Phosphorous trichloride, also known as phosphorus (III) chloride, is a chemistry compound greatly used in the manufacturing of organophosphorus substance for chemical industry.

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Formula and also structure: The phosphorous trichloride chemistry formula is PCl3 and also its molar fixed is 137.33 g mol-1. The molecule is developed by the cation phosphorous and 3 anions chloride. The molecule has a geometry trigonal pyramidal due the repulsion caused by a lone pair that the phosphorous under the 3 chloride atoms. Its chemical structure have the right to be written as below, in the common representations supplied for necessary molecules.


Occurrence: Phosphorous trichloride is not found in nature. It is just obtain through organic synthesis.

Preparation: Phosphorous trichloride is mostly developed from the yellow or white phosphorous and also gas chlorine. The reaction additionally produces phosphorous pentachloride,however in order to protect against the development of PCl5 is added more phosphorous:

P4 + 6 Cl2 → 4 PCl3

Physical properties: Phosphorous trichloride is a yellow to colorless, liquid, through pungent and irritating odor. The melting and boiling allude are -93.6 ºC and also 76.1 ºC and its density is 1.574 g mL-1. Phosphorous trichloride reacts through water and ethanol and it is dissolve benzene, carbon tetrachloride, chloroform and ether.

Chemical properties: Phosphorous trichloride has an amazing chemical behavior. It deserve to suffer plenty of reactions and also being a electrophile and also nucleophile for promoting a good variety the reactions. It deserve to react through redox reaction to form other phosphorous compounds such as pentachloride, phosphoryl chloride or thiophosphoryl chloride. Since the lone pair the phosphorous it can act as nucleophile in some reactions, particularly with Lewis acids as AlCl3. Moreover, the phosphorous can accept an ext electrons, so the it can additionally be one electrophile.

Uses: Phosphorous trichloride is offered widely in chemistry industry, greatly in the manufacturing of pesticides, surfactants, gasoline additives, plastics, medicine products and textiles. It is also used in the production of various other phosphorous compounds such together phosphorous pentachloride, phosphoryl chloride or thiophosphoryl chloride. Moreover, phosphorous trichloride is likewise used as precursor and also intermediate of some chemical reactions together Wittig reaction.

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Health effects/safety hazards: Phosphorous trichloride can reason severe damages to skin, eyes and mucous membranes. It is fatal by ingestion, inhalation and also can be soaked up by skin. Additionally, this compounds reacts violently through water creating irritating fumes i beg your pardon are incredibly toxic. The is not flammable.

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