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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Administrative data

Endpoint:
biodegradation in water: simulation testing on ultimate degradation in surface water
Type of information:
(Q)SAR
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
Justification for type of information:
Please refer to the attached QMRF and QPRF

Data source

Referenceopen allclose all

Reference Type:
other: QSAR Method Reporting Format
Title:
Unnamed
Year:
2019
Report date:
2019
Reference Type:
other: QSAR Prediction Reporting Format
Title:
Unnamed
Year:
2021
Report date:
2021
Reference Type:
other: QSAR
Title:
EpiSuite v4.11, BioHCwin v1.01
Author:
Howard et al.
Year:
2010
Bibliographic source:
Howard, P.H., W.M., Meylan, Aronson, D., Stiteler,W.M., Tunkel, J., Comber, M. and Parkerton, F.  2005.  A New Biodegradation Prediction Model Specific to Petroleum Hydrocarbons. Environ. Toxicol. Chem. 24(8): 1847-1860

Materials and methods

Test guideline
Guideline:
other: Reach Guidance on QSARs R.6
Principles of method if other than guideline:
The result was obtained using an appropriate QSAR method (see attached QMRF and QPRF for details).

Test material

Constituent 1
Chemical structure
Reference substance name:
2-methyltricosane
EC Number:
940-734-7
Molecular formula:
C18H38, C19H40, C20H42, C21H44, C22H46, C23H48, C24H50
IUPAC Name:
2-methyltricosane

Results and discussion

Half-life of parent compound / 50% disappearance time (DT50)
Compartment:
water
DT50:
>= 29 d

Applicant's summary and conclusion

Conclusions:
C8-26 branched and linear alkanes are predicted to have biodegradation half-life in water of ≤294 days. The results are considered to be reliable.