3 - Hazards identification Potential Health Effects Eye Contact: May cause eye irritation Skin Contact: At this time, it is not fully known whether skin penetration of nanoparticles would result in adverse effects in animal models. However,topical application of raw SWCNT to nude mice has been shown to cause dermal irritation[Murray et al. 2007]. Studies conducted in vitro using primary or cultured human skin cells have shown that both SWCNT and multi-walled carbon nanotubes (MWCNT) can enter cells and cause release of pro- inflammatory cytokines, oxidative stress, and decreased viability [Monteiro-Riviere et al. 2005; Shvedova et al. 2003]. It remains unclear, however, how these findings may be extrapolated to a potential occupational risk, given that additional data are not yet available for comparing the cell model studies with actual conditions of occupational exposure. Research on the dermal exposure of nanomaterials is ongoing (www.unileipzig. de/~nanoderm/). Ingestion can occur from Inhalation: Inhalation is the most common route of exposure to airborne particles in the workplace. Inhalation may lead to the formation of lung Granulomas or possibly Mesothelioma. Use NIOSH Approved respirators (N100 or P100) with a full face shield to prevent Inhalation. Ingestion: No known hazards, but may irritate gastrointestinal tract Acute and Chronic High concentration of dusts may be irritating to eyes, skin, Health Effects: mucus membranes and respiratory tract. Ingestion can occur from Unintentional hand to mouth transfer of materials; this has been found to happen with Traditional materials, and it is scientifically reasonable to assume that it also could happen During handling of nanomaterials. Ingestion may also accompany inhalation exposure because particles that are cleared from the respiratory tract via the mucociliary escalator may be swallowed [ICRP 1994]. Little is known about possible adverse effects from the ingestion of nanomaterials. - Information pertaining to particular dangers for man and environment
R 36/37 Irritating to eyes and respiratory system.
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