The U.S. Environmental Protection Agency (EPA)announcedon July 2, 2020, that it registered NSPW Nanosilver as a new active ingredient that helps suppress odor-causing bacteria, and algae, fungus, mold, and mildew that can cause deterioration or staining in textiles. EPA notes that NSPW Nanosilver is registered only for use in specified textiles, including fabrics, sportswear, footwear, linens, and awnings. NSPW Nanosilver is the active ingredient in the pesticide product POLYGUARD-NSPW MASTER BATCH (Polyguard). According to EPA, Polyguard will be formulated as a master batch, meaning that NSPW Nanosilver will be embedded within plastic beads or pellets. EPA states that these beads or pellets “are polymeric materials similar to nylon or polyester which are incorporated/infused into textiles through a closed-loop manufacturing process called extrusion.” Once introduced into the process, no beads or pellets can escape into the environment. Available data indicate that the leach rate of nanosilver derived from NSPW Nanosilver-treated textiles is below the limit of detection; the potential for environmental exposure of the polymer is presumed to be negligible.

EPA注意到NSPW纳米银是在2015年授予的用作材料的纺织品和塑料防腐剂先前有条件注册的活性成分。betway官方网站据报道在2017年我们5月31日,memorandum,该注册被质疑不过,和上诉第九巡回美国法院腾出其理由是美国环保署的调查准予登记的公共利益是在记录中不支持的。EPA指出当前操作具有预期限制的暴露相比前有条件注册的改性用途的图案。根据EPA,额外的数据提交和审查,以更新NSPW纳米银风险评估,允许无条件报名。

EPAstates that based on its human health and ecological risk assessment, it has determined that the new active ingredient, NSPW Nanosilver, meets the regulatory standard under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) for use as a materials preservative in textiles in Polyguard. Although EPA includes a link toDocket ID EPA-HQ-OPP-2020-0043to view the product registration and response to comments, those materials are not yet posted in the docket.