Cyclopentasiloxane (IOTA D5), chemically known as decamethylcyclopentasiloxane, CAS number 541-02-6, is a volatile silicone compound commonly used in cosmetics and daily chemical products.
This colorless, transparent liquid is odorless and non-greasy, while being renowned for its excellent spreadability, providing a soft and silky experience on the skin. The technical specifications of IOTA D5 show that its viscosity at 25°C is 3.9 mm²/s, its relative density is approximately 0.95, and its heavy metal content (as lead) is below 5 ppm, ensuring the product's safety and purity. It has a flash point of 80°C (closed cup method), providing good stability during storage and use.
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Functionally, IOTA D5 is widely used in a variety of everyday products. For example, in antiperspirants and deodorants, it serves as an instant carrier for active salts, helping to deliver rapid effects; in hair care products, IOTA D5 improves wet combability, reduces tangling, and leaves no residue on the hair. In skin care, it is a non-comedogenic softener that does not clog pores and also acts as an efficient carrier for active ingredients. Additionally, IOTA D5 is commonly found in perfume formulations, helping to release fragrance and forming a smooth feel on the skin to prevent a cold sensation.
The recommended usage of IOTA D5 varies depending on the application. For antiperspirants and deodorants, the usage is 3-10%, in hair care products it is 1-5%, in skin care products it is 3-10%, and in perfumes, it is recommended at 0.5-3%. Regarding safety, IOTA D5 has passed multiple safety tests, and when used properly, it poses no harm to the human body. While it is volatile, its residue is low, its nature is mild, and it does not have long-term effects on the skin or hair. However, to avoid any discomfort due to individual differences, the recommended usage should be followed.
Scientific data shows that within the recommended concentration range, IOTA D5 is a mild and effective ingredient suitable for wide use in personal care and daily chemical products.
