Cyclosiloxanes - Information Center

D4 - Health and Environment


Environmental protection – our priority

The environmental properties and fate of D4 have been subject to extensive study for many years, including recent environmental monitoring programmes in North America, Japan and Europe.

The results of this continuous research demonstrate that the substance does not behave as a so-called PBT (persistent, bioaccumulating and toxic substance) in the environment as D4 is used today.

Committed to the responsible use of silicones, the silicones industry continues to evaluate the science behind its materials through rigorous research programs and regularly communicates research findings to customers, government officials and the scientific community.

What happens in the environment?

Highly volatile, D4 evaporates rapidly and degrades in air under the influence of sunlight. The small amounts that may remain in soil degrade, and in water they hydrolyze. Ultimately, the substance becomes silica (sand), carbon dioxide and water.

For more details on the environmental properties of D4 please visit the Science section of this website.

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Safety first!

There is nothing more important to the silicone industry than the safety of its products. More than 50 years of scientific research have been dedicated to assess the safety of silicones and siloxanes relative to workers, consumers, the environment and manufacturing processes. The results of this continuous research and testing demonstrate that silicones and siloxanes, including D4, are safe in their diverse and vital applications.

Regulatory agencies in North America and in Europe have reviewed the scientific data and confirmed the safety of D4 for human health.

In addition, expert scientific panels such as the U.S. Cosmetic Ingredient Review (CIR) and the EU Scientific Committee for Consumer Safety (SCCS) have concluded that the substance does not pose a risk to human health from its use in cosmetics.

Product stewardship

Committed to the responsible use of silicones, the industry continues to evaluate the science behind its materials through several rigorous research programs. Research methods include computer modeling, laboratory testing, environmental monitoring and other approaches. The silicones industry cooperates closely with regulatory agencies and expert scientific panels in North America, Europe and Japan, and share new research data with them as it becomes available.

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