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EC number: 202-486-1
CAS number: 96-18-4
The results of a second test phase divided from those of the first phase
in the sense that there was an anomaly due to a difference in the range
of the air and water standard curves for the substance in the two
experimental phases. In the publication it is recommended to use the
values of the second phase which are given above.
The Henry's Law constant of 1,2,3-trichloropropane was determined over
the temperature range from 26.5 to 45 °C by measuring the equilibrium
concentrations of the substance in air and water, using simultaneous
sampling from sealed bottles kept at constant temperatures. The values
for the dimensionless Henry's Law constant ranged from 0.01 at 26.5 °C
to 0.02 at 45 °C.
The Henry’s Law Constant of TCP was calculated with the EUSES model,
which gives a value of 13.9 Pa x m3 / mol at 12 °C and 1013 hPa (Wormuth
2010b). Based on the measured Henry’s Law Constant of 22.8 Pa x m3 / mol
(Tancrède and Yanagisawa 1990) it is expected that TCP has a moderate
volatility from the aqueous phase. Experimental data show that the
half-life for stripping of TCP from water is between 1 and 1.5 hours
(Dilling 1977, Albanese et al. 1987). On the other hand, significant
amounts of TCP may be washed out from the atmosphere by wet deposition
considering the water solubility of 1.75 g/L for TCP (WHO 2003).
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