Dimethylsilicone oil (polydimethylsiloxane, abbreviated as PDMS) is a versatile compound that has demonstrated its unique value in various fields. Its outstanding lubricity, excellent thermal stability, superior dielectric properties, good hydrophobicity and anti-adhesion properties make it an indispensable material in both industrial and daily life applications. From sealants for electronic and electrical devices to silicone rubbers for building materials, from efficient lubrication for motors to finishing aids for textiles, and even in the pharmaceutical, healthcare and cosmetics industries, dimethylsilicone oil plays a significant role. 
With the advancement of technology and the increasing demands for the quality of life, the application scope of dimethyl silicone oil has gradually expanded to the food, hygiene and medical industries closely related to human health. This transformation has imposed stricter requirements on the quality of silicone oil, ensuring that it not only has powerful functions but is also safe and harmless. 
In the field of healthcare, the safety of direct human contact with dimethyl silicone oil has attracted much attention. To ensure its safe use, the State Quality Supervision, Inspection and Quarantine Administration of China, based on the GB/T16886 "Biological Evaluation of Medical Devices" standard, conducted strict biological evaluations on medical materials. Among them, in vitro cytotoxicity tests and irritation and delayed-type hypersensitivity reaction tests are the key indicators for assessing the safety of the materials for human use. These tests aim to verify whether the materials will cause cytotoxicity, irritation or allergic reactions when in contact with the human body. 
In this context, a series of medical-grade dimethylsilicone oil products that meet high standards have emerged in the market. These products have undergone strict testing by authoritative national medical testing institutions, proving their safety in applications such as external human skin contact and lubrication of medical devices. They not only possess physical properties such as transparency, high spreadability, breathability, and water resistance, but also offer long-lasting lubrication and excellent penetration spreadability. They have a smooth touch and can moisturize the skin. 
It is particularly worth noting that some medical-grade dimethyl silicone oils have also obtained the food-grade 3H grade certification. This further demonstrates their outstanding performance in terms of safety and non-toxicity. Such products have passed the biocompatibility test reports, ensuring that they will not cause any adverse reactions when in contact with the human body, providing a solid safety guarantee for their wide application in the medical, hygiene, and food industries. 
In conclusion, dimethyl silicone oil, as a multifunctional chemical material, is continuously improving its quality and is gradually meeting the demands of more fields. Especially in the healthcare industry, the strict control of its safety ensures people's health.