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Methylsiloxanes in children silicone-containing products from China: Profiles, leaching, and children exposure
Xu, Lin; Zhi, Liqin; Cai, Yaqi
2017-12-01
Source PublicationENVIRONMENT INTERNATIONAL
Volume101Issue:0Pages:165-172
AbstractMethylsiloxanes (D4 -D6, L5 -L16) were detected in children silicone -containing products (n = 190, detected frequencies = 46-89%) marketed in China. For the 15 target compounds, the average concentrations ranged from < LOQ - 0.005 +/- 0.007 mu g/g in hard toys, 0.084 +/- 0.281-22.2 +/- 29.6 mu g/g in pacifiers, 0.020 +/- 0.023-20.6 +/- 16.0 mu g/g in teethers, and 0.005 +/- 0.009-2.81 +/- 322 mu g in soft rubber toys. Linear methylsiloxanes were predominant in these four types of children products. In the leaching test, except for L6, the other 14 methylsiloxanes were detected (mean = 0.001 +/- 0.008-0.770 +/- 2.60 ng/mL) in saliva leachates for children products, with the detection frequencies ranging from 4 to 46%. The conservative mouthing exposure for children were 6.87-18.05 ng/kg bw-day via pacifiers and 0.44-2.29 ng/kg bw-day via teether/soft rubber toys for Sigma cyclic methylsiloxanes, and 7.89-20.74 ng/kg bw-day via pacifiers and 0.41-2.12 ng/kg bw-day via teether/soft rubber toys for E linear methylsiloxanes. Methylsiloxanes conservative mouthing exposure associated with children products were 1-2 order of magnitudes lower than the sum of children's daily inhalation exposure and dust ingestion exposure in the indoor environment. The above results indicated that although methylsilOXanes, as the impurities of polydimethylsiloxane, distributed in children silicone -containing products, exposure arising from directly mouthing these products may not be the dominated pathway for children exposure of methylsiloxanes. (C) 2017 Elsevier Ltd. All rights reserved.
Department环境化学与生态毒理学国家重点实验室
KeywordMethylsiloxane Children Silicone-containing Product Leaching Test Mouthing Exposure
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/39362
Collection环境化学与生态毒理学国家重点实验室
Recommended Citation
GB/T 7714
Xu, Lin,Zhi, Liqin,Cai, Yaqi. Methylsiloxanes in children silicone-containing products from China: Profiles, leaching, and children exposure[J]. ENVIRONMENT INTERNATIONAL,2017,101(0):165-172.
APA Xu, Lin,Zhi, Liqin,&Cai, Yaqi.(2017).Methylsiloxanes in children silicone-containing products from China: Profiles, leaching, and children exposure.ENVIRONMENT INTERNATIONAL,101(0),165-172.
MLA Xu, Lin,et al."Methylsiloxanes in children silicone-containing products from China: Profiles, leaching, and children exposure".ENVIRONMENT INTERNATIONAL 101.0(2017):165-172.
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