Riportiamo innanzitutto alcuni dettagli di interesse chimico sul DDT (dicloro-difenil-tricloroetano) CASRN: 50-29-3
Molecular Formula: C14-H9-Cl5 ([The Merck Index. 10th ed. Rahway, New Jersey: Merck Co., Inc., 1983., p. 409
Molecular Weight: 354.49
Boiling point: 260°C
Struttura molecolare del DDT (Tratta da www.wikipedia.org)
Density/Specific Gravity: 0.98 to 0.99
[Clayton, G.D., F.E. Clayton (eds.) Patty’s Industrial Hygiene and Toxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. New York, NY: John Wiley & Sons Inc., 1993-1994., p. 1508]**PEER REVIEWED**
Octanol/Water Partition Coefficient:
log Kow = 6.91 [Hansch, C., Leo, A., D. Hoekman. Exploring QSAR – Hydrophobic, Electronic, and Steric Constants. Washington, DC: American Chemical Society., 1995., p. 118]**PEER REVIEWED**
Spectral Properties:
Max absorption (95% alcohol): 236 nm
[Budavari, S. (ed.). The Merck Index – An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 1996., p. 481]**PEER REVIEWED**
IR: 15542 (Sadtler Research Laboratories Prism Collection)
[Weast, R.C. and M.J. Astle. CRC Handbook of Data on Organic Compounds. Volumes I and II. Boca Raton, FL: CRC Press Inc. 1985., p. V1 601]**PEER REVIEWED**
UV: 4655 (Sadtler Research Laboratories Spectral Collection)
[Weast, R.C. and M.J. Astle. CRC Handbook of Data on Organic Compounds. Volumes I and II. Boca Raton, FL: CRC Press Inc. 1985., p. V1 601]**PEER REVIEWED**
NMR: 620 (Varian Associates NMR Spectra Catalogue)
[Weast, R.C. and M.J. Astle. CRC Handbook of Data on Organic Compounds. Volumes I and II. Boca Raton, FL: CRC Press Inc. 1985., p. V1 601]**PEER REVIEWED**
Intensity of mass spectral peaks: 246 M/z (100%); 318 M/z (79%); 248 M/z (66%); 316 M/z (61%)
[Hites, R.A. Handbook of Mass Spectra of Environmental Contaminants. Boca Raton, FL: CRC Press Inc., 1985., p. 105]**PEER REVIEWED**
Vapor Pressure:
1.6X10-7 mm Hg @ 20 deg C [Bidleman TF, Foreman WT; Adv Chem Ser 216:27-56 (1987)]**PEER REVIEWED**
Alcune interessanti informazioni storiche si possono torvare al link di seguito a cui rimando:
http://www.anisn.it/scuola/strumenti/licheni/ddt.htm
Per la fabbricazione:
Indichiamo di sseguito due riferimenti bilgiografici per la fabbricazione che possono essere rintracciati nelle biblioteca di chimica tramite il C.A.S. che sarà sicuramente disponibile, sopratatutto si consiglia di consultare l’ottimo e sempre presente KIRK-Othmer.
1) Chlorobenzene undergoes acid-catalyzed condensation with trichloroacetaldehyde to produce DDT.
[Kirk-Othmer Encyclopedia of Chemical Technology. 3rd ed., Volumes 1-26. New York, NY: John Wiley and Sons, 1978-1984., p. 5(79) 800]**PEER REVIEWED**
2)… P Muller, US patent 2,329,074 (1944 to Geigy). … large scale production.
[Budavari, S. (ed.). The Merck Index – An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 1996., p. 481]**PEER REVIEWED**