Triphosgene

Triphosgene

CAS Number:32315‑10‑9

Synonyms:Triphosgene; Bis(trichloromethyl) carbonate; BTC; Solid phosgene

Chemical Formula:C₃Cl₆O₃

Molecular Weight:296.75 g/mol

Product Introduction

A white to off‑white crystalline solid with a faint phosgene-like odor. A crystalline, stable solid (up to ~200 °C) used as a safer, easy-to-handle substitute for phosgene gas in carbonylation and chloroformate/isocyanate formation reactions

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Physical & Chemical Properties

Property Value
Appearance White to off‑white crystals
Density ~1.78–1.90 g/cm³
Melting Point ~79–83 °C
Boiling Point ~203–206 °C
Solubility Practically insoluble in water; soluble in DCM, THF, toluene
Flash Point ~203–206 °C

Applications

  • Solid alternative to phosgene for carbonylation, formation of chloroformates and isocyanates
  • Used in polymer, pharmaceutical, agrochemical, and specialty chemical syntheses

Safety & Handling

  • Toxic if inhaled; emits phosgene-like gas with moisture. Handle under inert atmosphere, in a cooled, well-ventilated environment. Store refrigerated (0–10 °C), protected from light and heat. GHS: H314/H330. Use full PPE and fume extraction.

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