ヘアケア製品の化学物質が空気中に驚くほど残留している可能性(Study: Hair care product chemicals can linger in the air in surprising amounts)

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2023-11-17 パデュー大学

◆パデュー大学の研究によると、髪のお手入れ製品に広く使われるシクリック揮発性メチルシロキサンなどの化学物質が、使用後も室内に残留していることが判明。1回のヘアケアセッションで、平均して1-17ミリグラムの潜在的に有害な化学物質を吸入する可能性があると報告されました。研究者はこれを「非常に警告的な結果」と評価し、日常のヘアケアでの揮発性化学物質の排出に驚きました。

<関連情報>

建物内でのヘアケア製品使用時のシロキサン放出と暴露 Siloxane Emissions and Exposures during the Use of Hair Care Products in Buildings

Jinglin Jiang, Xiaosu Ding, Satya S. Patra, Jordan N. Cross, Chunxu Huang, Vinay Kumar, Paige Price, Emily K. Reidy, Antonios Tasoglou, Heinz Huber, Philip S. Stevens, Brandon E. Boor, and Nusrat Jung
Environmental Science & Technology  Published:November 16, 2023
DOI:https://doi.org/10.1021/acs.est.3c05156

Abstract

ヘアケア製品の化学物質が空気中に驚くほど残留している可能性(Study: Hair care product chemicals can linger in the air in surprising amounts)

Cyclic volatile methyl siloxanes (cVMS) are ubiquitous in hair care products (HCPs). cVMS emissions from HCPs are of concern, given the potential adverse impact of siloxanes on the environment and human health. To characterize cVMS emissions and exposures during the use of HCPs, realistic hair care experiments were conducted in a residential building. Siloxane-based HCPs were tested using common hair styling techniques, including straightening, curling, waving, and oiling. VOC concentrations were measured via proton-transfer-reaction time-of-flight mass spectrometry. HCP use drove rapid changes in the chemical composition of the indoor atmosphere. cVMS dominated VOC emissions from HCP use, and decamethylcyclopentasiloxane (D5) contributed the most to cVMS emissions. cVMS emission factors (EFs) during hair care routines ranged from 110–1500 mg/person and were influenced by HCP type, styling tools, operation temperatures, and hair length. The high temperature of styling tools and the high surface area of hair enhanced VOC emissions. Increasing the hair straightener temperature from room temperature to 210 °C increased cVMS EFs by 50–310%. Elevated indoor cVMS concentrations can result in substantial indoor-to-outdoor transport of cVMS via ventilation (0.4–6 tons D5/year in the U.S.); thus, hair care routines may augment the abundance of cVMS in the outdoor atmosphere.

1900環境一般
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