Date published: 2026-4-4

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Azure B (CAS 531-55-5)

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Alternate Names:
N,N,N′-Trimethylthionin
Application:
Azure B is a dye used for staining semi-thin sections of plant tissues
CAS Number:
531-55-5
Molecular Weight:
305.83
Molecular Formula:
C15H16ClN3S
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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Azure B is used for staining semi-thin sections of plant tissue. This dye is also useful in the NCCLS method for blood smears and Lillie′s modified Nocht′s method for paraffin sections.


Azure B (CAS 531-55-5) References

  1. The azure dyes: their purification and physicochemical properties. II. Purification of azure B.  |  Löhr, W., et al. 1975. Stain Technol. 50: 149-56. PMID: 1145656
  2. Analysis and testing of biological stains--the Biological Stain Commission Procedures.  |  Penney, DP., et al. 2002. Biotech Histochem. 77: 237-75. PMID: 12564600
  3. Azure B, a metabolite of methylene blue, is a high-potency, reversible inhibitor of monoamine oxidase.  |  Petzer, A., et al. 2012. Toxicol Appl Pharmacol. 258: 403-9. PMID: 22197611
  4. The interactions of azure B, a metabolite of methylene blue, with acetylcholinesterase and butyrylcholinesterase.  |  Petzer, A., et al. 2014. Toxicol Appl Pharmacol. 274: 488-93. PMID: 24161345
  5. Azure B and a synthetic structural analogue of methylene blue, ethylthioninium chloride, present with antidepressant-like properties.  |  Delport, A., et al. 2014. Life Sci. 117: 56-66. PMID: 25445435
  6. Azure B affects amyloid precursor protein metabolism in PS70 cells.  |  Biberoglu, K., et al. 2019. Chem Biol Interact. 299: 88-93. PMID: 30500345
  7. Azure B as a novel cyanide antidote: Preclinical in-vivo studies.  |  Haouzi, P., et al. 2020. Toxicol Rep. 7: 1459-1464. PMID: 33194557
  8. The vibronic absorption spectrum and electronic properties of Azure B in aqueous solution: TD-DFT/DFT study.  |  Kostjukova, LO., et al. 2021. J Mol Graph Model. 107: 107964. PMID: 34147837
  9. Probing multifunctional azure B conjugated gold nanoparticles with serum protein binding properties for trimodal photothermal, photodynamic, and chemo therapy: Biophysical and photophysical investigations.  |  Sonia, ., et al. 2022. Biomater Adv. 134: 112678. PMID: 35606220
  10. Synergistic degradation of Azure B and sulfanilamide antibiotics by the white-rot fungus Trametes versicolor with an activated ligninolytic enzyme system.  |  Zhang, H., et al. 2023. J Hazard Mater. 458: 131939. PMID: 37385098

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Azure B, 5 g

sc-203730
5 g
$32.00

Azure B, 25 g

sc-203730A
25 g
$52.00

Azure B, 100 g

sc-203730B
100 g
$124.00

Azure B, 1 kg

sc-203730C
1 kg
$749.00