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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Administrative data

Link to relevant study record(s)

Referenceopen allclose all

Endpoint:
bioaccumulation in aquatic species, other
Type of information:
(Q)SAR
Adequacy of study:
weight of evidence
Study period:
not applicable
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: BCF value calculated by using a QSAR Method.
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to other study
Qualifier:
no guideline required
Principles of method if other than guideline:
calculations based on structure activity
GLP compliance:
no
Remarks:
(not applicable)
Specific details on test material used for the study:
Details on properties of test surrogate or analogue material (migrated information):
not applicable
Radiolabelling:
no
Details on sampling:
not applicable
Details on preparation of test solutions, spiked fish food or sediment:
not applicable
Test organisms (species):
no data
Details on test organisms:
no data
Route of exposure:
other: QSAR
Test type:
other: QSAR
Water / sediment media type:
not specified
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
Reference substance (positive control):
not required
Remarks:
QSAR
Details on estimation of bioconcentration:
not applicable
Type:
other: log BCF
Value:
2.465 dimensionless
Remarks on result:
other: regression-based estimate, BCFBAF v3.01
Key result
Type:
BCF
Value:
291.4 L/kg
Basis:
whole body w.w.
Remarks on result:
other: regression-based estimate, BCFBAF v3.01
Details on kinetic parameters:
no data
Metabolites:
no data
Results with reference substance (positive control):
no data
Details on results:
no data
Reported statistics:
no data

Information for approaches from BCFBAF v3.01 software are given through attached files (QMRF and QPRF).

Validity criteria fulfilled:
yes
Conclusions:
BCF value of nopyl acetate (CAS 35836-72-7) is 291.4 L/kg wet-wt.
Executive summary:

BCF value of nopyl acetate (CAS 35836 -72 -7) was assessed by using BCFBAF v3.01 software. The results with the regression-based estimate approach is the following:

Log BCF = 2.465 , BCF (L/kg) = 291.4

Endpoint:
bioaccumulation in aquatic species, other
Type of information:
(Q)SAR
Adequacy of study:
weight of evidence
Study period:
not applicable
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: BCF value calculated by using a QSAR Method.
Justification for type of information:
QSAR prediction: migrated from IUCLID 5.6
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to other study
Qualifier:
no guideline required
Principles of method if other than guideline:
calculations based on structure activity
GLP compliance:
no
Remarks:
(not applicable)
Radiolabelling:
no
Details on sampling:
not applicable
Details on preparation of test solutions, spiked fish food or sediment:
not applicable
Test organisms (species):
no data
Details on test organisms:
No data
Route of exposure:
other: QSAR
Test type:
other: QSAR
Water / sediment media type:
not specified
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
Reference substance (positive control):
not required
Remarks:
QSAR
Details on estimation of bioconcentration:
not applicable
Type:
other: Log BCF
Value:
2.546 dimensionless
Remarks on result:
other: Arnot-Gobas lower trophic (including biotransformation), BCFBAF v3.01 (logKow = 4.24)
Key result
Type:
BCF
Value:
351.8 L/kg
Basis:
whole body w.w.
Remarks on result:
other: Arnot-Gobas lower trophic (including biotransformation), BCFBAF v3.01 (logKow = 4.24)
Details on kinetic parameters:
no data
Metabolites:
no data
Results with reference substance (positive control):
no data
Details on results:
no data
Reported statistics:
no data

Information for approaches from BCFBAF v3.01 software are given through attached files (QMRF and QPRF).

Validity criteria fulfilled:
yes
Conclusions:
BCF value of nopyl acetate (CAS 35836-72-7) is 351.8 L/kg wet-wt.
Executive summary:

BCF value of nopyl acetate (CAS 35836 -72 -7) was assessed with BCFBAF v3.01 software. The results for the Arnot-Gobas lower trophic (including biotransformation) approach are the following:

Log BCF = 2.546, BCF (L/kg) = 351.8

Endpoint:
bioaccumulation in aquatic species, other
Type of information:
(Q)SAR
Adequacy of study:
weight of evidence
Study period:
not applicable
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: BCF value calculated by using a QSAR Method without QMRF developped.
Justification for type of information:
QSAR prediction: migrated from IUCLID 5.6
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to other study
Qualifier:
no guideline required
Principles of method if other than guideline:
calculations based on structure activity
GLP compliance:
no
Remarks:
(not applicable)
Radiolabelling:
no
Details on sampling:
not applicable
Details on preparation of test solutions, spiked fish food or sediment:
not applicable
Test organisms (species):
no data
Details on test organisms:
no data
Route of exposure:
other: QSAR
Test type:
other: QSAR
Water / sediment media type:
not specified
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
Reference substance (positive control):
not required
Remarks:
QSAR
Details on estimation of bioconcentration:
not applicable
Type:
other: log BCF
Value:
2.904 dimensionless
Remarks on result:
other: TGD Part II, Chapter 3.8, equation (74) p. 126 (logKow = 4.24)
Key result
Type:
BCF
Value:
801.7 L/kg
Basis:
whole body w.w.
Remarks on result:
other: TGD Part II, Chapter 3.8, equation (74) p. 126 (logKow = 4.24)
Details on kinetic parameters:
no data
Metabolites:
no data
Results with reference substance (positive control):
no data
Details on results:
no data
Reported statistics:
no data

The TGD (2003) equation has been assessed according to the OECD principles.

1. a defined endpoint:

bioconcentration Factor (BCF)

2. an unambiguous algorithm:

For a substance with a log Kow of 2 -6, the following linear relationship can be used as developed by Veith et al. (1979):

log BCF (fish) = 0.85*log Kow - 0.70.

For a substance with a log Kow higher than 6, a parabolic equation can be used:

log BCF (fish) = -0.20*log Kow² + 2.74*log Kow - 4.72.

3. a defined domain of applicability:

The model applicability domain consists of 2 parts: organic chemicals with log Kow of 2 -6 and organic chemicals with log Kow > 6.

4. appropriate measures of goodness-of-fit, robustness and predictivity:

n (number of data) = 55; R² (correlation coefficient) = 0.90

5. a mechanistic interpretation, if possible:

no data

Validity criteria fulfilled:
not applicable
Conclusions:
BCF value of nopyl acetate (CAS 35836-72-7) is 801.7 L/kg wet-wt.
Executive summary:

BCF value of nopyl acetate (CAS 35836 -72 -7) has been assessed by using the TGD Part II, Chapter 3.8, equation (74) p. 126.

The results are the following:

TGD Part II, Chapter 3.8, equation (74) p. 126 approach, log BCF = 2.904, BCF (L/kg) = 801.7

Description of key information

The bioconcentration factor (BCF) was estimated by three QSAR models:
- BCFBAF v3.01 module of EPI Suite (v4.0) - Regression-based estimate
- BCF-BAF v3.01 module of EPI Suite (v4.0) (including biotransformation) - Arnot-Gobas lower trophic level
- A model described in Technical Guidance Risk Assessment (European Chemicals Bureau, 2003) - Part II, Chapter 3.8, equation (74) p. 126
The estimated fish BCF of nopyl acetate (CAS 35836-72-7) is 434.8 L/kg (geometric mean of results of the three QSAR models: 291.4, 351.8 and 801.72 L/kg).

Key value for chemical safety assessment

BCF (aquatic species):
434.8 L/kg ww

Additional information

ECHA Guidance (chapter R.7.c) recommends to calculate the BCF endpoint value as the geometric mean of results obtained by means of QSAR models.

This geometric mean value is considered as the endpoint defining the substance potential for bioaccumulation and can be used as input parameter for environmental risk assessment.