Phloxine B

antibacterial fluorescent dye

D&C;Red No. 28, Acid Red 92, Eosin 10B, Cyanosine, 2′,4′,5′,7′-Tetrabromo-4,5,6,7-tetrachlorofluorescein disodium salt
Empirical Formula (Hill Notation):
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Quality Level




hematology: suitable
histology: suitable


water: 1 mg/mL, clear, red


1150-1300 at 546-550 nm in 50% ethanol

Featured Industry

Diagnostic Assay Manufacturing

storage temp.

room temp

SMILES string




InChI key


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Phloxine B has been used to trace the uptake of double stranded RNA by green peach aphids. It has also been used to stain yeast strains.


25, 100 g in glass bottle

Biochem/physiol Actions

Phloxine B has been demonstrated as an alternative to Gram staining. It was found to inhibit the growth of methicillin-resistant Staphylococcus aureus. Phloxine B stimulated and inhibited the channel activity of wild-type cystic fibrosis transmembrane conductance regulator (CFTR). It has antibacterial properties. Phloxine B staining can be used to distinguish between gram-positive and gram-negative bacteria.

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
Phloxine B, a versatile bacterial stain
Reuven Rrasooly
Pathogens and Disease (2007)
Advances in measuring lifespan in the yeast Saccharomyces cerevisiae
Nadege Minios
Proceedings of the National Academy of Sciences of the USA (2004)
Using Vital Dyes to Trace Uptake of dsRNA by Green Peach Aphid Allows Effective Assessment of Target Gene Knockdown
International Journal of Molecular Sciences (2017)
Phloxine B Interacts with the Cystic Fibrosis Transmembrane Conductance Regulator at Multiple Sites to Modulate Channel Activity*210
Zhiwei Cai and David N. Sheppard
The Journal of Biological Chemistry (2002)
Ellyn E Ritchie et al.
Chemosphere, 90(7), 2129-2135 (2012-12-06)
Soil eco-toxicity testing was conducted in support of Canada's Chemical Management Plan (CMP) to fill data gaps for organic chemicals known to primarily partition to soil, and of which the persistence and inherent toxicity are uncertain. Two compounds representative of...
Separation of Tartrazine; Amaranth; Indigo carmine; New Coccine; Sunset Yellow FCF; Allura Red AC; Fast Green FCF; Erioglaucine disodium salt; Erythrosin B sodium salt; Phloxine B; Rose bengal
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