Basic information Safety Related Supplier


Basic information Safety Related Supplier
4,4'-DDE Basic information
  • Product Name:4,4'-DDE
  • CAS:72-55-9
  • MF:C14H8Cl4
  • MW:318.03
  • EINECS:200-784-6
  • Mol File:72-55-9.mol
4,4'-DDE Chemical Properties
  • Melting point:88-90 °C(lit.)
  • Boiling point:403.45°C (rough estimate)
  • Density 1.3406 (rough estimate)
  • vapor pressure 13 at 30 °C (Wescott et al., 1981)
  • refractive index 1.6000 (estimate)
  • Flash point:11 °C
  • storage temp. 2-8°C
  • solubility ethanol: soluble
  • form neat
  • color White, crystalline, odorless powder
  • Water Solubility 292mg/L(25 ºC)
  • BRN 1913355
  • Henry's Law Constant0.33 at 25 °C (gas stripping-GC, Jantunen and Bidleman, 2006)
  • Stability:Stable, but light-sensitive. Incompatible with strong bases, strong oxidizing agents.
  • EPA Substance Registry Systemp,p'-DDE (72-55-9)
Safety Information
4,4'-DDE Usage And Synthesis
  • Chemical Propertieswhite crystalline powder
  • UsesMilitary product; chemical research. Degradation product of p,p′-DDT.
  • DefinitionChEBI: A chlorophenylethylene that is ethylene substituted by two 4-chlorophenyl groups at position 1 and two chlorine atoms at position 2.
  • General DescriptionWhite crystalline solid or white powder.
  • Air & Water ReactionsInsoluble in water.
  • Reactivity Profile4,4'-DDE is sensitive to exposure to light. 4,4'-DDE is incompatible with strong oxidizing agents and strong bases. Oxidation is catalyzed by UV radiation.
  • Health HazardA derivative of DDT; structurally and toxicproperties are similar to those of DDT;however, the acute effects are somewhatmilder; moderately toxic by ingestion; ateratogenic substance; adequate evidence ofcarcinogenicity in experimental animals
    LD50 oral (rat): 880 mg/kg
    LD50 oral (mouse): 700 mg/kg.
  • Fire HazardFlash point data for 4,4'-DDE are not available. 4,4'-DDE is probably combustible.
  • Safety ProfileSuspected carcinogen withexperimental carcinogenic and neoplastigenic data. Poisonby ingestion. Experimental reproductive effects. Mutationdata reported. An insecticide. When heated todecomposition it emits very toxic fumes of Cl-.
  • SourceAgricultural runoff degradation of p,p′-DDT (quoted, Verschueren, 1983).
  • Environmental FateBiological. In four successive 7-day incubation periods, p,p′-DDE (5 and 10 mg/L) was recalcitrant to degradation in a settled domestic wastewater inoculum (Tabak et al.,1981).
    Photolytic. When an aqueous solution of p,p′-DDE (0.004uM) in natural water samples collected from California and Hawaii was irradiated (maximum λ= 240 nm) for 120 hours, 62% was photooxidized to p,p′-dichlorobenzophenone (Ross and Crosby, 1985).
    When p,p′-DDE in water was irradiated at 313 nm, a quantum yield of 0.3 was achieved. A photolysis half-life of 0.9 days in summer and 6.1 days in winter by direct sunlight at 40° latitude was observed. Photolysis products included DDMU (yield 20%), o-chl
    When p,p′-DDE in a methanol solvent was photolyzed at 260 nm, a dichloro-benzophenone, a dichlorobiphenyl, DDMU and 3,6-dichlorofluorenone (yield 10%) formed as the major products (Plimmer et al., 1970). Chemical/Physical. May degrade to bis(chlorophenyl)acetic acid (DDA) and hydrochloric acid in water (Verschueren, 1983) or oxidize to p,p′-dichlorobenzophenone using UV light as a catalyst (U.S. Department of Health and Human Services, 1989).
  • Purification MethodsCrystallise DDE from MeOH or EtOH and dry it in vacuo. The purity is checked by TLC. [G.tzi & Stammbach Helv Chim Acta 28 569 1946, Beilstein 5 H 639, 5 III1891.] POSSIBLE CARCINOGEN.
4,4'-DDE(72-55-9)Related Product Information
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