Methylene blue (Loeffler) counterstain, for bacteriology, Sigma-Aldrich®

Supplier: MilliporeSigma
Warning

Synonyms: Basic Blue 9Swiss BlueMethylthioninium chlorideMethylene blue chloride3,7-Bis(dimethylamino)phenothiazin-5-ium chloride

1.01287.0100 1.01287.2500 1.01287.2500 1.01287.0500 1.01287.0500 1.01287.0100
CA1.01287.0100EA 41.76 CAD
EM1.01287.0500 CA1.01287.0100 CA1.01287.2500 CA1.01287.0500 EM1.01287.0100 EM1.01287.2500
Methylene blue (Loeffler) counterstain, for bacteriology, Sigma-Aldrich®
Methylene blue

Löffler's methylene blue solution is generally used as bacteriological counter staining of, e.g. of gonococcae, lactic acid bacteria and for visualization of the pole corpuscles of pasteurella.


It is often used in combination with Ziehl-Neelsen carbol fuchsin solution and hydrochloric acid in ethanol to stain mycobacteria. Löffler's methylene blue solution is an IVD product and CE registered, thus, it can be used in diagnostics and for laboratory accreditations.

Formula: C₁₆H₁₈ClN₃S
MW: 319.86 g/mol
Density: 0.97 g/cm3 (20 °C)
Flash Pt: 40 °C
Storage Temperature: Ambient
MDL Number: MFCD00150008
CAS Number: 61-73-4
UN: 1993
ADR: 3,III

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