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(organic chemistry)
C6H4OHCHO Clear to dark-red oily liquid, with burning taste and almond aroma; soluble in alcohol, benzene, and ether, very slightly soluble in water; boils at 196°C; used in analytical chemistry, in perfumery, and for synthesis of chemicals. Also known as helicin.



(o-hydroxybenzaldehyde), a colorless liquid with a bitter almond odor and a burning taste. Boiling point, 196.8°C; density, 1.167 g/cm3 at 20°C. Salicylaldehyde is miscible in all proportions with ethanol and ether and is readily soluble in benzene.

Salicylaldehyde is found in shrubs of the genus Spiraea. It is usually produced from phenol by the action of chloroform in the presence of an alkali base. It is used in the production of coumarin, saligenin, and salicylaldoxime (an important analytical reagent), and also in analytical chemistry—for example, to detect hydrazine.

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The industrial and technological applications of chitosan have been exploited for decades, for example, in the production of cosmetics, drugs, and medicines, food additives, semipermeable membranes, in the development of biomaterials used in Schiff base reactions to produce salicylaldehyde derivatives [1], as a drug delivery agent for the human body [2, 3], and in the textile industry as an alternative for treating effluents containing dyes [4].
In order to investigate these potential properties, four new Schiff base phenoxyimine (PHI) ligands were synthesized from the Schiff base condensation reaction between substituted salicylaldehyde and substituted aniline: 1) ligandl: N-(salicylidene)-3,5-dichloroaniline ([L.
Synthesis and characterization of Schiff bases from chitosan and salicylaldehyde derivatives.
Various theories exist to explain this name, the more logical being that Spirea is the genus name for the herb meadowsweet, the source of salicylaldehyde.
For example salicin is found in Salix spp, Populus spp, Viola spp, and Viburnum spp; fraxin is found in Fraxinus spp; and both spiraein and salicylaldehyde are found in Filipendula spp.
One of the most widely used ligand classes are C2-symmetric salens, double Schiff base derivatives from chiral, vicinal diamines and two salicylaldehyde units.
In this connection, a known coumarin derivative (3-carbethoxycoumarin) was synthesized by reacting for a few minutes salicylaldehyde and diethyl malonate in presence of sodium acetate and acetic anhydride in a microwave oven.
Secreted from surface glands by the beetle larvae, salicylaldehyde deters ants and probably other arthropod predators such as wasps from attacking the larvae, say the researchers.
N-(4-n-alkyloxy salicylidene) 4'-n-alkoxyanilines obtained by the 1:1 condensation of 4-n-alkyloxy salicylaldehyde and 4-n-alkoxyanilines viz.
Salicylaldehyde gave the 5-nitro derivative of 70% (HN[O.