CPSC study: Release of Silver from Nanotechnology-Based Consumer Products for Children

Subject Area:
Non-NNI Other Reports
EHS-related Documents
Author: Consumer Product Safety Commission (CPSC)
Publication Date: Jul. 3 2013

Description:

Abstract: We assessed the potential for children’s exposure to bioavailable silver during the realistic use of selected nanotechnology-based consumer products (plush toy, fabric products, breast milk storage bags, sippy cups, cleaning products, humidifiers, and humidifier accessory). We measured the release of ionic and particulate silver from products into water, orange juice, milk formula, synthetic saliva, sweat, and urine (1:50 product to liquid mass ratio); into air; and onto dermal wipes. Of the liquid media, sweat and urine yielded the highest amount of silver release, up to 38% of the silver mass in products; tap water yielded the lowest amount, ≤1.5%. Leaching from a blanket into sweat plateaued within 5 min, with less silver released after washing. Between 0.3 and 23 μg m–2 of silver transferred from products to wipes. Aerosol concentrations were not significantly elevated during product use. Fabrics, a plush toy, and cleaning products were most likely to release silver. Silver leached mainly via dissolution and was facilitated in media with high salt concentrations. Levels of silver to which children may potentially be exposed during the normal use of these consumer products is predicted to be low, and bioavailable silver is expected to be in ionic rather than particulate form.


Nanotechnology Fact

The National Nanotechnology Initiative (NNI) is a U.S. Government research and development (R&D) initiative involving the nanotechnology-related activities of 20 departments and independent agencies. Since 2001, Federal agencies and Cabinet-level departments have invested more than $25 billion in nanotechnology research, development, and commercialization. These investments, made under the auspices of the NNI, have enabled groundbreaking discoveries that have revolutionized science; established world-class facilities for the characterization of nanoscale materials and their fabrication into nanoscale devices; educated tens of thousands of individuals from undergraduate students to postdoctoral researchers; and fostered the responsible incorporation of nanotechnology into commercial products.

For more information on how the NNI started and how it is organized, see the page entitled What is the NNI?

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