Methyl purple, sodium salt

Product ID: M0121

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  • Buy 5 for $79.05 each and save 20%

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Redox indicator, purple to clear upon oxidation. Useful indicator of bacterial growth or plant redox mechanisms.

Useful indicator of bacterial growth or plant redox mechanisms. This analog of resazurin contains an additional methyl group which extends the color into the purple region of the spectrum.

Technical Data
SKU M0121
CAS Number 209187-17-7
Unit Size 50mg
Absorption 591nm
Detection Method Colorimetric
Molecular Formula C₁₄H₁₁O₃NNa
Molecular Weight 264.2
Soluble In H2O
Storage Conditions -20C, Desiccated

References and Citations


  • Bochner B.R., Naleway J.J. (1999) US Patent #5989853: "Gel matrix with redox purple for testing and characterizing microorganisms."
  • Graan T, Ort DR, Prince RC.(1985) "Methyl purple, an exceptionally sensitive monitor of chloroplast photosystem I turnover: physical properties and synthesis." Anal. Biochem. 144: 193-198.
  • Olsen, L.F., Cox, R.P. (1979) "Light-Induced Proton Transport by Chloroplasts Suspended in Fluid Media at Sub-Zero Temperatures: Kinetics and Stoichiometry" European Journal of Biochemistry 95(2): 427.
  • Hill, R., (1973) "A note on some old and some possible new redox indicators." Journal of Bioenergetics and Biomembranes 4(1-2): 229-237.
  • U. Schreiber; C. Neubauer; C. Klughammer (1989) "Devices and Methods for Room-Temperature Fluorescence Analysis" Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, 323(1216): 241-251.
  • Grann, T., Ort, D.R. (1983) "Initial Events in the Regulation of Electron Transfer in Chloroplasts: The Role of Membrane Potential" J. Biol. Chem. 258(5): 2831-2836.
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