Rhodamine B
Description
A strong, bright red dye fluorescent dye. Rhodamine B is a dye basic dye that was developed in 1887 by Ceresole. It is used as textile and paper dye, as a pigment, and as a staining reagent for the detection of fats and oils. Some oil modified materials such as resin alkyds and urethanes will also stain with rhodamine (Wolbers et al 1990). Rhodamine B has been used as a fluorescent colorant in inks (ink ballpoint, ink printing), stain wood stains, distemper paints, and shoe polish.
Synonyms and Related Terms
Basic Violet 10; CI 45170; tetraethylrhodamine; D&C Red No. 19, Solvent Red 49; Pigment Violet 1 (phosphotungstomolybdic acid salt); Pigment Red 169 (copper ferrocyanide salt); Pigment Red 173 (aluminum salt); Rhodamine (Deut.); Rodamina B (Esp.); rodamina B (Port.); rhodamine B (Fr.);
Other Properties
Green crystals or violet powder. Soluble in water, ethanol, polar solvents.
Maximum absorption wavelength = 545 nm.
Maximum emission wavelength = 625 nm.
| Composition | C28H31ClN2O3 |
|---|---|
| CAS | 81-88-9 |
| Melting Point | 210-211 |
| Molecular Weight | mol. wt. = 478.68 |
Hazards and Safety
Carcinogen. Mutagen.
Mallinckrodt Baker: MSDS
Additional Information
R. Wolbers, N. Sterman and C. Stavroudis, "Notes for Workshop on New Methods in the Cleaning of Paintings", 1990, GCI, Los Angeles. Website for absorption/fluorescent spectra: http://www.omlc.ogi.edu/spectra/PhotochemCAD/html/rhodamineB.html
Additional Images
Infrared spectrum of Rhodamine B
Absorption and fluorescence emission spectra
Authority
- Reed Kay, Reed Kay, The Painter's Guide To Studio Methods and Materials, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1983
- Richard S. Lewis, Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Richard C. Wolbers, Nanette T. Sterman, Chris Stavroudis, Richard C. Wolbers, Nanette T. Sterman, Chris Stavroudis, Notes for Workshop on New Methods in the Cleaning of Paintings, J.Paul Getty Trust, Los Angeles, 1990
- Monona Rossol, Monona Rossol, The Artist's Complete Health and Safety Guide, Allworth Press, New York, 1994
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8349
- Website address 1, Website address 1 Comment: www.straw.com/sig/dyehist - discovered 1887
- Aldrich Chemical Catalog Comment: p. 1299
- Colour Index International online at www.colour-index.org