4. Refractive index (25 ℃): 1.390~1.410
5. Hydrogen content (%, m/m) ≥: 1.55
They are explained as follows:
Appearance: the external form of silicone oil, usually colorless or yellowish transparent liquid. When we introduced the identification of genuine silicone oil and fake silicone oil, we mentioned that low-quality silicone oil is usually turbid. The color of silicone oil is a very important standard to identify the quality of silicone oil.
Hydrogen content: the biggest difference between methyl hydrogen silicone oil and other silicone oils. As soon as you are familiar with methyl silicone oil, you can see that it is the size of N in the molecular structure that determines the hydrogen content, because the end groups of general methyl silicone oil are the same.
Kinematic viscosity: we mentioned when we introduced the two silicone oils. Kinematic viscosity refers to the ratio of dynamic viscosity and density of liquid at the same temperature.
Specific gravity: The ratio of the volume to density of a substance.
Refractive index: refractive index can be used as a standard to measure the purity of liquid, and can be used to determine the composition of liquid
Acid value: an indicator to measure the pH of the product. The pH value of silicone oil products indicated by the above parameters is generally between 6 and 8.