Diphosgene

Diphosgene
Names
	Preferred IUPAC name Trichloromethyl carbonochloridate
	Other names Trichloromethyl chloroformate, surpalite
Identifiers
CAS Number	503-38-8 ;
3D model (JSmol)	Interactive image;
ChemSpider	21154424 ;
ECHA InfoCard	100.007.242
EC Number	207-965-9;
PubChem CID	10426;
RTECS number	LQ7350000;
UNII	PO4Q4R80LV;
CompTox Dashboard (EPA)	DTXSID60862065 ;
	InChI InChI=1S/C2Cl4O2/c3-1(7)8-2(4,5)6 Key: HCUYBXPSSCRKRF-UHFFFAOYSA-N ; InChI=1/C2Cl4O2/c3-1(7)8-2(4,5)6 Key: HCUYBXPSSCRKRF-UHFFFAOYAO;
	SMILES ClC(=O)OC(Cl)(Cl)Cl;
Properties
Chemical formula	C2Cl4O2
Molar mass	197.82 g/mol
Appearance	liquid at room temperature
Density	1.65 g/cm3
Melting point	−57 °C (−71 °F; 216 K)
Boiling point	128 °C (262 °F; 401 K)
Solubility in water	insoluble, reacts
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	highly toxic, maybe corrosive; asphyxiant
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H300, H301, H314, H330
Precautionary statements	P260, P264, P270, P271, P280, P284, P301+P310, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P320, P321, P330, P363, P403+P233, P405, P501
Flash point	32 °C (90 °F; 305 K)
Related compounds
Related compounds	COCl2, Cl2
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Diphosgene is an organic chemical compound with the formula ClCO₂CCl₃. This colorless liquid is a valuable reagent in the synthesis of organic compounds. Diphosgene is related to phosgene and has comparable toxicity, but is more conveniently handled because it is a liquid, whereas phosgene is a gas.