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Detail of "75-44-5"

  • CAS Number:
  • 75-44-5
  • Name:
  • Carbonic dichloride

  • Molecular Structure:
  • 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
  • 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. Details

  • Transport Information:
  • UN 3384

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Reference

Pulmonary changes in the rat following low phosgene exposure
Pulmonary changes in the rat following low phosgene exposure. Diller, Werner F.; Bruch, Joachim; Dehnen, Walter (Dep. Occup. Health, Bayer A.-G., Leverkusen D-5090, Fed. Rep. Ger.). Arch. Toxicol., 57(3), 184-90 (English) 1985. CODEN: ARTODN. ISSN: 0340-5761. DOCUMENT TYPE: Journal CA Section: 4 (Toxicology) Minimal inhalation doses (or concns.) of phosgene [75-44-5] necessary for the prodn. of changes within the blood-air barrier were detd. in rats. At least 50 ppm ′ min (5 ppm ′ 10 min) was necessary for the prodn. of alveolar edema (the minimal effective phosgene concn. being 5 ppm). Since the smallest phosgene dose to produce an increase in pulmonary lavage protein content was also 50 ppm ′ min and since the smallest phosgene dose to produce widening of pulmonary interstices was 25 ppm ′ min, there was no phosgene threshold concn. (down to 0.1 ppm) for these 2 latter parameters, which are assumed to be indicators of physiol. compensatory mechanisms within the blood-air barrier. The primary localization of pulmonary damage seemed to depend on the concn. of phosgene used: at low concns. (0.1-2.5 ppm) the changes were primarily located at the transition from terminal brochioles to the alveolar ducts; at higher concns. (5 ppm) damage to the alveolar pneumocytes (type I) was more conspicuous.
Removing toxic hydrocarbon derivatives from air by oxidation and ultraviolet light irradiation
Removing toxic hydrocarbon derivatives from air by oxidation and ultraviolet light irradiation. Kagiya, Tsutomu; Takemoto, Katsuo (Japan ). Japan. Kokai JP 51065072 5 Jun 1976 Showa,5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: B01D053-34. APPLICATION: JP 74-138446 4 Dec 1974. DOCUMENT TYPE: Patent CA Section: 59 (Air Pollution and Industrial Hygiene) A mixt. of oxidizable compds. and a gas contg. O2 or O3 is mixed with a Cl-contg. compd. RCl (where R is Cl, carbonyl monochloride, dicarbonyl chloride, unsatd. hydrocarbon group, halogenated unsatd. hydrocarbon group, sulfur monochloride group, chlorine disulfide group, thionyl monochloride, sulfonyl monochloride, amino, imino, nitrogen dichloride group, phosphoryl monochloride), and irradiated with uv light. If necessary, the gas formed is reacted with a basic compd. Toxic hydrocarbon derivs. are oxidized and decompd. Thus, a glass reactor (650 ml) equipped with a 100 W high-voltage Hg lamp was charged with air. Vinyl chloride [75-01-4] (1.35 mL) was added to yield a gas mixt. contg. 2000 ppm vinyl chloride monomer. Phosgene [75-44-5] as an accelerator was added at 2000 ppm. The mixt. was irradiated at room temp. for 30 sec. The decompn. of vinyl chloride was 100%.
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