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 cumulative NNI investment since fiscal year 2001, including the 2018 request, now totals more than $25 billion. In addition, more than $1.1 billion has been invested cumulatively since 2004 in funding for nanotechnology-based small businesses through the Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) programs of the participating Federal agencies. Nanotechnology-related environmental, health, and safety (EHS, or nanoEHS) activities have become a hallmark of the NNI, with R&D, policy, and regulation in this area extensively coordinated among Federal agencies. Cumulative NNI EHS investments surpassed $1 billion in 2015. For more information, visit the NNI Budget page.

Stay Connected with the NNI

Sign up for Email Alerts and Updates.

NNI-Sponsored Contests:

student video contest logoenvisionano logo