5-ROX [5-Carboxy-X-rhodamine] *CAS 216699-35-3*

5-ROX

5-Carboxy-X-rhodamine; CAS 216699-35-3

5-ROX is the purified single isomer of 5(6)-ROX. It is preferred for some complicated biological applications where reproducibility is more critical than material cost since the minor positional difference between 5-ROX and 6-ROX might significantly affect some biological properties of the underlying conjugates. 5-ROX is predominantly used to label peptides and proteins. Currently AAT Bioquest is using a proprietary process to synthesize isomer-free 5-ROX without the conventional chromatographic purification. Cautions must be exercised to prevent the deterioration during storage.

Protocol

COA

Catalog	Size	Price	Quantity
381	5 g	Price
385	25 mg	Price

Calculators

Common stock solution preparation

Table 1. Volume of DMSO needed to reconstitute specific mass of 5-ROX [5-Carboxy-X-rhodamine] *CAS 216699-35-3* to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.

	0.1 mg	0.5 mg	1 mg	5 mg	10 mg
1 mM	187.056 µL	935.279 µL	1.871 mL	9.353 mL	18.706 mL
5 mM	37.411 µL	187.056 µL	374.111 µL	1.871 mL	3.741 mL
10 mM	18.706 µL	93.528 µL	187.056 µL	935.279 µL	1.871 mL

Molarity calculator

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

Mass (Calculate)		Molecular weight		Volume (Calculate)		Concentration (Calculate)		Moles
mg	÷	534.6 g/mol	=	mL	x	mM	=	mmol

References

View all 11 references: Citation Explorer

Four-color DNA sequencing by synthesis on a chip using photocleavable fluorescent nucleotides

Authors:

Seo TS, Bai X, Kim DH, Meng Q, Shi S, Ruparel H, Li Z, Turro NJ, Ju J.

Journal:

Proc Natl Acad Sci U S A (2005): 5926

Evaluation of surface-enhanced resonance Raman scattering for quantitative DNA analysis

Authors:

Faulds K, Smith WE, Graham D.

Journal:

Anal Chem (2004): 412

Photocleavable fluorescent nucleotides for DNA sequencing on a chip constructed by site-specific coupling chemistry

Authors:

Seo TS, Bai X, Ruparel H, Li Z, Turro NJ, Ju J.

Journal:

Proc Natl Acad Sci U S A (2004): 5488

Adsorption of oligonucleotides on PMMA/PNIPAM core-shell latexes: polarity of the PNIPAM shell probed by fluorescence

Authors:

Prazeres TJ, Santos AM, Martinho JM, Elaissari A, Pichot C.

Journal:

Langmuir (2004): 6834

Blue light-induced generation of reactive oxygen species in photoreceptor ellipsoids requires mitochondrial electron transport

Authors:

Yang JH, Basinger SF, Gross RL, Wu SM.

Journal:

Invest Ophthalmol Vis Sci (2003): 1312

Physical properties

Molecular weight	534.60
Solvent	DMSO

Spectral properties

Correction factor (280 nm)	0.168
Extinction coefficient (cm ^-1 M ^-1)	82000
Excitation (nm)	578
Emission (nm)	604
Quantum yield	0.94 ¹

Storage, safety and handling

H-phrase	H303, H313, H333
Hazard symbol	XN
Intended use	Research Use Only (RUO)
R-phrase	R20, R21, R22
Storage	Freeze (< -15 °C); Minimize light exposure
UNSPSC	12171501
CAS	216699-35-3

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Page updated on October 13, 2025