Short-chain chlorinated paraffins (SCCPs) were listed for elimination under the Stockholm Convention in 2017 due to their persistence and toxicity. Although Canada and other Stockholm signatories have prohibited the manufacture, usage and import of SCCPs since 2013, they can still be detected at high concentrations in indoor dust. To identify the sources of the SCCPs in the Canadian indoor environment, short-, medium- and long-chain chlorinated paraffins (SCCPs, MCCPs, LCCPs, respectively) were measured using a sensitive LC-ESI-orbitrap method. SCCPs were detected in 84 of the 96 products purchased in Canada after 2013 (87.5%) including electronic devices, clothing, plastics (toys), and paintings. Concentrations of SCCPs were up to 0.93% (9.34 mg g⁻¹). SCCPs were also detected in newly purchased toys at 0.005–2.02 mg g⁻¹, indicating the potential for children's exposure. Profiles of chlorinated paraffins differed among categories of products. For example, C₁₃-SCCPs were most common in toys, while electronic devices like headphones showed comparable concentrations of SCCPs and MCCPs. Additionally, four new carboxylate derivatives of CPs were detected in an electronic device sample. These are the first data to show the ubiquitous occurrences of SCCPs in a wide range of products currently marketed in Canada, suggesting continuing indoor exposure to SCCPs despite their prohibition.

中文翻译：

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消费品中普遍存在氯化石蜡

短链氯化石蜡 (SCCP) 因其持久性和毒性而于 2017 年被列入《斯德哥尔摩公约》的淘汰名单。尽管加拿大和其他斯德哥尔摩签署国自 2013 年起禁止制造、使用和进口短链氯化石蜡，但仍可在室内灰尘中检测到高浓度短链氯化石蜡。为了确定加拿大室内环境中 SCCP 的来源，使用灵敏的 LC-ESI-orbitrap 方法测量了短链、中链和长链氯化石蜡（分别为 SCCP、MCCP、LCCP）。2013 年之后在加拿大购买的 96 种产品中，有 84 种（87.5%）检测到短链氯化石蜡，包括电子设备、服装、塑料（玩具）和绘画。SCCP 的浓度高达 0.93%（9.34 mg g ⁻¹). 在新购买的玩具中也检测到 SCCPs，浓度为 0.005–2.02 mg g ^-1，表明儿童可能接触到。氯化石蜡的概况因产品类别而异。例如，C ₁₃ -SCCPs 在玩具中最常见，而耳机等电子设备的 SCCPs 和 MCCPs 浓度相当。此外，在电子设备样品中检测到四种新的 CP 羧酸盐衍生物。这些是显示短链氯化石蜡普遍存在于目前在加拿大销售的各种产品中的首批数据，表明尽管禁止使用短链氯化石蜡，但室内仍会持续暴露于短链氯化石蜡。