Rhodamine B

IUPAC name: 9-(2-carboxyphenyl)-3,6-bis(diethylamino)xanthylium chloride
Alternative names: C.I. Basic Violet 10; C.I. Food Red 15; C.I. 45170; Basazol Red 71 L; Basic Red RB; Basonyl Red 540; Basonyl Red 545; Certiqual Rhodamine; Conbasic Violet AO; Flexo Red 540; Flexo Red 547; Futramine D; Geranium Lake N; Libbase Rhodamine LB 500; Peltol D; Rhodamine B; Rhodamine B Extra; Rhodamine BT; Rhodamine BX; Rhodamine U; Sepisol Fast Red SB; Tetraethylrhodamine, hydrochloride; Ultrasol Red B; Violet B; Violet Zasadita 10; (9-(o-Carboxyphenyl)-6-(diethyl amino)-3H- xanthen-3-ylidene) diethylammonium chloride; 9-(2-Carboxyphenyl)-3,6-bis(diethylamino) xanthylium chloride; 9-o-Carboxyphenyl-6-diethylamino-3-ethylimino-3-isoxanthene, 3-ethochloride; Diethyl-m-aminophenolphthalein hydrochloride; Ethanaminium, N-[9-(2-carboxyphenyl)-6-(diethylamino)-3H-xanthen-3-ylidene]-N-ethyl-, chloride; N-[9-(2-carboxyphenyl)-6-(diethylamino)- 3H-xanthen-3- ylidene]- N-ethyl- Ethanaminium chloride; Tetraethyldiamino-o-carboxyphenyl xanthenyl chloride; Xanthylium, 9-(2-carboxyphenyl)-3,6-bis(diethylamino)-, chloride

General description of the product

Molecular formula: C28H11ClN2O3
Molar weight: 479,017 g/mol
CAS number: 81-88-9
EC number: 201-383-9
ECHA Infocard: 26187
PubChem: 6694
ChemSpider: 6439
Rhodamine B molecular structure
Rhodamine B is an organic compound and a fluorescent dye. It is often used as a tracer dye within water to determine the rate and direction of flow and transport. As it 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. It is also often mixed with herbicides to show where they have been used. It is also used as fishers' bait as the colour invites the fishes. Rhodamine B well soluble in water, solubility is ca. 50 g/l, while the solubility in 30% acetic acid solution is ca. 400 g/l. Chlorinated tap water decomposes Rhodamine B. The solution of Rhodamine B adsorbs to plastics and should be kept in glass. It has got wide absorption spectrum between 460-590 nm, the maximum is at 542 nm. Emission spectrum is 550-680 nm, the maximum is at 590 nm.
Rhodamine B, 540% in visible light Rhodamine B, 540% in UV light


Property Specification Unit
Appearance Green powder
Tinting strength 100,0 ± 2 %
Shade(drawdown) Similar to standard
Rhodamine B, 540%


Classification according to European Regulation (EC) No 1272/2008
Acute toxicity, oral Class 4
Serious eye damage/irritation Class 1
Hazardous to the aquatic environment - chronic hazard Class 3
Warning pictogram Corrosive pictogram
Labelling according to Regulation (EC) No 1272/2008 (CLP)
Hazard statements
H302 - Harmful if swallowed.
H318 - Causes serious eye damage.
H412 - Harmful to aquatic life with long lasting effects.
Precautionary statements
P280 - Wear protective eye protection/face protection.
P273 - Avoid release to the environment.
P305+P351+P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P301+P312 - IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell.
P260 - Do not breathe dust.
P330 - Rinse mouth.
Information regarding to transport
The product is not classified as dangerous for transport.
Rodamin B, 500% 50 g package
Rodamin B, 500% 100 g package
Rodamin B, 500% 1 kg package

Other information

Customs tariff number: 3204130090
Article number: 94602923 (50 g/bottle)
Article number: 94602930 (100 g/bottle)
Article number: 94602947 (1 kg/bottle)
Article number: 94602827 (5-25 kg/carton box)


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