight
- 593.23
Names & synonyms
HEXADECAMETHYLCYCLOOCTASILOXANE556-68-3Cyclooctasiloxane, hexadecamethyl-UNII-2YAW49T07JHexadecamethyl-cyclooctasioxane2YAW49T07JCYCLOMETHICONE 8EINECS 209-137-2DTXSID0060305CHEBI:87984CYCLOOCTASILOXANE, 2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16-HEXADECAMETHYL-RefChem:145943
Show more names
Cyclooctasiloxane,2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16-hexadecamethyl-Simethicone Impurity 182,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16-Hexadecamethylcyclohexadecaneoctasiloxane1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15-hexadecamethyl-2,4,6,8,10,12,14,16-octaoxa-1,3,5,7,9,11,13,15-octasilacyclohexadecane
DTXCID7041916209-137-2XKJMJYZFAWYREL-UHFFFAOYSA-NMFCD307257592,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16-hexadecamethyl-1,3,5,7,9,11,13,15-octaoxa-2,4,6,8,10,12,14,16-octasilacyclohexadecanehexadecamethyl-cyclooctasiloxaneC16H48O8Si82,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16-Hexadecamethyl-1,3,5,7,9,11,13,15-octaoxa-2,4,6,8,10,12,14,16-octasilacyclohexadecane;
Properties
Computed structural properties
- Topological polar surface area
- 73.8 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 8
- Rotatable bonds
- 0
- Heavy atoms
- 32
- Formal charge
- 0
- Complexity
- 450
Experimental & physicochemical properties
SpringerMaterials PropertiesBoiling point
Physicochemical properties
- Melting point
- 31.5 °C · 31.5°C
- Boiling point
- 168 °C/20mmHg · 168°C/20mmHg(lit.)
- Density
- 1.177 · 1.1770
- refractive index
- 1.406 · 1.4060
- storage temp.
- Refrigerator
- solubility
- Benzene, Chloroform (Slightly)
- form
- solid
- color
- Colourless to Off-White Oil
- FDA UNII
- 2 YAW49T07J · 2YAW49T07J
- EPA Substance Registry System
- Cyclooctasiloxane, hexadecamethyl- (556-68-3)
- Symbol(GHS)
- 5 · GHS05
- Signal word
- Warning
- Hazard statements
- 320 · H320
- Precautionary statements
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
GHS classification
GHS Classification
This chemical does not meet GHS hazard criteria for 92.9% (13 of 14) of all reports.
Not Classified
Aggregated GHS information provided per 14 reports by companies from 2 notifications to the ECHA C&L Inventory.
Hazard information
Hazard Classes and CategoriesNot Classified
Safety data
- hs_code
- 2931.90.9010
- Signal word
- Warning
- Symbol(GHS)
- GHS05
- Hazard statements
- H320
- Precautionary statements
- P264-P337+P313-P305+P351+P338
Chemistry & industry
Applications
UsesHexadecamethylcyclooctasiloxane is a major component of the crude extract of Bacillus cereus S1 that exhibits antibacterial activity against five bacterial pathogens.
Upstream & downstream products
Downstream products
Additional notes
DefinitionChEBI: A macrocyclic organosiloxane composed from eight repeating Me2SiO units.
Related reactions
0 records
No reaction records under the current filter.
Compound notes
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