Basic Blue 20 is a DNA dye that emits red light and is quite handy. Basic Blue 20 has relatively narrow excitation and emission spectra, with peaks at 633 and 677 nm, respectively. Additionally, Basic Blue 20 exhibits high photobleaching resistance.

Physicochemical Properties

Molecular Formula	C26H33CL2N3
Molecular Weight	458.47
Exact Mass	457.205
CAS #	82-94-0
PubChem CID	6727
Appearance	Brown to black solid powder
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	4
Heavy Atom Count	31
Complexity	625
Defined Atom Stereocenter Count	0
InChi Key	DWCZIOOZPIDHAB-UHFFFAOYSA-L
InChi Code	InChI=1S/C26H33N3.2ClH/c1-27(2)23-14-8-20(9-15-23)26(21-10-16-24(17-11-21)28(3)4)22-12-18-25(19-13-22)29(5,6)7;;/h8-19H,1-7H3;2*1H/q+2;;/p-2
Chemical Name	[4-[[4-(dimethylamino)phenyl]-(4-dimethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)methyl]phenyl]-trimethylazanium;dichloride
Synonyms	Basic Blue 20
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 Note: Please store this product in a sealed and protected environment (e.g. under nitrogen), avoid exposure to moisture and light.
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]. A fast, low cost, and highly efficient fluorescent DNA labeling method using methyl green. Histochem Cell Biol. 2014;142(3):335-345.

Additional Infomation

Methyl green is an iminium salt composed of (4-{[4-(dimethylamino)phenyl][4-(trimethylazaniumyl)phenyl]methylidene}cyclohexa-2,5-dien-1-ylidene)(dimethyl)ammonium and chloride ions in a 1:2 ratio. A histological dye used to demonstrate nucleic acids by the Unna-Pappenheim stain, in conjunction with Pyronin Y. It has a role as a fluorochrome and a histological dye. It is an organic chloride salt, an iminium salt and a quaternary ammonium salt. It contains a methyl green(2+). A tri-benzene-ammonium usually compounded with zinc chloride. It is used as a biological stain and for the dyeing and printing of textiles.

Solubility Data

Solubility (In Vitro)

DMSO : ~125 mg/mL (~272.7 mM) H2O : ~4.7 mg/mL (~10.3 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.08 mg/mL (4.54 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 20.8 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: ≥ 2.08 mg/mL (4.54 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 20.8 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	2.1812 mL	10.9058 mL	21.8117 mL
	5 mM	0.4362 mL	2.1812 mL	4.3623 mL
	10 mM	0.2181 mL	1.0906 mL	2.1812 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.