1. Detection method of 2-Phenoxyethanol
“Specification” “physical and chemical test method 4.7 methyl chloroisothiazolinone and other 12 kinds of components” stipulates the method of high performance liquid chromatography to determine the content of 12 kinds of preservatives such as phenoxyethanol, in which the detection limit of phenoxyethanol is 0.1 μg, the detection concentration is 200μg/g.
Current standards, including the recommended national standard “GB/T 26517-2011 Determination of Twenty-four Preservatives in Cosmetics by High Performance Liquid Chromatography” implemented on October 1, 2011 and the recommended one that will be implemented on April 1, 2019 Industry standard “QB/T 5290-2018 Phenoxyethanol Raw Materials for Cosmetics”.
2. 2-Phenoxyethanol risk substance detection method
1. Dioxane, its chemical name is 1,4-dioxane, and another name is dioxane. It is colorless and has a slight fragrance. From the perspective of chemical toxicity, it is slightly toxic , is irritating to the skin, eyes and respiratory system, and may cause damage to the liver, kidneys and nervous system.
The “General Requirements for Cosmetics Safety” in the “Specifications” clearly stipulates that the limit value of dioxane is ≤30 mg/kg (ppm), and stipulates two detection methods (“Physical and Chemical Test Methods” 2.19 Dioxane test method), using gas phase Chromatography-mass spectrometry is used to determine the content of dioxane in cosmetics, and the detection limit is 2 µg. One is quantified by the standard addition single-point method; the other is calculated by the standard curve method.
The national recommended standard “GB/T 30932-2014 Determination of Prohibited Dioxane Residues in Cosmetics Headspace Gas Chromatography-Mass Spectrometry” detection limit is 0.8mg/kg, by using deuterated dioxane as internal standard , after calculating the correction factors of dioxane and deuterated dioxane, the content of dioxane is obtained.
At present, when detecting dioxane, most testing institutions use the detection methods in the “Specifications” as the standard, and adopt the first method or the second method according to the actual situation of the laboratory.
II. Diethylene glycol, also known as diethylene glycol and diethylene glycol ether, is a colorless, transparent, hygroscopic viscous liquid; it has a pungent smell and is a low-toxic chemical substance. After entering the human body, it is quickly excreted due to metabolism , no obvious accumulation, so far no evidence of carcinogenicity, teratogenicity and mutagenicity has been found, but high dose intake can damage the kidneys.
Diethylene glycol is a banned substance in both China and the EU. It is stipulated in the EU’s restricted substance list that as a trace ingredient brought in, it cannot exceed 0.1% in the end product. That is, the “Opinions on Diethylene Glycol” (SCCP/1181/08) issued by SCCP (EU Consumer Products Technology Committee) in 2008 concluded that “diethylene glycol is used as a raw material such as glycerin and polyethylene glycol in cosmetics. , it is safe if the maximum concentration in the finished product does not exceed 0.1%.