5-Carboxytetramethylrhodamine could be utilized as a fluorescent probe for nucleic acids and proteins. The maximum excitation wavelength of 5-Carboxytetramethylrhodamine is 558 nm and the maximum emission wavelength is 586 nm.

Physicochemical Properties

Molecular Formula	C25H22N2O5
Molecular Weight	430.45
Exact Mass	430.152
CAS #	150322-05-7
PubChem CID	4612276
Appearance	Brown to breen solid powder
LogP	3.727
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	7
Rotatable Bond Count	3
Heavy Atom Count	32
Complexity	723
Defined Atom Stereocenter Count	0
InChi Key	DCVXPZDNLDPUES-UHFFFAOYSA-N
InChi Code	InChI=1S/C25H22N2O5/c1-26(2)15-6-9-19-21(12-15)31-22-13-16(27(3)4)7-10-20(22)25(19)18-8-5-14(23(28)29)11-17(18)24(30)32-25/h5-13H,1-4H3,(H,28,29)
Chemical Name	3',6'-bis(dimethylamino)-3-oxospiro[2-benzofuran-1,9'-xanthene]-5-carboxylic acid
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

References

[1]. Steric-Free Bioorthogonal Labeling of Acetylation Substrates Based on a Fluorine-Thiol Displacement Reaction. J Am Chem Soc. 2021 Jan 27;143(3):1341-1347. [2]. Rhodamine-Hoechst positional isomers for highly efficient staining of heterochromatin. Chem Sci. 2018 Dec 12;10(7):1962-1970. [3]. A tetramethyl rhodamine (Tamra) phosphoramidite facilitates solid-phase-supported synthesis of 5'-Tamra DNA. J Org Chem. 2000 Dec 29;65(26):9033-8.

Solubility Data

Solubility (In Vitro)

DMSO: 12.5 mg/mL (29.04 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 1.25 mg/mL (2.90 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 12.5 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: ≥ 1.25 mg/mL (2.90 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 12.5 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	2.3232 mL	11.6158 mL	23.2315 mL
	5 mM	0.4646 mL	2.3232 mL	4.6463 mL
	10 mM	0.2323 mL	1.1616 mL	2.3232 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.