Decamethylcyclopentasiloxane (D5)
| Chemical Name: | DecaMethylCyclo PentaSiloxane |
| Product Category: | Silicone Intermediate – Product |
| Structural Formula: |  |
| CAS No.: | 541-02-6 |
| EINECS: | 208-764-9 |
| Molecular Formula: | C10H30O5Si5 |
| Molecular Weight: | 370.770 |
Decamethylcyclopentasiloxane Description
Decamethylcyclopentasiloxane (D5) CAS 541-02-6, also known as cyclopentasiloxane, is a colorless liquid with the chemical formula C10H30O5Si5. It is widely used in cosmetics and personal care products due to its excellent compatibility with most alcohols and other cosmetic solvents.
Classified as a cyclomethicone, D5 is commonly found in deodorants, sunscreens, hair sprays, and skin care products, where it enhances smooth application and silky feel.
| Synonyms Products | Cyclopentasiloxane, Decamethyl-; Cyclopentasiloxane; Cyclomethicone5; D5 Cyclomethicone; Decamethylcyclopentasiloxan; Decamethylcylopentasiloxane; |
| CBNumber | CB9256200 |
| Melting point | -44 ℃ |
| Boiling point | 210.0 ℃(±0.0 °C at 760 mmHg) |
| Density | 0.958 g/cm³ |
| Appearance | colorless liquid |
| Flash point | 72.2 ℃ |
| Safety description | S23, S24/25, S36, S26 |
| Hazard symbol | XI |
| Hazard statement | R36/37/38, R53UN |
| Dangerous goods number | NA 1993 / PGIII |
| RTECS No | GY5945200 |
| TSCA | YES |
| Customs code | 29310095 |
| Uses | Widely used in cosmetics and body care products, it has good compatibility with most alcohols and other cosmetic solvents |
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Decamethylcyclopentasiloxane: Guide
Decamethylcyclopentasiloxane (D5) – CAS 541-02-6 is a colorless, odorless, volatile liquid cyclic siloxane that is safe, environmentally friendly, and widely used in health and beauty cosmetics and body care products such as deodorants, antiperspirants, makeup, shampoos, and body lotions. It has excellent compatibility with alcohols and most cosmetic solvents.
D5 is a cyclic siloxane with silicon-oxygen bonds arranged in a ring, with methyl groups attached to the silicon atoms. It serves as an important intermediate in silicone-based polymers, commonly used in personal care products and as a carrier component or dry cleaning solvent.
