safranine การใช้

• Other aniline dyes followed, such as fuchsine, safranine, and induline.
• In 1879, Perkin showed mauveine B related to safranines by phenazinium salt, whereas the parasafranine produced by Perkin is presumed to be the 1, 8-( or 2, 9 ) dimethyl isomer.
• Gram-negative bacteria, which have thinner but more complex and less permeable cell walls, do not retain the purple dye, but take up another one, safranine, and end up a dark pink.
• In commerce, three brands of aniline are distinguished : aniline oil for blue, which is pure aniline; aniline oil for red, a mixture of equimolecular quantities of aniline and ortho-and para-toluidines; and aniline oil for safranine, which contains aniline and ortho-toluidine, and is obtained from the distillate ( 閏happ閟 ) of the fuchsine fusion.