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Rhodamine B
CAS 81-88-9
Rhodamine B (also called Rhodamine 610, Basic Violet 10, or C.I. 45170) is used as a fluorescent staining dye, sometimes in combination with auramine O. The auramine-rhodamine stain is used to demonstrate acid-fast organisms, notably Mycobacterium; Rhodamine B is tunable around 610 nm when used as a laser dye.
Chemical structure for Rhodamine B *CAS 81-88-9*
Chemical structure for Rhodamine B *CAS 81-88-9*
CatalogSize
Price
Quantity
69100 mg
Price
 
Physical properties

Molecular weight479.01
SolventDMSO
Spectral properties

Absorbance (nm)541
Extinction coefficient (cm -1 M -1)
106000
1
Excitation (nm)546
Emission (nm)567
Quantum yield
0.7
1
0.43
2
Storage, safety and handling

Certificate of OriginDownload PDF
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure
UNSPSC12171501
CAS81-88-9
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Page updated on September 23, 2025