| Dye | Methylene blue |
| Structure |
|
| Chemical formula | C16H18ClN3S |
| Molecular weight (g/mol) | 319.85 |
| Peak wavelength λ max (nm) | 662 |
| Solubility in water | 40 g/mol à 20˚C |
| degree of purity | 82% |
| Smell | odourless |