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Physical & Chemical properties

Density

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Description of key information

The relative density of Multi-Walled Carbon Nanotubes (MWCNT) was determined by the pycnometer method to 1.988 at 20°C (Erstling, 2007a).

The agglomerate density of MWCNT was determined by high-pressure mercury porosimetry to 0.32 g/cm3 (Hammer, 2010a). Using low-pressure mercury porosimetry an agglomerate density of 0.14 g/cm3 was determined (Hammer, 2010b).

The true density of MWCNT was determined by the pycnometer method and was found to be 2.08 g/cm3 (25°C)  (Hammer, 2009).

The apparent settled density measured according to ISO 60 protocol is about 50 ± 15 g/l at 25°C (Lecloux, 2011a). The pour density of MWCNT was determined by a pycnometer method to 0.156 g/ml (non-micronised) and 0.109 g/ml (micronised) (Hammer, 2008).

Test material is meeting the form as described in section 4.5 of the IUCLID dossier.

Key value for chemical safety assessment

Relative density at 20C:
1.988

Additional information