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| | PENTAMETHYLDISILOXANE Basic information |
| | PENTAMETHYLDISILOXANE Chemical Properties |
| Boiling point | 86 °C (lit.) | | density | 0.760 g/mL at 20 °C (lit.) | | refractive index | n20/D 1.373 | | Fp | -9°C | | form | clear liquid | | color | Colorless to Almost colorless | | Specific Gravity | 0.758 | | Water Solubility | Not miscible or difficult to mix in water. | | Sensitive | Moisture Sensitive | | Hydrolytic Sensitivity | 3: reacts with aqueous base | | BRN | 1734568 | | InChI | InChI=1S/C5H16OSi2/c1-7(2)6-8(3,4)5/h7H,1-5H3 | | InChIKey | AOJHDNSYXUZCCE-UHFFFAOYSA-N | | SMILES | [Si](C)(C)(C)O[SiH](C)C | | EPA Substance Registry System | Disiloxane, pentamethyl- (1438-82-0) |
| Hazard Codes | F | | Risk Statements | 11 | | Safety Statements | 16-23-24/25 | | RIDADR | UN 1993 3/PG 2 | | WGK Germany | 3 | | F | 10-21 | | TSCA | Yes | | HazardClass | 3 | | PackingGroup | II | | HS Code | 29319090 |
| | PENTAMETHYLDISILOXANE Usage And Synthesis |
| Uses | Pentamethyldisiloxane, is an organosilicon compound used in synthesis of siloxane-polyether copolymer surfactants. Pentamethyldisiloxane can also be used as source of the trimethylsilyl functional group in organic synthesis. | | Uses | Pentamethyldisiloxane is used in the synthesis of siloxane-polyether copolymer surfactants. It is also used as source of trimethylsilyl functional group in organic synthesis. | | Synthesis | 
Take prepared potassium trimethylsilanolate 1.12kg in 2L of anhydrous tetrahydrofuran, was added dropwise with stirring dimethylchlorosilane1kg, dropwise, room temperature reaction 1h, filtered, concentrated, extracted with ether, dried and concentrated to give a high purity of 98% or more of pentamethyl disiloxane 1.2kg. |
| | PENTAMETHYLDISILOXANE Preparation Products And Raw materials |
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