EPA denkt über obligatorische Einforderung von Daten über Nanomaterialien nach
Während dem letzten Berichtzeitraum zwischen November 2008 und Mai 2009 hat das ressortübergreifende Testkomitee (Interagency Testing Committee ITC) wiederum das Thema Nanomaterialien und das freiwillige Reporting-Programm der EPA (Nanoscale Materials Stewardship Program NMSP) diskutiert. Da verschiedene U.S.-Behörden über das ITC Datenbedarf zu Nanomaterialien angemeldet haben, sowie im Hinblick auf die beschränkte Abdeckung des NMSP, beabsichtigt EPA nun die Entwicklung eines obligatorischen Verfahrens zur Einforderung der nötigen Daten unter TSCA Section 8(a).
The Interagency Testing Committee (ITC) was established by section 4(e) of TSCA ‘‘to make recommendations to the Administrator respecting the chemical substances and mixtures to which the Administrator should give priority consideration for the promulgation of rules for testing under TSCA section 4(a).
EPA intends to develop a proposed TSCA section 8(a) rule to obtain information on the production, uses, and exposures of existing nanoscale materials. EPA has indicated that it will ensure that the chemicals where there is ITC interest are either included in that action or are otherwise new chemical substances subject to premanufacture notification (PMN) reporting under TSCA. EPA also intends to develop a proposed TSCA section 4 rule to develop needed environmental, health, and safety data.
According to the Federal Register Notice, att this time, there are several U.S. Government organizations on the ITC that continue to have data needs for nanoscale materials. Many of these nanoscale materials do not have CAS numbers, or have CAS numbers that may be associated with the non-nanoscale chemical. The U.S. Government organizations on the ITC have data needs for occupational exposure and mammalian toxicology data for the following nanoscale materials, and are reviewing data submitted in PMNs or in response to the NMSP:
- Materials having CAS numbers that are only nanoscale at the molecular level:
- C60 fullerenes–CAS No. 135105–52–1 (this is the generic C60 fullerene; many other CAS numbers exist for specific C60 fullerene structural isomers, including, for example, CAS No. 99685–96–8, for [5,6]Fullerene-C60- Ih)
- C90 fullerenes–CAS No. 135113–17–6 (this is the generic C90 fullerene; other CAS numbers exist for specific C90 fullerene structural isomers)
- Materials having CAS numbers that can exist in the nanoscale and bulk forms:
- Carbon black, nano form–CAS No. 1333– 86–4
- Titanium oxide (TiO2) nanowires–CAS No. 13463–67–7
- Titanium oxide (TiO2) nanoparticles— CAS No. 13463–67–7
- Zinc oxide (ZnO), nano form—CAS No. 1314–13–2
- Silver, nano form—CAS No. 7440–22–4
- Silica [crystalline], nano form—CAS No. 7631–86–9
- Quartz (SiO2), nano form—CAS No. 14808–60–7
- Cerium oxide (CeO2), nano form—CAS No. 1306–38–3
- Indium tin oxide, nano form—CAS No. 50926–11–9
- Indium tin oxide (In1.69Sn0.15O2.85), nano form—CAS No. 71243–84–0
- Indium tin oxide (In0.01SnO2), nano form—CAS No. 212075–26–8
- Indium tin oxide (In0.02Sn0.98O1.99), nano form—CAS No. 180090–96–4
- Dendrimers—there are a number of CAS numbers describing certain compositions of dendrimers
- Materials with no CAS numbers that either can exist in both the nano and bulk forms or are only nanoscale:
- Single–walled carbon nanotubes
- Multi–walled carbon nanotubes
- Carbon nanofibers
- Quantum dots with Cd core
- Quantum dots with Se core
- Nanoceramic particles
- Nanoclays