T9068230
Hexamethyldisiloxane , >98.0%(GC) , 107-46-0
Synonym(s):
2,2,4,4-Tetramethyl-3-oxa-2,4-disilapentane, HMDSO;Hexamethyldisiloxane;HMDSO;Poly(dimethylsiloxane)
CAS NO.：107-46-0
Empirical Formula: C6H18OSi2
Molecular Weight: 162.38
MDL number: MFCD00008265
EINECS: 203-492-7
Update time: 2022-07-08
PRODUCT 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 |
| Hydrolytic Sensitivity | 1: no significant reaction with aqueous systems |
| BRN | 1736258 |
| Dielectric constant | 2.2（20℃） |
| Stability: | Stable, but moisture sensitive. Highly flammable. Incompatible with strong acids, strong bases, oxidizing agents. |
| InChIKey | UQEAIHBTYFGYIE-UHFFFAOYSA-N |
| 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) |
Description and Uses
The most popular precursor chemical is hexamethyldisiloxane (HMDS) which with the addition of helium and oxygen will produce a silica coating. it is used in a variety of consumer applications and can be used as intermediates in the production of silicone polymers.
Safety
| Symbol(GHS) |   GHS02,GHS09 |
| Signal word | Danger |
| Hazard statements | H225-H410 |
| Precautionary statements | P210-P273 |
| 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 | Yes |
| HazardClass | 3 |
| PackingGroup | II |
| HS Code | 29310095 |
| Hazardous Substances Data | 107-46-0(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: > 12160 mg/kg LD50 dermal Rat > 2000 mg/kg |
| Limited Quantities | 1.0 L (0.3 gallon) (liquid) |
| Excepted Quantities | Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml) |
