| Label | Id | |
|---|---|---|
| Per Million | CONC | |
| ppm | CONC | |
| part per million (ppm) | CONC | |
| ppms | CONC | |
| PPM | CONC | |
| Part per Million | CONC | |
| part per million | CONC | |
| PART PER MILLION | CONC | |
| [ppm] | CONC | |
| parts per million | CONC | |
| Mole | CONC | |
| Mole, unit of measurement | CONC | |
| mol | CONC | |
| MOLE | CONC | |
| mole | CONC |