
Hydrogen Terminated Silicone Oil
Chemical Name: | Hydrogen Terminated Silicone Oil |
Product Category: | Silicone Fluids– Products |
Structural Formula: | ![]() |
CAS No.: | 70900-21-9 |
Molecular Formula: | C6H20O2Si3 |
Molecular Weight: | 208.4783 |
Hydrogen Terminated Silicone Oil Description
Hydroxy Terminated Silicone Oil (CAS 70900-21-9), also known as Hydroxy Terminated Polydimethylsiloxane, is a key intermediate for hydrosilylation reactions. This silicone oil is widely used in the production of linear modified silicone fluids with terminal hydrogen reactivity and plays a crucial role in block copolymerization reactions. It is essential for various industries requiring high-performance silicone materials.
Product Type | Si-H Content | Viscosity (25℃)/(mm2/s) | Volatile Substances (150℃,1.5h) |
HS-HT65 | 1.50-1.80% | 55-75 | ≤3.0% |
HS-HT120 | 0.90-1.10% | 105-135 | |
HS-HT200 | 0.60-0.80% | 180-220 | |
HS-HT280 | 0.50-0.60% | 250-310 | |
HS-HT460 | 0.40-0.50% | 410-510 |
Density | 0.971g/mL at 25°C |
Boiling Point | 230°C(lit.) |
Flash Point | 215°F |
Refractive index | n20/D 1.406 |
Storage Conditions | Room Temperature |
Specific gravity | 0.90 |
Appearance | Colorless transparent without visible impurities |
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Hydrogen Terminated Silicone Oil: Guide
Hydroxy Terminated Silicone Oil (CAS 70900-21-9), also known as Hydroxy Terminated Polydimethylsiloxane, is produced by reacting tetramethyldisiloxane with octamethylcyclotetrasiloxane (D4) using sulfuric acid or other acidic catalysts. The molecular weight and hydrogen content vary based on the capping agent to D4 ratio. This silicone oil contains active Si-H bonds at both ends of the molecule, giving it high reactivity. It is a non-toxic, odorless, transparent liquid commonly used as a key reactive intermediate in silicone-based applications.