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Sulforhodamine 101 *CAS 60311-02-6*

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Physical properties
Molecular weight606.71
Spectral properties
Absorbance (nm)573
Correction Factor (260 nm)0.24
Correction Factor (280 nm)0.21
Extinction coefficient (cm -1 M -1)139000
Excitation (nm)578
Emission (nm)593
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, sodium salt
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Phalloidin-Tetramethylrhodamine Conjugate
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6-dR6G [6-Carboxy-4,7-dichlororhodamine 6G]
5-dR110 [5-Carboxy-4,7-dichlororhodamine 110]
6-dR110 [6-Carboxy-4,7-dichlororhodamine 110]
Bis-L-Aspartic acid Beta-rhodamine 110
Bis-Arg-rhodamine 110
5-Carboxyrhodamine 6G maleimide
Rhodamine aldehyde [5-TAMRA aldehyde]
Show More (45)


Molecular weight
Absorbance (nm)
Correction Factor (260 nm)
Correction Factor (280 nm)
Extinction coefficient (cm -1 M -1)
Excitation (nm)
Emission (nm)
Sulforhodamine 101 is a fluorescence reference standard for measuring fluorescence quantum yield. It is also the key precursor used for preparing rhodamine 101 sulfonyl chloride (also called Texas Red®, a trademark of Molecular Probes).


Common stock solution preparation

Table 1. Volume of Water needed to reconstitute specific mass of Sulforhodamine 101 *CAS 60311-02-6* 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 mM164.823 µL824.117 µL1.648 mL8.241 mL16.482 mL
5 mM32.965 µL164.823 µL329.647 µL1.648 mL3.296 mL
10 mM16.482 µL82.412 µL164.823 µL824.117 µL1.648 mL

Molarity calculator

Enter any two values (mass, volume, concentration) to calculate the third.

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Spectral properties

Absorbance (nm)573
Correction Factor (260 nm)0.24
Correction Factor (280 nm)0.21
Extinction coefficient (cm -1 M -1)139000
Excitation (nm)578
Emission (nm)593

Product Family

NameExcitation (nm)Emission (nm)
Sulforhodamine B *CAS 3520-42-1*559577
Sulforhodamine G *CAS 5873-16-5*531552



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