Used as a Wittig reagent in organic synthesis to convert aldehydes and ketones into alkenes. It is particularly effective for introducing an ethyl-substituted styrene moiety, enabling the construction of extended conjugated systems. This makes it valuable in the synthesis of pharmaceuticals, agrochemicals, and functional materials where precise alkene geometry is required. The chloride salt offers good stability and ease of handling, making it suitable for laboratory-scale and exploratory reactions.