1. Product Overview
Decamethylcyclopentasiloxane (D5, CAS 541-02-6) is a colorless, odorless, and slightly volatile cyclic siloxane widely used as a base fluid and volatile carrier in cosmetic and personal care formulations. With the molecular formula C₁₀H₃₀O₅Si₅ and molecular weight 370.77, D5 is characterized by low surface tension (approx. 18.8 mN/m at 25°C), low viscosity (2.4 mm²/s), and rapid evaporation that leaves no residue on skin or hair. This product is non-greasy, non-stinging, and provides excellent spreading and lubricating properties.
As a leading decamethylcyclopentasiloxane supplier and D5 silicone manufacturer, Xinchem offers high-purity (≥99%) cosmetic-grade D5 backed by ISO9001 certification and REACH compliance. We support both custom synthesis and bulk/wholesale supply for global clients in cosmetics, personal care, pharmaceuticals, and industrial applications.
2. Specifications
| Parameter | Specification |
|---|---|
| Product Name | Decamethylcyclopentasiloxane (D5, Cyclomethicone D5) |
| CAS No. | 541-02-6 |
| Molecular Formula | C₁₀H₃₀O₅Si₅ |
| Molecular Weight | 370.77 g/mol |
| Appearance | Colorless, clear, odorless liquid |
| Purity (Cosmetic Grade) | ≥99.0% |
| Density (25°C) | 0.956 g/cm³ |
| Boiling Point (760 mmHg) | 210°C |
| Melting Point | -38°C |
| Flash Point | 76°C |
| Viscosity (25°C) | 2.4 mm²/s |
| Surface Tension | 18.8 mN/m |
| Vapor Pressure (25°C) | 0.285 mmHg |
| Refractive Index (nD20) | 1.398 |
| Solubility in Water | 17 ppb |
| HS Code (China Export) | 29319000 / 2931900001 |
| EINECS No. | 208-764-9 |
3. Applications
Decamethylcyclopentasiloxane (D5) is a versatile silicone fluid with applications spanning multiple industries:
| Application Sector | Key Uses |
|---|---|
| Cosmetics & Personal Care | Used as a volatile carrier and base fluid in skin care creams, lotions, sunscreens, foundations, makeup primers, deodorants, antiperspirants, hair conditioners, shampoos, and styling products. Provides dry, non-greasy feel, excellent spreadability, and lubricity. |
| Pharmaceutical Industry | Serves as a pharmaceutical secondary standard and certified reference material (CRM) for analytical testing in personal care formulations. |
| Industrial Cleaning | Acts as a cleaning fluid and dry cleaning solvent for textiles, leather, and fur, as well as industrial equipment degreasing. |
| Coatings & Electronics | Used in specialty coatings, electronic device cleaning, and as a lubricant additive. |
4. Supply Ability / CDMO Capabilities
Xinchem is a trusted decamethylcyclopentasiloxane manufacturer and supplier with robust supply capabilities:
| Parameter | Capability |
|---|---|
| Annual Production Capacity | 30,000+ metric tons |
| Purity Grade | Cosmetic grade (≥99%), Pharmaceutical grade (≥99.9%) |
| Custom Synthesis | Tailored molecular weight, viscosity, and purity specifications |
| Packaging Options | 25 kg drum, 180 kg drum, 200 kg drum, IBC container (1000 kg), flexitank |
| MOQ (Bulk/Wholesale) | 1 FCL (flexible for samples) |
| Lead Time | 7–14 days for bulk orders |
| Export Markets | EU, USA, Japan, Korea, Russia, Brazil, South America, Middle East |
| Logistics | Door-to-door shipping via sea, air, or rail; professional DG handling |
CDMO Services:
- Custom synthesis of silicone intermediates
- Contract manufacturing for private label
- Regulatory support (REACH registration, GMP documentation)
- Quality assurance with full COA and MSDS
5. Regulatory & Quality
- REACH (EU) Compliance: Xinchem ensures full compliance with Regulation (EU) 2024/1328 amending REACH Annex XVII Entry 70 on siloxanes. Starting June 6, 2026, D5 concentration in substances, mixtures, or articles placed on the EU market must not exceed 0.1% (w/w) unless specific exemptions apply.
- Cosmetic Regulation (EC) No 1223/2009: Since January 31, 2020, D5 is restricted to ≤0.1% in rinse-off cosmetic products.
- ISO9001:2015 Certification: Quality management system covering raw material procurement to final delivery.
- GMP Ready: Manufacturing processes aligned with GMP standards for pharmaceutical and cosmetic ingredients.
- EU REACH Registration Support: Technical dossier assistance for EU importers.
- Full Documentation: COA, MSDS, TDS, batch-specific analytical reports.
