. Biological stains, a handbook on the nature and uses of the dyes employed in the biological laboratory. Stains and staining (Microscopy). their chromophore. For this reason one of the quinoid formulae seems preferable; and for the sake of uniformity the paraquinoid form will be given in the following pages. It must be remembered, however, that the other formulae are equally admissable; and it is possible that the compound occurs in two or even all three of the different forms. PYROXIN G c. I. NO. 739 CH, CH, \ I / N. CH3 / _X—CH3 "I CI {A basic dye; absorption maximum about 5^5.) This d
. Biological stains, a handbook on the nature and uses of the dyes employed in the biological laboratory. Stains and staining (Microscopy). their chromophore. For this reason one of the quinoid formulae seems preferable; and for the sake of uniformity the paraquinoid form will be given in the following pages. It must be remembered, however, that the other formulae are equally admissable; and it is possible that the compound occurs in two or even all three of the different forms. PYROXIN G c. I. NO. 739 CH, CH, \ I / N. CH3 / _X—CH3 "I CI {A basic dye; absorption maximum about 5^5.) This dye finds its principal use as a stain in the Pappenheim combination, where it is employed with methyl green for staining basophile elements, especialty the mast cells, and for staining the gonococcus in smears of pus. It is also used sometimes as a counter stain in the Gram technic for bacteria; and by Ehrlich as a com- ponent of certain "neutral" stains. Since the war it has proved difficult to obtain this dye in America except by importation, as the intermediate from which it is manufactured is very difficult to prepare and is not produced in this country.* 3 ^^^2 \ N PYRONIX B C. I. NO. 741 O /\_N—CH. •CH3 3 '-'^^2. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Conn, H. J. (Harold Joel), 1886-1975; Ambler, Joseph Alfred, 1889-; Kornhauser, S. I. (Sidney Isaac), 1887-1959; Mallory, Frank Burr, 1862-1941; Sharp, Lester W. (Lester Whyland), b. 1887. Geneva, N. Y. , The Commission
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