Hexamethyldisiloxane
ALDRICH/326739 - NMR grade, ≥99.5%
Synonym: HMDSO
CAS Number: 107-46-0
Empirical Formula (Hill Notation): C6H18OSi2
Molecular Weight: 162.38
EC Number: 203-492-7
MDL Number: MFCD00008265
Linear Formula: (CH3)3SiOSi(CH3)3
Product Type: Chemical
| assay | ≥99.5% |
| bp | 101 °C (lit.) |
| density | 0.764 g/mL at 20 °C (lit.) |
| form | liquid |
| InChI | 1S/C6H18OSi2/c1-8(2,3)7-9 |
| InChI key | UQEAIHBTYFGYIE-UHFFFAOYSA |
| mp | −59 °C (lit.) |
| Quality Level | 100 ![]() |
| refractive index | n |
| SMILES string | C[Si](C)(C)O[Si](C)(C)C |
| technique(s) | NMR: suitable |
| vapor density | >1 (vs air) |
| Packaging: | 100 g in glass bottle |
| Symbol | ![]() GHS02,GHS09 |
| Signal word | Danger |
| Hazard statements | H225 - H410 |
| Precautionary statements | P210 - P273 |
| Hazard Codes | F,N |
| Risk Statements | 11-50/53 |
| Safety Statements | 16-61 |
| RIDADR | UN1993 - class 3 - PG 2 - EHS - VP <= 110kPa - Flammable liquids |
| WGK Germany | WGK 2 |
| Flash Point(F) | 21.2 °F - closed cup |
| Flash Point(C) | -6 °C - closed cup |
| Purity | ≥99.5% |
| bp | 101 °C (lit.) |
| mp | −59 °C (lit.) |
| Density | 0.764 g/mL at 20 °C (lit.) |
| Refractive Index | n |
| UNSPSC | 12352103 |



