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EC number: 271-089-3
CAS number: 68515-47-9
Conclusion (indirect photodegradation): DTDP has the potential to degrade rapidly by OH- attack. However multimedia distribution modeling indicates DTDP is predicted to partition negligibly (0.1%) to the air compartment because it has a low vapor pressure (0.000000036 Pa) and a relatively short atmospheric oxidation half-life (4 hours). Therefore, this process is unlikely to contribute significantly to the loss of DTDP from the environment.
Indirect photochemical degradation of DTDP
as mediated by OH- attack is estimated to have a half-life
of 0.33 days or 4 hours based on a 12 -hour sunlight day, a rate of
3.27E-11 cm3/molecule*sec, and an average OH- concentration of 1.5E6
2000). A 12-hour day half-life
value normalizes degradation to a standard day light period during which
hydroxyl radicals needed for photolysis are generated in the atmosphere.
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