Compound

3,7-bis(dimethylamino)phenothiazin-5-ium

An organic cation that is phenothiazin-5-ium substituted by dimethylamino groups at positions 3 and 7. The chloride salt is the histological dye 'methylene blue'.

Definition from ChEBI (CHEBI:43830), read 2026-09-23. CC BY 4.0.

CHEBI:43830ChEBI

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Structure

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A generated conformer of 3,7-bis(dimethylamino)phenothiazin-5-ium — one low-energy arrangement PubChem computed, not a measured structure. Hydrogens are not drawn; the formula counts them.

Class: Organic compound, cation
Formula: C16H18N3S
Mass: 284.408 g/mol
Charge: +1
InChIKey: RBTBFTRPCNLSDE-UHFFFAOYSA-N
SMILES: CN(C)c1ccc2nc3ccc(N(C)C)cc3[s+]c2c1
Look it up: ChEBI PubChem By InChIKey

Identity from ChEBI, geometry from PubChem. Not evidence.

What the reference databases state

Statements

1 statement

1 statement · 1 reference database · Subject: 3,7-bis(dimethylamino)phenothiazin-5-ium · Sources: ChEBI

Order

methylene blue is converted to 3,7-bis(dimethylamino)phenothiazin-5-iumCompoundChEBI CHEBI:6872Inferred only

Other names

1 name

Resolves to: 3,7-bis(dimethylamino)phenothiazin-5-ium

Also called: methylene blue cation