1,7-Dichlorooctamethyltetrasiloxane
Basic information
- CAS
2474-02-4- Standard SMILES
C[Si](C)(Cl)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)Cl- InChIKey
UHRAUGIQJXURFE-UHFFFAOYSA-N- Molecular formula
- C8H24Cl2O3Si4
- Average molar mass
- 351.52 g/mol
- Monoisotopic mass
- 350.0179561
Names & identifiers
- Preferred name
- 1,7-Dichlorooctamethyltetrasiloxane
- IUPAC
- chloro-[[[chloro(dimethyl)silyl]oxy-dimethylsilyl]oxy-dimethylsilyl]oxy-dimethylsilane
- English name
- 1,7-Dichlorooctamethyltetrasiloxane
- Molecular formula
- C8H24Cl2O3Si4
- Molecular weight
- 351.52
Names & synonyms
1,7-Dichlorooctamethyltetrasiloxane2474-02-41,7-Dichloro-1,1,3,3,5,5,7,7-octamethyltetrasiloxane1,7-Dichloro-octamethyltetrasiloxaneTetrasiloxane, 1,7-dichloro-1,1,3,3,5,5,7,7-octamethyl-MFCD00045148chloro-[[[chloro(dimethyl)silyl]oxy-dimethylsilyl]oxy-dimethylsilyl]oxy-dimethylsilaneC8H24Cl2O3Si4SCHEMBL523534DTXSID3062449EINECS 219-597-6AKOS015913482
Show more names
DKFELEX0293Dichloro-siloxane1,3-dichlorooctamethyltetrasiloxane1,7-Dichloro-octamethyltetrasiloxane 95%1,7-Dichlorooctamethylheptanetetrasiloxane1,7-dichloro-1,1,3,3,5,5,7,7-octamethyl-tetrasiloxanOxybis[(dimethylsilylene)oxy]bis(chlorodimethylsilane)
BS-43953SY0636361,7-Dichloro-octamethyltetrasiloxane, 95%D5267NS00046229D90380S061251,7-dichloro-1,1,3,3,5,5,7,7-octamethyl-tetrasiloxane
Database identifiers
- CAS
2474-02-4- PubChem CID
- 75584
- DTXSID
DTXSID3062449- EC Number
- 219-597-6
- Nikkaji
- J216.112E
Properties
Computed structural properties
- Topological polar surface area
- 27.7 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 3
- Rotatable bonds
- 6
- Heavy atoms
- 17
- Formal charge
- 0
- Complexity
- 245
Experimental & physicochemical properties
Chemical ClassesToxic Gases & Vapors -> Chlorosilanes
SpringerMaterials PropertiesBoiling point
Physical DescriptionClear colorless liquid; [Aldrich MSDS]
Physicochemical properties
- Melting point
- 62 °C · −62 °C(lit.)
- Boiling point
- 222 °C · 222 °C(lit.)
- Density
- 1.011 g/mL · 1.011 g/mL at 25 °C(lit.)
- refractive index
- 20 · n20/D 1.405(lit.)
- Flash point
- 190 °F · 190 °F
- form
- liquid
- Specific Gravity
- 1.011 · 1.011
- color
- Colorless to Almost colorless
- Hydrolytic Sensitivity
- 8 · 8: reacts rapidly with moisture, water, protic solvents
- BRN
- 1784800 · 1784800
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
Danger
H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
P260, P264, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P363, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 157 reports by companies from 3 notifications to the ECHA C&L Inventory.
Hazard information
Regulatory InformationTetrasiloxane, 1,7-dichloro-1,1,3,3,5,5,7,7-octamethyl-: Does not have an individual approval but may be used under an appropriate group standard
Hazards SummaryCauses burns; Inhalation may cause corrosive injuries to upper respiratory tract and lungs; [Aldrich MSDS] See Octamethylcyclotetrasiloxane. See Chlorotrimethylsilane.
Hazard Classes and CategoriesSkin Corr. 1B (100%)
Safety & protection
Exposure Control and Personal Protection
TIH (Toxic Inhalation Hazard) - Term used to describe gases and volatile liquids that are toxic when inhaled. Some are TIH materials themselves, e.g., chlorine, and some release TIH gases when spilled in water, e.g., chlorosilanes. [ERG 2016].
Toxicology
Adverse EffectsDermatotoxin - Skin burns.
Safety data
Chemistry & industry
Uses & manufacturing
UsesToxic Gas from Spilling Chemical in Water [Category: Other]
General Manufacturing InformationTetrasiloxane, 1,7-dichloro-1,1,3,3,5,5,7,7-octamethyl-: ACTIVE
Related reactions
0 records
No reaction records under the current filter.
Compound notes
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