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EC number: 203-445-0
CAS number: 106-94-5
Stability , biodegradation, bioaccumulation (water
The substance is very soluble in water (solubility value of 2450 mg/l at
20 °C). In water or in moist soil surfaces the substance can undergo a
substitution reaction to form 1-propanol as the hydrolytic product.
1-bromopropane has a measured hydrolysis half-life at 25 °C and at pH 7
of 23 days. 1 -bromopropane is expected to volatilize from water and
moist soil surfaces, based on an estimated Henry's Law constant of
742.96 Pa*m3/mol (0.00732 atm*m3/mol). From dry
soil surfaces, an estimated Koc of 66.4 L/kg (KOCWIN v2.00) indicates
that 1-bromopropane has a very low affinity to soil and due to its high
vapor pressure it should quickly volatilize to atmosphere. Although the
substance is found to be not readily biodegradable, the abiotic
(volatilization and hydrolysis) processes are important and can indicate
that the substance will not remain in water phase. This can be further
supported by models estimated results (Volatilization From Water
program; EPISuite v4.00) showing volatilization half-life from a model
river was calculated as 1.2 hours, from a model lake, 4.4 days. Based on
the above argumentations it can be concluded that the substance can be
considered as of no concern to aquatic /terrestrial organisms. This can
be further supported by an estimated low bioconcentration factor of
11.29 L/kg wet-wt (BCFBAF v3.00).
Stability (atmospheric compartment):
If released to the atmosphere, 1-bromopropane will exist solely in the
vapour-phase based on an experimental vapour pressure of 14.8 kPa (20
°C). In the vapour-phase, it is predicted to react fairly rapidly with
hydroxyl radicals with an estimated half-life of 11.6 days (AOPWIN
Based on the study on n-propyl bromide Ozone Depletion Potential
in the MOZART 3.1 three-dimensional chemical-transport model of the
global atmosphere from 2008, the nPB ODP (Ozone Depletion Potential) is
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