Volatile and Oil-Free Silicones for Formulations

Regarding your questions about volatile, oil-free silicones like Trisiloxane, Cyclotetrasiloxane, and Caprylyl Methicone, and their compatibility with Isododecane:

1. Volatility and Oil-Free Claim

• Trisiloxane: This is a silicone oil known for its very light feel and fast evaporation. It evaporates quickly and is suitable for formulations where a light, non-oily feel is desired, making it suitable for oil-free claims.
• Cyclotetrasiloxane: While we don't have a direct description for Cyclotetrasiloxane, the description for Cyclopentasiloxane indicates that Cyclotetrasiloxane evaporates even faster than Cyclopentasiloxane, which itself evaporates quickly. As a silicone, it is also suitable for oil-free formulations.
• Caprylyl Methicone: This is a modified Trisiloxane designed for broader solubility. It is also described as having very high lightness and evaporating quickly, similar to Trisiloxane. It is suitable for oil-free formulations.

All three silicones are considered volatile and can be used in formulations aiming for an oil-free claim, providing a light, non-greasy feel that evaporates from the skin.

2. Compatibility with Isododecane

• Caprylyl Methicone: The description explicitly states that Caprylyl Methicone can dissolve in all types of hydrocarbons, including Isododecane.
• Trisiloxane: The description mentions Trisiloxane can be dissolved in any silicone and various oils, but suggests Caprylyl Methicone if broader solubility in oils is needed. However, since Isododecane is known to dissolve silicones, Trisiloxane should be miscible with Isododecane.
• Cyclotetrasiloxane: Isododecane is described as being able to dissolve in silicones. Therefore, Cyclotetrasiloxane, being a silicone, should be miscible with Isododecane.

In summary, all three silicones (Trisiloxane, Cyclotetrasiloxane, and Caprylyl Methicone) should be miscible with Isododecane, although Caprylyl Methicone is specifically highlighted for its broad solubility in hydrocarbons like Isododecane.