Choline hydroxide

It is hygroscopic and thus often encountered as a colorless viscous hydrated syrup that smells of trimethylamine (TMA).

The cation of this salt, choline, occurs in nature in living beings.

[8] Choline hydroxide is used in industry as a pH regulating agent[1] and as an eco-friendly, biodegradable, recyclable and efficient catalyst with high yields for synthesis of certain organic compounds (2-amino-3-nitro-4H-chromene derivatives) in an aqueous solution at room temperatures.

[2] Choline hydroxide irritates skin, eyes and respiratory system.

Inhalation of this chemical may cause dyspnea and corrosive injuries to upper respiratory system and lungs, which can lead to pneumonia.

Choline hydroxide
NFPA 704 four-colored diamond Health 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gas Flammability 0: Will not burn. E.g. water Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen Special hazards (white): no code
A chemical reaction of various salicylaldehydes (2-hydroxybenzaldehydes) with ( E )- N -methyl-1-(methylthio)-2-nitroethenamine, in the presence of a basic ionic liquid catalyst such as choline hydroxide, at room temperature in an aqueous medium, produces 2-amino-3-nitro-4 H -chromene derivatives ( yields up to 83-96%). [ 2 ]