7440-21-3 | Silicone

Chemical type

• Polymer (polysiloxane)

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• Synthetic silicone polymer (polydimethylsiloxane-based)

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Key properties

• Replicates appearance and feel of natural breast tissue
• Heat accumulation leading to discomfort
• Heavy weight causing shoulder pain and fatigue
• Limited personalization

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• Inert and biocompatible substance
• Hyperdense on nonenhanced CT (attenuation of 50-130 Hounsfield units)
• Lower specific gravity than cerebrospinal fluid (CSF), leading to non-dependent positioning in ventricles
• Low surface tension, resulting in spherical or globular appearance
• Hyperintense on T1-weighted MRI, variable intensity on T2-weighted MRI (hyperintense to hypointense), with chemical shift artifacts
• Emulsifies under certain conditions, potentially contributing to migration
• Stable for intraocular use but can migrate under pressure or trauma

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• Material for conventional external breast prostheses (EBPs)
• Replication of natural breast tissue in post-mastectomy prosthetics

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• Intraocular tamponade agent for treatment of retinal detachment
• Provides mechanical support to reattach the retina by filling the vitreous cavity

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Classification by use

• Biomedical polymers for prosthetics
• Materials in breast reconstruction and external prostheses

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• Chemicals used in ophthalmic surgery
• Chemicals used as biocompatible tamponade agents

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A trustworthy factory and manufacturer

Demei Chemical Technology Co., Ltd. is a modern high-tech enterprise integrating R&D, production, and sales. The company's founder, Dr. Arron, born in April 1975, graduated from the School of Mechanical Engineering at Yanshan University and has been engaged in research in the fields of mechanical engineering and chemical synthesis for many years. The company's products focus on the chemical industry, primarily dealing in chemical raw materials and chemical production machinery and equipment. With its strong technical capabilities, advanced production equipment, and strict quality management system, the company has earned the trust of customers worldwide.

1. [Cite:2] Development of Architected Materials for External Breast Prostheses, Biomedical Engineering Advances, Volume 10, November 2025, 100168
2. [Cite:2] Posttraumatic intracranial migration of silicone oil after treatment of retinal detachment, a rare complication, Radiology Case Reports, Volume 20, Issue 11, November 2025, Pages 5574-5577