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Diphosgene

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Diphosgene Basic information

Product Name:
Diphosgene
Synonyms:
  • carbonochloridicacidtrichloromethylester
  • chloro-formicacitrichloromethylester
  • Difosgen
  • Diphosgen
  • DP
  • Formic acid, chloro-, trichloromethyl ester
  • Methanol, trichloro-, chloroformate
  • perchloromethylformate
CAS:
503-38-8
MF:
C2Cl4O2
MW:
197.83
EINECS:
207-965-9
Product Categories:
  • Pharmaceutical Intermediates
  • API Intermediate
Mol File:
503-38-8.mol
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Diphosgene Chemical Properties

Melting point:
-57 °C
Boiling point:
20 °C10 mm Hg(lit.)
Density 
1.64
refractive index 
n20/D 1.458
Flash point:
>110°C
storage temp. 
2-8°C
form 
Liquid
color 
Clear colorless
Water Solubility 
may decompose
Sensitive 
Moisture Sensitive
Merck 
14,3334
BRN 
970225
CAS DataBase Reference
503-38-8(CAS DataBase Reference)
NIST Chemistry Reference
Trichloromethyl chloroformate(503-38-8)
EPA Substance Registry System
Carbonochloridic acid, trichloromethyl ester(503-38-8)
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Safety Information

Hazard Codes 
T+,Xi
Risk Statements 
26/28-34-26/27/28-36/37/38
Safety Statements 
26-28-36/37/39-45-28A-36
RIDADR 
UN 3277 6.1/PG 2
WGK Germany 
3
RTECS 
LQ7350000
8-10-19
TSCA 
Yes
HazardClass 
6.1
PackingGroup 
II
HS Code 
29159000
Hazardous Substances Data
503-38-8(Hazardous Substances Data)
Toxicity
LC100 in rabbits (10-20 minutes exposure to vapor): 0.9 mg/l air (Klika, Mysliveckova)

MSDS

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Diphosgene Usage And Synthesis

Chemical Properties

clear colorless liquid

Uses

In organic synthesis; as war gas.

Definition

diphosgene: A colourless liquid,ClCO.O.CCl3, originally used in 1916by Germany in World War I as achemical warfare agent. It is nowused as a reagent in organic synthesis.See also carbonyl chloride.

General Description

Colorless liquid, odorless to fruity.

Air & Water Reactions

Decomposes slowly in water or moist air (or when inhaled) to form very corrosive hydrogen chloride gas (hydrochloric acid) and carbon monoxide.

Hazard

Toxic by inhalation and ingestion, strong irritant to tissue.

Fire Hazard

Some may burn but none ignite readily. Vapors from liquefied gas are initially heavier than air and spread along ground. Some of these materials may react violently with water. Cylinders exposed to fire may vent and release toxic and/or corrosive gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket.

Safety Profile

Low toxicity by inhalation. A corrosive liquid. When heated to decomposition it emits toxic vapors of Cl-.

Diphosgene Preparation Products And Raw materials

Preparation Products

DiphosgeneSupplier

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