Rhodamine 6G
Other names	Rhodamine 590, R6G, Rh6G, C.I. Pigment Red 81, C.I. Pigment Red 169, Basic Rhodamine Yellow , C.I. 45160
Identifiers
CAS number	989-38-8
Properties
Molecular formula	C28H31N2O3Cl
Molar mass	479.02 g/mol
Appearance	dark reddish purple, brown or black crystalline solid
Density	1.26 g/cm3
Solubility in water	20 g/l (25 °C)
Solubility in methanol	400 g/l
Hazards
MSDS	External MSDS
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Rhodamine 6G (pronounced /ˈroʊdəmiːn/) is a chemical compound and a dye. It is often used as a tracer dye within water to determine the rate and direction of flow and transport. Rhodamine dyes fluoresce and can thus be detected easily and inexpensively with instruments called fluorometers. Rhodamine dyes are used extensively in biotechnology applications such as fluorescence microscopy, flow cytometry, fluorescence correlation spectroscopy and ELISA.

Rhodamine 6G Chloride powder mixed with methanol, emitting yellow light under green laser illumination

Rhodamine 6G-based dye laser. The dye solution is the orange fluid in the tubes

Rhodamine 6G is also used as a laser dye^[1][2], and is pumped by the 2nd (532 nm) harmonic from an Nd:YAG laser or nitrogen laser. The dye has a remarkably high photostability, high quantum yield (0.95 ^[3]), low cost, and its lasing range has close proximity to its absorption maximum (approximately 530 nm). The lasing range of the dye is 555 to 585 nm with a maximum at 566 nm ^[4].

Rhodamine 6G usually comes in three different forms. Rhodamine 6G chloride is a bronze/red powder with the chemical formula C₂₇H₂₉ClN₂O₃. Although highly soluble, this formulation is very corrosive to all metals except stainless steel. Other formulation are less soluble, but also less corrosive. Rhodamine 6G Perchlorate, (C₂₇H₂₉ClN₂O₇), comes in the form of red crystals, while rhodamine 6G tetrafluoroborate, (C₂₇H₂₉BF₄N₂O₃), appears as maroon crystals.^[5]

[edit] Solubility

Butanol (40 g/l), Ethanol (80), Methanol (400), Propanol (15), MEG (50), DEG ( 100), TEG (100), Isopropanol (15), Ethoxyethanol (25), Methoxyethanol (50), Dipropylene glycol (30), PEG (20) ^[6].

[edit] See also

• Rhodamine
• Rhodamine B
• Dye laser

[edit] References