phenosafranine Chem.
(fiːnəˈsæfrəniːn, -ɪn)
Formerly also -in.
[ad. G. phenosafranin (O. N. Witt: see R. Nietzki in Ber. d. Deut. Chem. Ges. (1883) XVI. 466), f. pheno- pheno- + safranin safranin.]
A synthetic red dye, C18H15N4Cl, which is used in photography as a desensitizer; also, any of the derivatives of this compound.
| 1883 Jrnl. Chem. Soc. XLIV. 731 Phenosafranine,..obtained by Witt by oxidising a mixture of aniline (2 mols.) and paraphenylenediamine (1 mol.).., forms beautifully crystalline salts. 1921 [see desensitize v.]. 1937 Thorpe's Dict. Appl. Chem. (ed. 4) I. 571/2 Nietzki showed that the same phenosafranine may be obtained (a) by condensing phenyl-m-phenylenediamine with phenyl-p-phenylenediamine, or (b) from diphenyl-m-phenylenediamine..and p-phenylenediamine. 1970 Amat. Photographer 11 Mar. 63/3 The phenosafranines and allied desensitising dyes are not suitable for papers as they stain badly. |