- Eye observation. The good quality silicone oil is made from 100% pure raw material and usually transparent and no smelly.While the low quality silicone oil used the recycled rubber waste and it usually have the pungent smell.
- Test with fire.Use glass rod or iron rod dipped with a small amount of silicone oil to ignite. The white mineral oil can ignite and emit black smoke.While the silicone oil will not burn when ignited with fire. It keeps odorless, clear, transparent and non-toxic. The ignition point of silicone oil common type 350cst to 1000cst is over 320℃
- Freezing point test method.Good quality ofsilicone oil will not freeze at – 50 ℃, while the low quality might be turbid or frozen.
