Phosphorus Trichloride CAS 7719-12-2

What Phosphorus Trichloride Is

Phosphorus trichloride (PCl3) is an inorganic phosphorus halide, a colorless liquid that fumes in moist air. It reacts violently with water to release hydrogen chloride, so it must stay dry and mixes only with anhydrous solvents. It chlorinates alcohols and acids into chlorides and acid chlorides and builds phosphite esters. UATChem supplies industrial grade in sealed steel drums, with assay on the COA and full detail in the SDS.

Agrochemical, Industrial and Water Treatment Uses

• Organophosphorus agrochemicals. A core intermediate in routes to organophosphorus insecticides and herbicides, including phosphite based crop protection chemistry.
• Pharmaceutical and dye intermediates. A chlorinating agent for drug and dye intermediate synthesis, converting alcohols to alkyl chlorides and carboxylic acids to acid chlorides.
• Flame retardants and plasticizers. The feedstock for phosphite ester based phosphorus flame retardants and plasticizers.
• Water treatment chemicals. A starting material for phosphonate scale and corrosion inhibitors, and a precursor to related phosphorus chlorides and phosphorous acid derivatives.

Typical Specifications

Industrial grades differ in assay and free phosphorus, reported on the COA for each lot; the table below identifies the material.

Packaging, Safety, Documents and Ordering

• Packed in 25 kg and 200 kg sealed steel drums, matching the drum photos on the page. Drums are kept dry, tightly closed and stored away from water, moisture, bases, oxidizers and food goods, under ventilated conditions.
• Phosphorus trichloride ships as dangerous goods under UN 1809 (toxic and corrosive, releasing hydrogen chloride on contact with water). Full classification, labeling and handling follow the SDS, and UATChem supports export with COA, TDS, SDS and the required dangerous goods paperwork.
• For a quote, UATChem needs the quantity, packing and destination port so the compliant dangerous goods shipping route can be confirmed.

FAQ

Q: What happens when phosphorus trichloride meets water?

A: On contact with water it releases hydrogen chloride, so phosphorus trichloride must stay dry, sealed and away from moisture.

Q: What is phosphorus trichloride used for?

A: It is a chlorinating and phosphiting intermediate for pesticides, pharmaceuticals, dyes, flame retardants and water treatment.

Q: How is phosphorus trichloride packed and shipped?

A: It ships in sealed dry 25 kg and 200 kg steel drums under UN 1809, with COA, TDS, SDS and dangerous goods export documents.