Registration Dossier
Registration Dossier
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EC number: 209-708-6 | CAS number: 591-22-0
Biodegradation in soil
Administrative data
Link to relevant study record(s)
Description of key information
When tested alone, the test substance (3,5-lutidine) was fully metabolized under aerobic soil conditions within 2 weeks by pre-adapted inoculum.
Key value for chemical safety assessment
Additional information
In the supporting studies by Bollag and Kaiser et. al., 1989 -1990, the test substance, when tested alone under aerobic soil conditions, was metabolized within two weeks by pre-adapted inoculum. Biodegradation under anaerobic conditions was much slower and the concentration of the test substance, when tested alone, was decreased to 30% during the first three months of the study. Under sulphate-reducing conditions, the concentration of the test substance (20 mg/l) decreased between 20% to 50% during the first 3-month time period. In experiments with a mixture of four lutidine isomers combined (with 20 mg/l to 30 mg/l of each), the individual lutidine compounds took 1.5 months until all substrates were metabolized. In conclusion, the test substance, can be considered biodegradable in the soil environment.
The supporting study by Sims et. al. (1989) with soil suspensions and whole soils indicates that methylpyridines degrade in soil within 24 days. Therefore, it is concluded that the test substance (3,5-dimethylpyridine), though not specifically reported by the review article, would also rapidly degrade in the soil environment.
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