Evaluation of Hazard and Exposure

Evaluation of Hazard and Exposure Associated with Nanosilver and Other Nanometal Oxide Pesticide Products

Presented on behalf of the Silver Nanotechnology Working Group (SNWG), an industry effort intended to foster the collection of data on silver and nanotechnology in order to advance the science and public understanding of the beneficial uses of silver nanoparticles in a wide-range of consumer and industrial products.

Nanoscale Silver – Perspective

  • Origins of nanoscale silver and terminology
  • Uses of nanoscale silver
  • Regulatory status for antimicrobial nanosilver products
  • Value of nanosilver products as antimicrobials (subject to FIFRA)

Nanoscale Silver – Origins

  • Scientific origins of silver nanoparticles buried within colloidal science
  • Colloidal sols are small solid particles suspended in a solvent
  • Colloidal silver produced since 1800s (and earlier)
  • Colloidal silver particles are synthesized through many methods (These methods are also used to produce silver nanoparticles today )
    • Liquid phase reduction reactions
    • Electrolytic methods
    • Vapor methods
    • Mechanical milling
    • etc.