Crossword-Solution: PARAROSANILINE
We have 1 clue for the answer “PARAROSANILINE”
| Clue | Answers |
|---|---|
| a white crystalline base that is the parent compound of many dyes | 1 answer |
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Dermatological complaint
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Hint 1 meaning
An inflammatory disease of the skin, characterized by the
presence of redness and itching, an eruption of small vesicles, and the
discharge of a watery exudation, which often dries up, leaving the skin
covered with crusts; -- called also tetter, milk crust, and salt rheum.
Hint 2 anagram
ECEMZA
Hint 3 another clue
eruption
11 +2
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Sentences with PARAROSANILINE (5)
These dye-stuffs are derived from a number of so-called colour bases, such as Rosaniline, Pararosaniline, Methylrosaniline, Phenyl-rosaniline, and Auramine base.
FUCHSINE, or MAGENTA, a red dye-stuff consisting of a mixture of the hydrochlorides or acetates of pararosaniline and rosaniline.
Pararosaniline was reduced to the corresponding leuco compound (paraleucaniline), from which by diazotization and boiling with alcohol, the parent hydrocarbon was obtained (H2N·C5H4)2C : C6H4:NH2Cl --> HC(C6H4NH2·HCl)3 --> HC(C6H4N2Cl3) Pararosaniline hydrochloride.
The free pararosaniline, C19H19N3O, and rosaniline, C20H21N3O, may be obtained by precipitating solutions of their salts with a caustic alkali, colourless precipitates being obtained, which crystallize from hot water in the form of needles or plates.
The third is also in the para position; for if benzaldehyde be condensed with aniline, condensation occurs in the para position, for the compound formed may be converted into para-dioxybenzophenone, C6H5CHO --> C6H5CH(C6H4NH2)2 --> C6H5CH(C6H4OH)2 --> CO(C6H4OH)2; but if para-nitrobenzaldehyde be used in the above reaction and the resulting nitro compound NO2.C6H4.CH(C6H4NH2)2 be reduced, then pararosaniline is the final product, and consequently the third amino group occupies the para position.