| Name of the substance | Nature of material | Primary particle size (nm) | Primary particle size distribution | Method used to determine particle size | Specific area (BET method) (m2/g) | Reference |
|---|---|---|---|---|---|---|
| NM‐200 | Precipitated silica | 14–23 |
89% below 100 nm 70% below 50 nm 2% below 10 nm |
TEM | 189 | JRC (2016) |
| NM‐201 | Precipitated silica | 17–19 |
82% below 100 nm 55% below 50 nm 1% below 10 nm |
140 | ||
| NM‐202 | Fumed silica | 15–20 |
80%% below 100 nm 55% below 50 nm 1% below 10 nm |
204 | ||
| NM‐203 | Fumed silica | 13–45 |
78% below 100 nm 48% below 50 nm |
TEM | 203 | JRC (2014) |
BET: Brunauer–Emmett–Teller; TEM: transmission electron microscopy.