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Sulforhodamine 101
CAS 60311-02-6
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).
Chemical structure for Sulforhodamine 101.
Chemical structure for Sulforhodamine 101.
CatalogSize
Price
Quantity
7725 mg
Price
 
Physical properties

Molecular weight606.71
SolventWater
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
UNSPSC12171501
CAS60311-02-6
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Page updated on October 12, 2025