One of the key questions for manufacturers and importers is determining whether a given nanoscale material is already listed on the TSCA Inventory or if it is a new chemical requiring premanufacture notification to the Agency. On January 28, 2008, EPA released the TSCA Inventory Status of Nanoscale Substances - General Approach (2008) (PDF), (7 pp, 37K), describing EPA's current thinking regarding whether a nanoscale material is a "new" or "existing" chemical substance under TSCA. http://www.epa.gov/oppt/nano/
Are nanomaterials regarded as "chemical substances"?
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