Content of D5: ≥98.5% Packing: PTFE Lined Iron Drum or Plastic Drum Net weight: 190kg/Drum Storage:Clean, dry, ventilated environment; Avoid exposure to rain andsunlight. Transportation: Dangerous goods under transport regulations
Decamethylcyclopentasiloxane(D5) has the formula [(CH₃)₂SiO]₅, and consists of five silicone oxygen units (-Si-O-) to form a cyclic structure, with each silicone atom connected to two methyl groups, and it is also known as “Cyclopenta polydimethylsiloxane”. Siloxane”. Its physical properties show that it is a colorless transparent liquid with good fluidity and no impurities, high volatility (no residue after evaporation), giving cosmetics a refreshing skin feel, and at the same time, it is highly compatible with solvents such as alcohols, esters and other solvents, with a high degree of safety, and is suitable for use on sensitive skin.
Decamethylcyclopentasiloxane(D5) monomer is synthesized by hydrolysis, cracking and distillation of dimethyldichlorosilane as raw material for industrial preparation, and free water and impurities should be strictly controlled in the production process to ensure the purity. Technical parameters show that its chromaticity ≤ 10 Hazen (colorless and transparent), fast reaction speed, suitable for the efficient production of silicone oil and silicone rubber, storage should be protected from light and moisture.
With its unique ring structure, excellent physical and chemical properties and efficient production process, D5 is widely used in cosmetics (e.g., hair conditioners, skin care products) and industrial fields (e.g., lubricants, sealing materials), while its safety and environmental compatibility drive its continuous development under the background of tighter regulation.
| Decamethylcyclopentasiloxane Basic information | |
| Product Name | Decamethylcyclopentasiloxane |
| Synonyms | Siloxane D5,Cyclopentasiloxane Decamethyl,Cyclic dimethylsiloxane pentamer, Cyclo-decamethylpentasiloxane, Cyclomethicone pentamer 245, |
| CAS | 541-02-6 |
| Molecular Formula | [(CH₃)₂SiO]₅ |
| Molecular Weight | 370.77 |
| EINECS | 208-764-9 |
| Decamethylcyclopentasiloxane Chemical Properties | |
| Melting point | -44°C |
| Boiling point | 90 °C/10 mmHg (lit.) |
| Density | 0.958 g/mL at 25 °C (lit.) |
| Storage temp | 2-8°C |
| Solubility | <0.0001g/l (calculated) |
| Form | Liquid |
| Color | Colorless |
| Specific Gravity | 0.959 |
| Refractive Index | n20/D 1.396(lit.) |
| Water Solubility | Immiscible with water. |
| Decamethylcyclopentasiloxane Safety Information | |
| Hazard Codes | Xi |
| Risk Statements | 36/37/38-53 |
| Safety Statements | 23-24/25-36-26 |
| RIDADR | NA 1993 / PGIII |
| WGK Germany | 2 |
| RTECS | GY5945200 |
Personal Care & Cosmetics
Conditioning agent and carrier: D5, as a volatile silicone, is widely used in hair conditioners, skin care products, sunscreens, etc. It forms a light protective layer and enhances the smoothness of skin feel.
Active Ingredient Delivery: Carrying antioxidants, plant extracts and other active ingredients to enhance skin absorption efficiency.
Industrial Material Synthesis
Silicone Rubber & Silicone Oil: As a silicone intermediate, D5 produces silicone rubber (used in seals and insulating materials) and silicone oil (used in lubricants and defoamers) through ring-opening polymerization.
Mold release agents and lubricants: directly used in petrochemical, textile printing and dyeing industries to improve processing efficiency.
siloxanes are a class of silicone compounds with
What is Silicone Material? Learn about silicone
The presence of silanol groups (Si-0H) on the gl
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