In October 2016, the European Union’s Scientific Committee on Consumer Safety (SCCS) issued an evaluation opinion on the ingredients of cyclopentasiloxane (D5): D5 may contain cyclotetrasiloxane (D4), D4 is classified as a reproductively toxic substance in the EU (Annex VI of Regulation (EC) No 1272/2008 (CLP Regulation)). Therefore the D4 concentration level required in D5 needs to be very low and the SCCS recommends the purity of D5 for consumer products Should be >99%.
Cyclopentamethicone is a colorless liquid and is a raw material in the Directory of Names of Used Cosmetic Raw Materials (2015 Edition).
Chinese name: Cyclopentamethicone
INCI name: Cyclopentasiloxane
CAS: 541-02-6
EC: 208-764-9
Chinese alias: decamethylcyclopentasiloxane; cyclopentasiloxane; decamethylcyclopentasiloxane (D5)
Cyclopentamethicone (hereinafter referred to as D5) is generally used as a volatile excipient in cosmetics. Due to its low surface tension, hydrophobicity, stability and other characteristics, it has a wide range of applications in cosmetics, such as Antistatic, emollient, humectant, solvent, viscosity control and hair conditioner.
On the basis of the data provided, SCCS believes that the concentration used by D5 is safe, except for hair styling spray products and sunscreen spray products, but may cause environmental problems, but the above data does not elaborate on environmental problems.
According to some opinions from the European Union and other countries, for example, the U.S. CIR expert group believes that cyclopentasiloxane is safe under current usage and dosage conditions; the Canadian government also believes that D4 is a risky substance that may Causes environmental and reproductive toxicity, but D5 does not cause harm to human health.
Therefore, D5 is safe under current usage, but during use, you must pay attention:
1. Its content is a very important factor, it must be guaranteed to be greater than 99%, and the impurity D4 it may contain must be strictly controlled;
2. Because D4 may cause reproductive toxicity, pregnant women should use it with caution. It may affect the production of breast milk and may also cause some health problems in babies, but there is no clear data to verify it.
