Hexamethyldisiloxane
- Product NameHexamethyldisiloxane
- CAS107-46-0
- CBNumberCB2446352
- MFC6H18OSi2
- MW162.38
- EINECS203-492-7
- MDL NumberMFCD00008265
- MOL File107-46-0.mol
Chemical Properties
| Melting point: | −59 °C(lit.) |
| Boiling point: | 101 °C(lit.) |
| Density | 0.764 g/mL at 20 °C(lit.) |
| vapor density | >1 (vs air) |
| vapor pressure | 20 hPa (20 °C) |
| refractive index | n |
| Flash point: | 33 °F |
| storage temp. | Store below +30°C. |
| solubility | 0.00037g/l insoluble |
| form | liquid |
| Specific Gravity | 0.76 |
| color | Colorless to Almost colorless |
| explosive limit | 0.5-21.8%(V) |
| Water Solubility | insoluble |
| Specific Heat Capacity | Cp(liquid): 1.92 J/(g·K); Cp(gas): 1.47 J/(g·K), at 25℃ |
| Hydrolytic Sensitivity | 1: no significant reaction with aqueous systems |
| BRN | 1736258 |
| Henry's Law Constant | 1.3×10-6 mol/(m3Pa) at 25℃, Xu and Kropscott (2014) |
| Dielectric constant | 2.2(20℃) |
| Stability: | Stable, but moisture sensitive. Highly flammable. Incompatible with strong acids, strong bases, oxidizing agents. |
| Cosmetics Ingredients Functions | ANTIFOAMING SKIN CONDITIONING - MISCELLANEOUS |
| InChI | 1S/C6H18OSi2/c1-8(2,3)7-9(4,5)6/h1-6H3 |
| InChIKey | UQEAIHBTYFGYIE-UHFFFAOYSA-N |
| SMILES | C[Si](C)(C)O[Si](C)(C)C |
| LogP | 5.06 at 20℃ |
| CAS DataBase Reference | 107-46-0(CAS DataBase Reference) |
| NIST Chemistry Reference | Disiloxane, hexamethyl-(107-46-0) |
| EPA Substance Registry System | Hexamethyldisiloxane (107-46-0) |
Safety
| Symbol(GHS) |
  GHS02,GHS09 |
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| Signal word | Danger | |||||||||
| Hazard statements | H410-H225 | |||||||||
| Precautionary statements | P501-P273-P240-P210-P233-P243-P241-P242-P280-P370+P378-P391-P303+P361+P353-P403+P235 | |||||||||
| PPE | Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter | |||||||||
| Hazard Codes | F,N,T | |||||||||
| Risk Statements | 11-50/53-65-51/53-48/23/24/25-36/38-46-45 | |||||||||
| Safety Statements | 16-61-62-45-26-53 | |||||||||
| RIDADR | UN 1993 3/PG 2 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | JM9237000 | |||||||||
| F | 10 | |||||||||
| Autoignition Temperature | 340 °C | |||||||||
| TSCA | TSCA listed | |||||||||
| HazardClass | 3 | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 29310095 | |||||||||
| Storage Class | 3 - Flammable liquids | |||||||||
| Hazard Classifications |
Aquatic Acute 1 Aquatic Chronic 1 Flam. Liq. 2 |
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| Hazardous Substances Data | 107-46-0(Hazardous Substances Data) | |||||||||
| Toxicity | LD50 orally in Rabbit: > 12160 mg/kg LD50 dermal Rat > 2000 mg/kg | |||||||||
| REACH Registrations | Active | |||||||||
| Limited Quantities | 1.0 L (0.3 gallon) (liquid) | |||||||||
| Excepted Quantities | Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml) | |||||||||
| NFPA 704: |
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