| Official names |
European Pharmacopoeia: Methylthioninium (chloride)
USP: Methylene Blue |
| Chemical name |
3,7-bis(Dimethylamino)-phenazathionium chloride
Tetramethylthionine chloride, trihydrate |
| Chemical formula |
C16H18ClN3S, 3H2O |
| Molecular mass |
319,85 g/mol ; 373,90 g/mol (trihydrate) |
| CAS number |
[61-73-4] (Anhydre)
[7220-79-3] (trihydrate) |
| Appearance |
Dark green to blue crystals with bronze lustre
crystalline powder |
| Odour |
Odourless |
| Solubility |
Soluble in cold water
Soluble in chloroform
Sparingly soluble in alcohol |
| Boiling Point |
Decomposes |
