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EC number: 273-227-8
CAS number: 68953-84-4
QSAR estimations are available for the 3 main constituents of DAPD.1) Supporting study (QSAR): EpiWeb estimation for R-59_12h (CAS 74-31-7) (0 methyl groups)2) Supporting study (QSAR): EpiWeb estimation for R-1679_12h (CAS 27173-16-6) (1 methyl group)3) Supporting study (QSAR): EpiWeb estimation for R-898_12h (CAS 15017-02-4) (2 methyl groups)
The phototransformation rate in air was estimated with the aid of a QSAR
model (EpiWeb) since no actual data are available for the substance of
concern. This model was run for the 3 main constituents of DAPD.
The Atmospheric Oxidation Program for Microsoft Windows (AOPWIN)
estimates the rate constant for the atmospheric, gas-phase reaction
between photochemically produced hydroxyl radicals and organic
chemicals.The rate constants estimated by the program are then used to
calculate atmospheric half-lives for organic compounds based upon
average atmospheric concentrations of hydroxyl radicals.
The default settings for 12 -hour daylight hydroxyl radical
concentration of 1.5 *106 radicals/cm3 was used.
The DT50 (at 25°C) was similar for all 3 constituents, namely 0.64 hrs,
the overall degradation rate constant (OH) was 200.2720 * 10-12
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