Resazurin sodium salt
Resazurin sodium salt (CAS 62758-13-8) is a blue powder with the molecular formula C12H6NNaO4 and a molecular weight of 251.17. Certified by the Biological Stain Commission, this dye is essential for measuring metabolic activity and cell proliferation. It undergoes bioreduction, converting from a blue oxidized form to a red fluorescent intermediate, indicating cellular viability.
- IUPAC
- 7-Hydroxy-3H-phenoxazin-3-one-10-oxide sodium salt
- Synonyms
- 7-Hydroxy-3H-phenoxazin-3-one-10-oxide sodium salt

Cell Viability and Metabolic Activity Measurement
Resazurin sodium salt serves as a sensitive indicator for assessing the metabolic activity of living cells. Its reduction to a fluorescent red product directly correlates with cellular respiration and viability, making it a key reagent in cell-based assays.
Cell Proliferation Assays
The dye's ability to reflect metabolic status also allows for the evaluation of cell proliferation. Changes in the concentration of the fluorescent product over time can be used to quantify the rate at which cells are multiplying.
Staining and Histology
As a certified stain and dye, Resazurin sodium salt is utilized in various histological and hematological applications where cellular morphology and metabolic state require visual or quantitative assessment.
| Molecular weight | 251.17 |
|---|---|
| Empirical formula | C12H6NNaO4 |
| Grade | certified by the Biological Stain Commission |
| Form | powder |
| Solubility | 1 M NH4OH: soluble1 mg/mL |
| Application | For the measurement of metabolic activity and proliferation of living cells.1,2 The bioreduction of the dye reduces the amount of the oxidized form (blue) and concomitantly increases the fluorescent intermediate (red). |
| Composition | Dye content, 75% |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Absorption | λmax 380 nm (2nd)λmax 598 nm |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Resazurin sodium salt used for?
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Resazurin sodium salt is primarily used for the measurement of metabolic activity and proliferation of living cells. It acts as an indicator dye that changes colour upon bioreduction by metabolically active cells.
What is the CAS number and molecular formula for Resazurin sodium salt?
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The CAS number for Resazurin sodium salt is 62758-13-8 and its molecular formula is C12H6NNaO4.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Resazurin sodium salt certified by the Biological Stain Commission, with a dye content of 75%. We do not represent this product as USP, BP, or EP grade.
How should Resazurin sodium salt be handled safely?
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Resazurin sodium salt is a warning substance that can cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask (type N95), eyeshields, and gloves, should be worn. Handle in a well-ventilated area.
Is Resazurin sodium salt a controlled substance?
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Based on the provided data, Resazurin sodium salt is not listed as a controlled substance.
How is Resazurin sodium salt packed and shipped?
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Resazurin sodium salt is supplied as a powder. Specific packaging and shipping details for export can be provided upon request, adhering to international regulations for chemical transport.
How can I request a quote or sample for Resazurin sodium salt?
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To request a quote or sample for Resazurin sodium salt, please contact our sales team through the TSS website or via the provided contact details, specifying your requirements and shipping information.
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