Resazurin sodium salt

powder, BioReagent, suitable for cell culture

7-Hydroxy-3H-phenoxazin-3-one-10-oxide sodium salt
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level

product line





Dye content, ~80%


cell culture | mammalian: suitable

pH range

3.8 - 6.5, orange to violet


H2O: soluble


600 nm

SMILES string




InChI key


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Resazurin sodium salt has been used in viability assay:
  • to measure cell viability of A. fumigatus
  • to assess cell proliferation
  • to determine A. fumigatus viability in high-throughput screenings of microbial natural extracts

For the measurement of metabolic activity and proliferation of living cells. The bioreduction of the dye reduces the amount of the oxidized form (blue) and concomitantly increases the fluorescent intermediate (red).


1, 5 g in glass bottle

Biochem/physiol Actions

Resazurin is a blue, non-fluorescent dye originally used to test milk/biological fluids for bacterial and yeast contamination. It is also useful in sperm viability and semen quality test. Resazurin is applicable in cytotoxicity determination.

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
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Chao DT, et al.
Journal of Cancer Research and Clinical Oncology, 139, 315?325-315?325 (2012)
Investigation of the Alamar Blue (resazurin) fluorescent dye for the assessment of mammalian cell cytotoxicity
O Brien J, et al.
European Journal of Biochemistry, 267(17), 5421-5426 (2000)
Hitting the caspofungin salvage pathway of human-pathogenic fungi with the novel lasso peptide humidimycin (MDN-0010)
Valiante V, et al.
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