Mingyi silicone（anhui）co,.ltd
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Dodecamethylcyclohexasiloxane (D6) is an organosilicon compound with the chemical formula C₁₂H₃₆O₆Si₆. This cyclic volatile methylsiloxane (cVMS) appears as a clear, colorless liquid at room temperature, characterized by its odorless nature and low surface tension. With a molecular weight of 444.92 g/mol, D6 exhibits unique physicochemical properties that make it valuable across various industries.
D6 demonstrates several notable physical and chemical properties:
Volatility: Evaporates rapidly from surfaces at room temperature
Hydrophobicity: Repels water while mixing readily with organic solvents
Thermal Stability: Maintains integrity across a wide temperature range
Low Surface Tension: Provides excellent spreading capabilities
High Spreadability: Creates uniform thin films on applied surfaces
These characteristics contribute to its widespread application in numerous commercial and industrial products.
D6 serves multiple functions in cosmetic formulations:
Acts as a carrier solvent for active ingredients
Provides smooth texture and silky feel in skincare products
Enhances spreadability in makeup formulations
Creates non-greasy, volatile films in antiperspirants and deodorants
Improves conditioning properties in hair care products
Manufacturing Intermediate: Serves as precursor for silicone polymers, resins, and rubbers
Lubricants: Provides lubrication in various mechanical applications
Water Repellents: Used in waterproof coatings and treatments
Defoaming Agents: Employed in industrial processes to control foam
Release Agents: Facilitates mold release in manufacturing processes
Recent studies and regulatory assessments have identified concerns regarding:
Persistence: D6 demonstrates environmental persistence with slow degradation rates
Bioaccumulation: Potential to accumulate in aquatic organisms
Long-range Transport: Ability to travel significant distances from emission sources
Ecotoxicity: Effects on aquatic life and ecosystems
While D6 itself isn't classified as acutely toxic, considerations include:
Potential presence of trace impurities with greater toxicity concerns
Ongoing research into long-term exposure effects
Evaluation of endocrine disruption potential
Assessment of reproductive and developmental toxicity
European Union: Listed as Substance of Very High Concern (SVHC) under REACH
Canada: Designated as a priority substance under environmental protection acts
United States: Subject to EPA reporting requirements and use restrictions
Banned in rinse-off cosmetic products in certain jurisdictions
Pending restrictions on leave-on cosmetic products (effective 2026 in EU)
Increasing limitations on industrial applications and emissions
The chemical industry is actively developing:
Alternative silicone chemistries with improved environmental profiles
Bio-based and biodegradable replacement options
Reformulated products reducing or eliminating D6 content
Enhanced manufacturing processes to minimize environmental release
Growing consumer demand for "silicone-free" products
Increased regulatory pressure driving innovation
Development of green chemistry alternatives
Enhanced environmental monitoring and reporting requirements
Dodecamethylcyclohexasiloxane (D6) represents an important class of industrial chemicals that have enabled significant technological advances across multiple sectors. While its unique properties have made it valuable in numerous applications, increasing environmental concerns and regulatory developments are shaping the future of this compound. The industry continues to evolve through innovation, seeking to balance functional performance with environmental responsibility through alternative solutions and improved manufacturing practices.
The ongoing scientific research and regulatory developments will continue to inform the safe use and potential phase-out of D6 in various applications, driving the chemical industry toward more sustainable and environmentally conscious solutions.
