Toluidine blue

Toluidine blue
Names
	IUPAC name (7-amino-8-methylphenothiazin-3-ylidene)-dimethylammonium chloride
	Other names Toluidine blue O
Identifiers
CAS Number	92-31-9 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:87647 ;
ChEMBL	ChEMBL1790006 ;
ChemSpider	11239098 ;
ECHA InfoCard	100.001.952
MeSH	Tolonium+chloride
PubChem CID	7084;
UNII	15XUH0X66N ;
CompTox Dashboard (EPA)	DTXSID9048728 ;
	InChI InChI=1S/C15H16N3S.ClH/c1-9-6-13-15(8-11(9)16)19-14-7-10(18(2)3)4-5-12(14)17-13;/h4-8H,16H2,1-3H3;1H/q+1;/p-1 Key: HNONEKILPDHFOL-UHFFFAOYSA-M ; InChI=1/C15H16N3S.ClH/c1-9-6-13-15(8-11(9)16)19-14-7-10(18(2)3)4-5-12(14)17-13;/h4-8H,16H2,1-3H3;1H/q+1;/p-1 Key: HNONEKILPDHFOL-REWHXWOFAY;
	SMILES [Cl-].CN(C)c1ccc2nc3cc(C)c(N)cc3[s+]c2c1;
Properties
Chemical formula	C15H16N3S+
Molar mass	270.374 g/mol
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Toluidine blue, also known as TBO or tolonium chloride (INN) is a blue cationic (basic) dye used in histology (as the toluidine blue stain) and sometimes clinically.