Registration Dossier

Administrative data

Link to relevant study record(s)

Description of key information

1,2-Dichloropropane was degraded in water and sediment by naturally occurring microorganisms under anaerobic conditions.  Biotransformation of 1,2-dichloropropane proceeds via reductive dehalogenation, with propene being the terminal product

Key value for chemical safety assessment

Half-life in sediment:
60 d
at the temperature of:
298 K

Additional information

1,2 -Dichloropropane was degraded in water and sediment by naturally occurring organisms under anaerobic conditions. Studies conducted with sediments from Red Cedar Creek demonstrated stoichiometric conversion to propene after 4 months of incubation. Based on these results, the estimated half-life in surface sediments is 60 days at 25 C. Reductive dehalogenation and dehydrodehalogenation are the likely mechanisms involved in biotransformation of 1,2 -dichloropropane under anaerobic conditions, which is consistent with the transient formation of 1 -chloro- and 2 -chloropropane in the microcosms. Propene was the terminal product of the reaction, and was not transformed further in the cultures. The rate of the reaction was shown to be dependent on temperature, presence of electron donors (e.g., hydrogen, or organic compounds including methanol or sodium acetate), and soil type. Reaction rates were slower in subsurface soils.