Nano Archive

Toxicity of single-walled carbon nanohorns

Miyawaki, Jin and Yudasaka, Masako and Azami, Takeshi and Kubo, Yoshimi and Iijima, Sumio (2008) Toxicity of single-walled carbon nanohorns. ACS NANO, 2 (2). pp. 213-226.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nn700185t

Abstract

We extensively investigated in vitro and in vivo the toxicities of as-grown single-walled carbon nanohorns (SWNHs), a tubular nanocarbon containing no metal impurity. The SWNHs were found to be a nonirritant and a nondermal sensitizer through skin primary and conjunctival irritation tests and skin sensitization test. Negative mutagenic and clastogenic potentials suggest that SWNHs are not carcinogenic. The acute peroral toxicity of SWNHs was found to be quite low-the lethal dosage for rats was more than 2000 mg/kg of body weight. Intratracheal instillation tests revealed that SWNHs rarely damaged rat lung tissue for a 90-day test period, although black pigmentation due to accumulated nanohorns was observed. While further toxicological assessments, including chronic (repeated dose), reproductive, and developmental toxicity studies, are still needed, yet the present results strongly suggest that as-grown SWNHs have low acute toxicities.

Item Type:Article
Uncontrolled Keywords:carbon nanohorn; acute toxicity; genotoxicity; carbon nanotube; fullerene
Subjects:Physical Science > Nano objects
NanoSafety > Environment, health and safety aspects of nanotechnology
ID Code:521
Deposited By:IoN
Deposited On:20 Jan 2009 11:20
Last Modified:20 Jan 2009 11:20

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