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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Bioaccumulation: aquatic / sediment

Currently viewing:

Administrative data

Endpoint:
bioaccumulation in aquatic species: invertebrate
Type of information:
(Q)SAR
Adequacy of study:
supporting study
Study period:
Up to 2009
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: QSAR calculation, limitations in design and reporting but otherwise adequate for assessment.
Justification for type of information:
QSAR prediction:

Data source

Reference
Reference Type:
other: QSAR
Title:
Results from BCFBAF v3.0
Author:
BCFBAF v 3.0
Year:
2009
Bibliographic source:
EPIWEB v4.0

Materials and methods

Principles of method if other than guideline:
The BCFBAF method classifies a compound as either ionic or non-ionic.  Ionic compounds include carboxylic acids, sulfonic acids and salts of sulfonic acids, and charged nitrogen compounds (nitrogen with a +5 valence such as quaternary ammonium compounds).  All other compounds are classified as non-ionic. The QSAR estimation equation used for log Kow 1.0-7.0 is: Log BCF = 0.6598 Log kow - 0.333 + Σ correction factors.
GLP compliance:
no
Remarks:
Not applicable

Test material

Constituent 1
Chemical structure
Reference substance name:
2-methylpropane-2-thiol
EC Number:
200-890-2
EC Name:
2-methylpropane-2-thiol
Cas Number:
75-66-1
Molecular formula:
C4H10S
IUPAC Name:
2-methylpropane-2-thiol
Details on test material:
Not applicable
Specific details on test material used for the study:
Details on properties of test surrogate or analogue material
Not applicable

Sampling and analysis

Details on sampling:
Not applicable

Test solutions

Details on preparation of test solutions, spiked fish food or sediment:
Not applicable

Test organisms

Test organisms (species):
other: fish
Details on test organisms:
Not applicable

Study design

Route of exposure:
other: Not applicable
Test type:
other: Not applicable
Water / sediment media type:
natural water: freshwater

Test conditions

Hardness:
Not applicable
Test temperature:
Not applicable
pH:
Not applicable
Dissolved oxygen:
Not applicable
TOC:
Not applicable
Salinity:
Not applicable
Details on test conditions:
Not applicable
Nominal and measured concentrations:
Not applicable
Details on estimation of bioconcentration:
Not applicable

Results and discussion

Bioaccumulation factor
Type:
BCF
Value:
11.97
Basis:
other: L/kg wet weight
Remarks on result:
other: Conc.in environment / dose:1.888 g/L (limit of solubility at 25°C)
Details on kinetic parameters:
Not applicable
Metabolites:
Not applicable
Results with reference substance (positive control):
Not applicable
Details on results:
BCF = 11.97
Log BCF = 1.078
Log Kow used = 2.14
Reported statistics:
Not applicable

Applicant's summary and conclusion

Conclusions:
The estimated BCF for 2-methyl-2-propanethiol is 11.97.
Executive summary:

The use of QSAR is considered reliable and suitable for use for this endpoint.