Medical-grade 350 viscosity methyl silicone oil (usually referring to polydimethylsiloxane (PDMS) with a kinematic viscosity of approximately 350 cSt) is widely used in the pharmaceutical and medical fields, primarily due to its excellent biocompatibility, chemical inertness, low surface tension, temperature resistance, and lubricity. The following are typical application scenarios:
Medical Device Lubrication and Coating
Medical catheters and cannulas: Acts as a lubricating coating to reduce friction between the device and tissue, minimizing insertion damage and patient discomfort (e.g., urinary catheters, gastric tubes, vascular catheters, etc.).
Syringe plunger lubrication: Ensures smooth plunger movement and prevents rubber seals from sticking or leaking.
Surgical instrument protection: Coated on the surface of instruments to prevent metal corrosion and tissue adhesion.
Pharmaceutical Excipients
Defoamers: Used to eliminate foam in oral solutions, injections, or fermentation processes (must comply with pharmacopoeial standards such as USP/NF).
Sustained-release formulation carriers: Used to regulate the drug release rate in topical drug delivery systems (e.g., patches, ointments).
Hydrophobic bases: Used as a base component in certain topical formulations (e.g., waterproof ointments, scar gels).
Personal Care and Medical Products
Skin Protectants: Used in pressure ulcer prevention or wound care dressings to reduce friction and moisture accumulation.
Scar Repair Products: As the primary component of silicone gel, it improves scar hyperplasia (such as keloids).
Skin Care Product Additives: Provides a silky feel and enhances product spreadability (must meet cosmetic-grade standards).
Other Special Applications
Laboratory Equipment Treatment: Used to protect delicate instruments (such as centrifuge seals) or prevent biological specimens from sticking.
Pharmaceutical Equipment Anti-Stick: Prevents raw materials from adhering to equipment surfaces during the pharmaceutical production process.
Purity Requirements: Pharmaceutical-grade silicone fluid must comply with the standards of the United States Pharmacopoeia (USP), European Pharmacopoeia (EP), or Chinese Pharmacopoeia (CHP), ensuring the absence of heavy metals and volatile residues.
Sterilization Compatibility: Some applications require resistance to gamma irradiation or autoclave sterilization.
Regulatory Compliance: Biocompatibility testing (such as ISO 10993) and FDA/CE certification are required.
