|
PIPERONAL (heliotropine, protocatechuic aldehyde methylene See also: Fittig, See also: Ann., 1869, 152, p
.
35); by condensing methylene iodide with protocatechuic aldehyde (R
.
Wegscheider, Monats., 1893, 14, p
.
388) ; or by oxidizing isosafrol with chromic acid
.
It forms long colourless crystals which melt at 370 C. and See also: boil at 263° C
.
It has an agreeable smell, resembling that of See also: heliotrope, and is much used in perfumery
.
It is only slightly soluble in cold See also: water, but is readily soluble in See also: alcohol and in See also: ether
.
When heated with dilute hydrochloric acid to Zoo° C. it yields protocatechuic aldehyde, C7H6O3, and See also: carbon
.
It readily combines with sodium bisulphite and with various bases (See also: ammonia, aniline, methylamine, &c.)
.
|
|
|
[back] PIPERNO (anc. Privernum) |
[next] PIPIT (cognate with the Lat. Pipio; see PIGEON) |
There are no comments yet for this article.
Do not copy, download, transfer, or otherwise replicate the site content in whole or in part.
Links to articles and home page are encouraged.