Silicone Oil Purchasing Guide: In-depth Analysis of Purity and Viscosity as Two Core Considerations

1. Purity and composition

The purity and composition of silicone oil are the basis for judging its quality. High-purity silicone oil can provide better performance, especially in the cosmetic and medical fields, where purity requirements are more stringent.

Chemical grade: Silicone oil has different grades, including industrial grade, cosmetic grade, food grade and medical grade. When purchasing, you should choose the appropriate silicone oil grade according to the specific application. For example, cosmetic grade silicone oil requires higher purity and usually does not contain harmful substances to ensure safety.

Minimum impurities: The composition of high-quality silicone oil should be as simple as possible, usually composed of high-purity siloxane substances (such as polydimethylsiloxane) with extremely low impurity content. Check the product manual or label to make sure the silicone oil does not contain too many additives or impurities.

2. Viscosity

The viscosity of silicone oil directly affects its performance, so evaluating viscosity is one of the important criteria for distinguishing the quality of silicone oil.

Consistency: The viscosity of silicone oil is usually measured in centistokes (cSt) and there are many different viscosity ranges. The viscosity of high-quality silicone oil should meet the specifications and maintain consistency. If the viscosity is too high or too low, it may affect its lubricity or application effect.

Temperature stability: High-quality silicone oil should maintain stable viscosity over a wide temperature range. The viscosity of silicone oil should not fluctuate drastically with temperature changes, otherwise it may affect its use effect and performance.

3.Thermal stability
The thermal stability of silicone oil is an important physical property of silicone oil, especially when used in high-temperature environments, high-quality silicone oil can maintain its performance unchanged.
Anti-degradation: High-quality silicone oil can maintain a stable chemical structure at high temperatures and is not easy to decompose or deteriorate. Inferior silicone oil may degrade at high temperatures, resulting in performance degradation or the production of harmful substances.
Low volatility: The volatility of silicone oil has an important impact on its heat resistance. High-quality silicone oil has low volatility and will not evaporate in large quantities even when used at high temperatures, thus ensuring its long-term stability and effectiveness.

Silicone oil is widely used in many fields due to its chemical stability, low viscosity, high temperature resistance and hydrophobic properties. Identifying high-quality silicone oil has become the focus. This article introduces it from three aspects: first, purity and composition. Different grades of silicone oil have different application scenarios. High-quality products have fewer impurities and higher purity. Second, viscosity, which affects performance. High-quality silicone oil has compliant viscosity and strong temperature stability. Third, thermal stability. High-quality products resist degradation at high temperatures, have low volatility, and can maintain stable performance.

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