Methylene green

Methylene green
Names
	IUPAC name [7-(dimethylamino)-4-nitrophenothiazin-3-ylidene]-dimethylazanium chloride
	Other names Basic Green 5; CI 52020
Identifiers
CAS Number	2679-01-8 ;
3D model (JSmol)	Interactive image ;
ChemSpider	68394 ;
ECHA InfoCard	100.018.392
MeSH	C028673
PubChem CID	75889 ;
UNII	F1IO2ZP7BU ;
CompTox Dashboard (EPA)	DTXSID70949598 ;
	InChI InChI=1S/C16H17N4O2S.ClH/c1-18(2)10-5-6-11-14(9-10)23-16-12(17-11)7-8-13(19(3)4)15(16)20(21)22;/h5-9H,1-4H3;1H/q+1;/p-1 Key: YYGBVRCTHASBKD-UHFFFAOYSA-M ; InChI=1/C16H17N4O2S.ClH/c1-18(2)10-5-6-11-14(9-10)23-16-12(17-11)7-8-13(19(3)4)15(16)20(21)22;/h5-9H,1-4H3;1H/q+1;/p-1 Key: YYGBVRCTHASBKD-REWHXWOFAG;
	SMILES O=[N+](c1c([s+]c(cc(N(C)C)cc2)c2n3)c3ccc1N(C)C)[O-].[Cl-];
Properties
Chemical formula	C16H17ClN4O2S
Molar mass	364.85 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

Last updated September 28, 2025

Methylene green is a heterocyclic aromatic chemical compound similar to methylene blue. It is used as a dye.^[1] It functions as a visible light-activated photocatalyst in organic synthesis.^[2]

References

↑ Senior W (November 1969). "Staining of animal tissues with the dye base of methylene green in benzene to facilitate identification and selection of material". Stain Technol. 44 (6): 269–71. doi:10.3109/10520296909063364. PMID 4187577.
↑ Rogers, David A.; Gallegos, Jillian M.; Hopkins, Megan D.; Lignieres, Austin A.; Pitzel, Amy K.; Lamar, Angus A. (September 2019). "Visible-light photocatalytic activation of N-chlorosuccinimide by organic dyes for the chlorination of arenes and heteroarenes". Tetrahedron. 75 (36) 130498. doi:10.1016/j.tet.2019.130498.

External links

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[pmid4187577-1] Senior W (November 1969). "Staining of animal tissues with the dye base of methylene green in benzene to facilitate identification and selection of material". Stain Technol. 44 (6): 269–71. doi:10.3109/10520296909063364. PMID 4187577.

[2] Rogers, David A.; Gallegos, Jillian M.; Hopkins, Megan D.; Lignieres, Austin A.; Pitzel, Amy K.; Lamar, Angus A. (September 2019). "Visible-light photocatalytic activation of N-chlorosuccinimide by organic dyes for the chlorination of arenes and heteroarenes". Tetrahedron. 75 (36) 130498. doi:10.1016/j.tet.2019.130498.

[1]

[2]

Names

IUPAC name [7-(dimethylamino)-4-nitrophenothiazin-3-ylidene]-dimethylazanium chloride
Other names Basic Green 5; CI 52020
Identifiers
CAS Number	2679-01-8 ^Y
3D model (JSmol)	Interactive image
ChemSpider	68394 ^N
ECHA InfoCard	100.018.392
MeSH	C028673
PubChem CID	75889
UNII	F1IO2ZP7BU ^N
CompTox Dashboard (EPA)	DTXSID70949598
InChI InChI=1S/C16H17N4O2S.ClH/c1-18(2)10-5-6-11-14(9-10)23-16-12(17-11)7-8-13(19(3)4)15(16)20(21)22;/h5-9H,1-4H3;1H/q+1;/p-1^N Key: YYGBVRCTHASBKD-UHFFFAOYSA-M^N InChI=1/C16H17N4O2S.ClH/c1-18(2)10-5-6-11-14(9-10)23-16-12(17-11)7-8-13(19(3)4)15(16)20(21)22;/h5-9H,1-4H3;1H/q+1;/p-1 Key: YYGBVRCTHASBKD-REWHXWOFAG
SMILES O=[N+](c1c([s+]c(cc(N(C)C)cc2)c2n3)c3ccc1N(C)C)[O-].[Cl-]
Properties
Chemical formula	C₁₆H₁₇ClN₄O₂S
Molar mass	364.85 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is ^YN ?) Infobox references