Phosphorus Trichloride (PCl₃), CAS 7719-12-2, is also known as trichlorophosphine. It is a phosphorus(III) chloride used in inorganic and organophosphorus synthesis. For procurement review, confirm the intended reaction route, water-exclusion and handling controls, offered form, and current specification, packaging, and applicable safety documentation.
Product Description
Product name: Phosphorus Trichloride (PCl₃)
CAS number: 7719-12-2
Molecular formula: PCl₃
Molecular weight: 137.33 g/mol
EC number: 231-749-3
Other names: Phosphorus trichloride; PCl₃; Phosphorus(III) chloride; Trichlorophosphine
Chemical class: a phosphorus(III) chloride
Identity check: PCl₃ identifies phosphorus trichloride and is not phosphorus oxychloride (POCl₃).
Technical context: inorganic and organophosphorus synthesis
RFQ information: Before an RFQ, confirm the intended reaction route, water-exclusion and handling controls, offered form, and current specification.
Offered form: Not specified; confirm the actual offered form.
Specification review: Confirm identity, relevant assay or impurity criteria, and suitability in the current technical dossier.
Safety: Follow the current SDS for the exact offered form and the receiving site’s controls.
Packaging and documents: Confirm packaging and applicable documentation for the actual offered product.
FAQ - Technical & Supply Chain
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Q:
Are Phosphorus Trichloride, Phosphorus(III) Chloride and PCl₃ the same material?
A: Yes. These names identify CAS 7719-12-2 and formula PCl₃. Do not confuse Phosphorus Trichloride with Phosphoryl Chloride, POCl₃, or Phosphorus Pentachloride, PCl₅. The purchase specification, label and analytical release should use the full identity because those chlorides are distinct materials and may also appear as process impurities. -
Q:
Which specifications should be agreed for Phosphorus Trichloride?
A: Set assay and method, color, iron, Phosphoryl Chloride and other agreed phosphorus chloride impurities, plus water-reactivity or acidity-related controls appropriate to the process. Confirm whether the result is by titration, GC or another method. Compare the offered batch COA with the same specification and sampling basis. -
Q:
What must be agreed for bulk PCl₃ transport and unloading?
A: PCl₃ reacts strongly with water and releases corrosive fumes. Agree a dry compatible tank, valve, gasket and closed-transfer system, inert-gas conditions, seal controls and allowable moisture exposure. Before dispatch, the receiving site should approve the current SDS, transport classification, unloading connection, scrubber or vapor-control arrangement and emergency response procedure.
Ordering & Documentation
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