Epoxy composite dusts with and without carbon nanotubes cause similar pulmonary responses, but differences in liver histology in mice following pulmonary deposition

Table 1 Overview of samples and average data on key physical chemical characteristics

Sample code	NRCWE ID number	Product form	Particle size^a	BET specific surface area	Total pore volume	TGA mass loss	Main elemental impurities	ng endotoxin/mg particle^c
CNT	NRCWE-026	Powder	11 ± 4 nm (diameter) 4+/− 0.4 μm (length)	246 m²/g	0.80 cm³/g	87 %	Al, Fe, Co^b	BD
EPOXY-REF	NRCWE-034	Sanding dust	ND	4.53 m²/g	0.005 cm³/g	99 %	ND	3.43E-05
EPOXY-CNT	NRCWE-035	Sanding dust	ND	2.45 m²/g	0.003 cm³/g	99 %	ND	4.12E-06
EPOCYL	NRCWE-036	Sanding dust	ND	2.65 m²/g	0.003 cm³/g	99 %	ND	BD
CB		Powder	14 nm^d	295−338 m²/g^e	ND	ND	N (0.82 %), H(0.01 %)^e	3.33E-03

ND not determined, BD below detection limit
^aAverage particle dimensions by SEM; ^bMain elemental impurities as determined by ICP-MS [6]; ^cEndotoxin content in particles/dust determined by Limulus Amebocyte Lysate test; ^dAccording to manufacturer’s data; ^e [26] and [27]

ISSN: 1743-8977