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Names | |
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Preferred IUPAC name
9-(2-Carboxyphenyl)-6-(diethylamino)-N,N-diethyl-3H-xanthen-3-iminium chloride | |
Other names
Rhodamine 610, C.I. Pigment Violet 1, Basic Violet 10, C.I. 45170
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Identifiers | |
3D model (
JSmol)
|
|
ChEBI | |
ChEMBL | |
ChemSpider | |
ECHA InfoCard | 100.001.259 |
KEGG | |
PubChem
CID
|
|
UNII | |
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
C28H31ClN2O3 | |
Molar mass | 479.02 |
Appearance | red to violet powder |
Melting point | 210 to 211 °C (410 to 412 °F; 483 to 484 K) (Decomposes) |
8 to 15 g/L (20 °C) [1] [nt 1] | |
Hazards | |
Safety data sheet (SDS) | MSDS |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Rhodamine B /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 fluorometers.
Rhodamine B is used in biology as a staining fluorescent dye, sometimes in combination with auramine O, as the auramine-rhodamine stain to demonstrate acid-fast organisms, notably Mycobacterium. Rhodamine dyes are also used extensively in biotechnology applications such as fluorescence microscopy, flow cytometry, fluorescence correlation spectroscopy and ELISA.[ citation needed]
Rhodamine B is often mixed with herbicides to show where they have been used. [2]
It is also being tested for use as a biomarker in oral rabies vaccines for wildlife, such as raccoons, to identify animals that have eaten a vaccine bait. The rhodamine is incorporated into the animal's whiskers and teeth. [3] Rhodamine B is an important hydrophilic xanthene dye well known for its stability and is widely used in the textile industry, leather, paper printing, paint, coloured glass and plastic industries. [4]
Rhodamine B (BV10) is mixed with quinacridone magenta (PR122) to make the bright pink watercolor known as Opera Rose. [5]
Rhodamine B can exist in equilibrium between two forms: an "open"/fluorescent form and a "closed"/nonfluorescent spirolactone form. The "open" form dominates in acidic condition while the "closed" form is colorless in basic condition. [6]
The fluorescence intensity of rhodamine B will decrease as temperature increases. [7]
The solubility of rhodamine B in water varies by manufacturer, and has been reported as 8 g/L and ~15 g/L, [1] while solubility in alcohol (presumably ethanol) has been reported as 15 g/L. [nt 1] Chlorinated tap water decomposes rhodamine B. Rhodamine B solutions adsorb to plastics and should be kept in glass. [8] Rhodamine B is tunable around 610 nm when used as a laser dye. [9] Its luminescence quantum yield is 0.65 in basic ethanol, [10] 0.49 in ethanol, [11] 1.0, [12] and 0.68 in 94% ethanol. [13] The fluorescence yield is temperature dependent; [14] the compound is fluxional in that its excitability is in thermal equilibrium at room temperature. [15]
In California, rhodamine B is suspected to be carcinogenic and thus products containing it must contain a warning on its label. [16] Cases of economically motivated adulteration, where it has been illegally used to impart a red color to chili powder, have come to the attention of food safety regulators. [17]
This is to be used as a guide only as solubility data varies between manufacturers for the same product, especially for dyes.Note that most sources simply indicate that the compound is water soluble without providing a g/L value.
![]() | |
Names | |
---|---|
Preferred IUPAC name
9-(2-Carboxyphenyl)-6-(diethylamino)-N,N-diethyl-3H-xanthen-3-iminium chloride | |
Other names
Rhodamine 610, C.I. Pigment Violet 1, Basic Violet 10, C.I. 45170
| |
Identifiers | |
3D model (
JSmol)
|
|
ChEBI | |
ChEMBL | |
ChemSpider | |
ECHA InfoCard | 100.001.259 |
KEGG | |
PubChem
CID
|
|
UNII | |
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
C28H31ClN2O3 | |
Molar mass | 479.02 |
Appearance | red to violet powder |
Melting point | 210 to 211 °C (410 to 412 °F; 483 to 484 K) (Decomposes) |
8 to 15 g/L (20 °C) [1] [nt 1] | |
Hazards | |
Safety data sheet (SDS) | MSDS |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Rhodamine B /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 fluorometers.
Rhodamine B is used in biology as a staining fluorescent dye, sometimes in combination with auramine O, as the auramine-rhodamine stain to demonstrate acid-fast organisms, notably Mycobacterium. Rhodamine dyes are also used extensively in biotechnology applications such as fluorescence microscopy, flow cytometry, fluorescence correlation spectroscopy and ELISA.[ citation needed]
Rhodamine B is often mixed with herbicides to show where they have been used. [2]
It is also being tested for use as a biomarker in oral rabies vaccines for wildlife, such as raccoons, to identify animals that have eaten a vaccine bait. The rhodamine is incorporated into the animal's whiskers and teeth. [3] Rhodamine B is an important hydrophilic xanthene dye well known for its stability and is widely used in the textile industry, leather, paper printing, paint, coloured glass and plastic industries. [4]
Rhodamine B (BV10) is mixed with quinacridone magenta (PR122) to make the bright pink watercolor known as Opera Rose. [5]
Rhodamine B can exist in equilibrium between two forms: an "open"/fluorescent form and a "closed"/nonfluorescent spirolactone form. The "open" form dominates in acidic condition while the "closed" form is colorless in basic condition. [6]
The fluorescence intensity of rhodamine B will decrease as temperature increases. [7]
The solubility of rhodamine B in water varies by manufacturer, and has been reported as 8 g/L and ~15 g/L, [1] while solubility in alcohol (presumably ethanol) has been reported as 15 g/L. [nt 1] Chlorinated tap water decomposes rhodamine B. Rhodamine B solutions adsorb to plastics and should be kept in glass. [8] Rhodamine B is tunable around 610 nm when used as a laser dye. [9] Its luminescence quantum yield is 0.65 in basic ethanol, [10] 0.49 in ethanol, [11] 1.0, [12] and 0.68 in 94% ethanol. [13] The fluorescence yield is temperature dependent; [14] the compound is fluxional in that its excitability is in thermal equilibrium at room temperature. [15]
In California, rhodamine B is suspected to be carcinogenic and thus products containing it must contain a warning on its label. [16] Cases of economically motivated adulteration, where it has been illegally used to impart a red color to chili powder, have come to the attention of food safety regulators. [17]
This is to be used as a guide only as solubility data varies between manufacturers for the same product, especially for dyes.Note that most sources simply indicate that the compound is water soluble without providing a g/L value.