TABLE III.
Respirable Dustiness Mass Fractions with Standard Deviation Ordered by Dustiness.
| Powder | Median Size, nm | Respirable Dustiness, mg/kg | Tukey’s Analysis1 | Dustiness Classification |
|---|---|---|---|---|
| SiO2 | 20 | 121.4 (14.6) | A | High |
| TiO2 | 5 | 60.4 (5.7) | B | Moderate |
| TiO2 | 21 | 45.3 (8.5) | B C | Moderate |
| Carbon Black | 14 | 42.9 (6.0) | B C | Moderate |
| Al2O3 | 10 | 40.4 (0.7) | B C D | Moderate |
| Nanofil® 5 | 10,000 | 29.0 (4.1) | C D E | Moderate |
| Cloisite® 20A | 6000 | 28.2 (9.4) | C D E F | Moderate |
| SWCNT1 | 1–2 x 15,000 | 21.1 (2.6) | D E F G | Moderate |
| TiO2 (Reagent) | NR3 | 18.2 (13.1) | E F G | Low |
| Al2O3 | 50 | 16.5 (1.5) | E F G | Low |
| Fe2O3 | 35 | 8.1 (0.8) | F G | Low |
| ARD2 | 9100 | 6.8 (0.8) | G | Low |
| Al2O3 whiskers | 2–4 x 2800 | 6.7 (1.2) | G | Low |
| Cu | 25 | 3.9 (1.3) | G | Very Low |
1
Equivalent letters indicates not significantly different for α = 0.05.