Fuchsine basic (25gr)
Fuchsine basic (25gr)
25g
Fuchsine (sometimes spelled fuchsin) or rosaniline hydrochloride is a magenta dye with chemical formula C20H19N3·HCl. There are other similar chemical formulations of products sold as fuchsine, and several dozen other synonyms of this molecule.
It becomes magenta when dissolved in water; as a solid, it forms dark green crystals. As well as dying textiles, fuchsine is used to stain bacteria and sometimes as a disinfectant. In the literature of biological stains the name of this dye is frequently misspelled, with omission of the terminal -e, which indicates an amine. American and English dictionaries (Webster’s, Oxford, Chambers, etc.) give the correct spelling, which is also used in the literature of industrial dyeing.[4] It is well established that production of fuchsine results in development of bladder cancers by production workers. Production of magenta is listed as a circumstance known to result in cancer.
Chemical properties
Properties | |
---|---|
C20H19N3·HCl | |
Molar mass | 337.86 g/mol (hydrochloride) |
Appearance | Dark green powder |
Melting point | 200 °C (392 °F; 473 K) |
2650 mg/L (25 °C (77 °F)) | |
log P | 2.920 |
Vapor pressure | 7.49×10−10 mmHg (25 °C) |
Henry’s law constant (kH) | 2.28×10−15 atm⋅m3/mole (25 °C) |
Atmospheric OH rate constant | 4.75×10−10 cm3/molecule⋅sec (25 °C) |
Chemical Structure Fuchsine basic (25gr)
Safety
Description
Basic fuchsine is a mixture of rosaniline, pararosaniline, new fuchsine and Magenta II. Formulations usable for making of Schiff reagent must have high content of pararosanilin. The actual composition of basic fuchsine tends to somewhat vary by vendor and batch, making the batches differently suitable for different purposes.
In solution with phenol (also called carbolic acid) as an accentuator[15] it is called carbol fuchsin and is used for the Ziehl–Neelsen and other similar acid-fast staining of the mycobacteria which cause tuberculosis, leprosy etc.[16] Basic fuchsine is widely used in biology to stain the nucleus, and is also a component of Lactofuchsin, used for Lactofuchsin mounting.