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Basic Information
CAS No.: 75-44-5
Name: Carbonic dichloride
Molecular Structure:
Molecular Structure of 75-44-5 (Carbonic dichloride)
Formula: CCl2 O
Molecular Weight: 98.91
Synonyms: Phosgene(8CI); CG; Carbon dichloride oxide; Carbon oxychloride; Carbonyl chloride;Carbonyl dichloride; Chloroformyl chloride; Dichloroformaldehyde; Phosgen
EINECS: 200-870-3
Density: 1.523 g/cm3
Melting Point: -118 C
Boiling Point: 8.2 °C at 760 mmHg
Flash Point: 4°C
Solubility: decomposes
Appearance: colourless gas
Hazard Symbols: Very toxic via inhalation, strong irritant to eyes. TLV: 0.1 ppm.
Risk Codes: 26-34
Safety: A human poison by inhalation. A severe eye, skin, and mucous membrane irritant. In the presence of moisture, phosgene decomposes to form hydrochloric acid and carbon monoxide. This occurs in the bronchioles and alveoli of the lungs, resulting in pulmonary edema followed by bronchopneumonia and occasionally lung abscess. There is little immediate irritating effect upon the respiratory tract, and the warning properties of the gas are therefore very slight. There may be no immediate warning that dangerous concentrations are being inhaled. After a latent period of 2 to 24 hours, the patient complains of burning in the throat and chest, shortness of breath, and increasing dyspnea. Where the exposure has been severe, the development of pulmonary edema may be so rapid that the patient dies within 36 hours after exposure. In cases where the exposure has been less, pneumonia may develop several days after the occurrence of the accident. In patients who recover, no permanent residual disability is thought to occur. A common air contaminant.

Under the appropriate conditions it undergoes hazardous reactions with Al, tert-butyl azido formate, 2,4-hexadiyn-1,6-diol, isopropyl alcohol, K, Na, sodium azide, hexafluoroisopropylideneamino lithium, lithium. When heated to decomposition or on contact with water or steam it will react to produce toxic and corrosive fumes of CO and Cl. Caution: Arrangements should be made for monitoring its use.

Analytical Methods:


For occupational chemical analysis use OSHA: #ID-61.

Transport Information: UN 3384
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