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Rhodamine 101 Chloride Salt *CAS 64339-18-0*

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Physical properties
Molecular weight490.59
Spectral properties
Excitation (nm)569
Emission (nm)590
Quantum yield0.11
Storage, safety and handling
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure
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Sulforhodamine 101 *CAS 60311-02-6*
5-Carboxyrhodamine 6G maleimide
Rhodamine aldehyde [5-TAMRA aldehyde]
Show More (46)


Molecular weight
Excitation (nm)
Emission (nm)
Quantum yield
Rhodamine dyes are used extensively in a variety of biological applications such as fluorescence microscopy, flow cytometry, fluorescence correlation spectroscopy and ELISA. Rhodamine 101 is one of the brightest fluorescent dyes. This rhodamine dye is often used a reference standard for 5-ROX or 6-ROX labeled bioconjugates.


Common stock solution preparation

Table 1. Volume of DMSO needed to reconstitute specific mass of Rhodamine 101 Chloride Salt *CAS 64339-18-0* to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.

0.1 mg0.5 mg1 mg5 mg10 mg
1 mM203.836 µL1.019 mL2.038 mL10.192 mL20.384 mL
5 mM40.767 µL203.836 µL407.672 µL2.038 mL4.077 mL
10 mM20.384 µL101.918 µL203.836 µL1.019 mL2.038 mL

Molarity calculator

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Spectral properties

Excitation (nm)569
Emission (nm)590
Quantum yield0.11

Product Family

NameExcitation (nm)Emission (nm)Quantum yield
Rhodamine 101 Inner Salt *CAS 116450-56-7*5695900.11



View all 32 references: Citation Explorer
Coherently-controlled two-dimensional photon echo electronic spectroscopy
Authors: Prokhorenko VI, Halpin A, Miller RJ.
Journal: Opt Express (2009): 9764
Lasing with well-defined cavity modes in dye-infiltrated silica inverse opals
Authors: Nishijima Y, Ueno K, Juodkazis S, Mizeikis V, Fujiwara H, Sasaki K, Misawa H.
Journal: Opt Express (2009): 2976
Validation of fluorescence quantum yields for light-scattering powdered samples by laser-induced optoacoustic spectroscopy
Authors: Tomasini EP, San Roman E, Braslavsky SE.
Journal: Langmuir (2009): 5861
Accurate determination of the limiting anisotropy of rhodamine 101. Implications for its use as a fluorescence polarization standard
Authors: Prazeres TJ, Fedorov A, Barbosa SP, Martinho JM, Berberan-Santos MN.
Journal: J Phys Chem A (2008): 5034
A mesoporous silica thin film as uptake host for guest molecules with retarded release kinetics
Authors: Suh M, Lee HJ, Park JY, Lee UH, Kwon YU, Kim DJ.
Journal: Chemphyschem (2008): 1402
Energy transfer from chemically attached rhodamine 101 to adsorbed methylene blue on microcrystalline cellulose particles
Authors: Rodriguez HB, Roman ES.
Journal: Photochem Photobiol (2007): 547
Mechanically tunable optofluidic distributed feedback dye laser
Authors: Li Z, Zhang Z, Scherer A, Psaltis D.
Journal: Opt Express (2006): 10494
Role of oxidative stress in the apoptosis of hepatocellular carcinoma induced by combination of arsenic trioxide and ascorbic acid
Authors: Li JJ, Tang Q, Li Y, Hu BR, Ming ZY, Fu Q, Qian JQ, Xiang JZ.
Journal: Acta Pharmacol Sin (2006): 1078
Interfacial behavior of sulforhodamine 101 at the polarized water/1,2-dichloroethane interface studied by spectroelectrochemical techniques
Authors: Nagatani H, Suzuki S, Fermin DJ, Girault HH, Nakatani K.
Journal: Anal Bioanal Chem (2006): 633
Comparison of tracer techniques for monitoring sewer losses
Authors: Revitt DM, Ellis JB, Paterakis N.
Journal: J Environ Monit (2006): 564