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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Reference
Endpoint:
bioaccumulation in aquatic species, other
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Justification for type of information:
Estimated data generated using the EPI Suite program developed by the USEPA.
Qualifier:
according to guideline
Guideline:
other: Modeling database
Principles of method if other than guideline:
Prediction done using BCFBAF (v3.01) model
GLP compliance:
no
Radiolabelling:
no
Vehicle:
not specified
Test organisms (species):
other: Fish
Route of exposure:
aqueous
Test type:
flow-through
Water / sediment media type:
natural water: freshwater
Test temperature:
25 °C
Reference substance (positive control):
no
Temp.:
25 °C
Type:
BCF
Value:
3.162 L/kg
Basis:
whole body w.w.
Calculation basis:
other: estimated
Remarks on result:
other: Non-bioaccumulative
Validity criteria fulfilled:
not specified
Conclusions:
Using BCFBAF Program (v3.00) model of EPI suite (2018) the estimated bio concentration factor (BCF) for test chemical is 3.162 L/kg wet-wt at 25 °C.
Executive summary:

Using BCFBAF Program (v3.00) model of EPI suite (2018) the estimated bio concentration factor (BCF) for test chemical  is  3.162 L/kg wet-wt at 25 °C which does not exceed the bioconcentration threshold of 2000. Therefore it is concluded that test chemical is non-bioaccumulative in food chain.

Description of key information

Using BCFBAF Program (v3.00) model of EPI suite (2018) the estimated bio concentration factor (BCF) for test chemical  is  3.162 L/kg wet-wt at 25 deg. c which does not exceed the bioconcentration threshold of 2000. Therefore it is concluded that test chemical is nonbioaccumulative in food chain.

Key value for chemical safety assessment

BCF (aquatic species):
3.162 L/kg ww

Additional information

Different predicted data study for test chemical and experimental studies for its read across chemicals have been reviewed for bioaccumulation endpoint and their results are summarized below.

 

In first study BCF value of test chemical was estimated by using BCFBAF Program (v3.00) model of EPI suite (2018) and the estimated bio concentration factor (BCF) for test chemical is 3.162 L/kg wet-wt at 25 deg. c which does not exceed the bioconcentration threshold of 2000. Therefore it is concluded that test chemical is non-bioaccumulative in food chain.

 

In next study from CompTox Chemistry Dashboard using OPERA (OPEn (quantitative) structure-activity Relationship Application)  V1.02 model in which calculation based on PaDEL descriptors (calculate molecular descriptors and fingerprints of chemical)  the bioaccumulation i.e BCF for test substance was estimated to be 279 dimensionless . The predicted BCF result was based on the 5 OECD principles.

Thus based on the result it is concluded that the test substance is non-bioaccumulative in nature.

 

Another study was experimental study reviewed from authoritative database in this Bioaccumulation study was conducted on test organism Cyprinus carpio for 6 weeks for evaluating the bioconcentration factor (BCF value) of test chemical. The study was performed according to “OECD Guideline 305 C (Bioaccumulation: Test for the Degree of Bioconcentration in Fish)” and other guideline "Bioaccumulation test of a chemical substance in fish or shellfish" provided in "the Notice on the Test Method Concerning New Chemical Substances". Cyprinus carpio was used as a test organism for the study. Test chemical nominal conc. used for the study were 1 mg/l and 0.1 mg/l .Test chemical solution was prepared in crystal sugar or HCO-40.Analytical method involve there recovery ratio: Fish : 85.8 %, - Limit of quantitation : Test water : 1st concentration area : 0.024 mg/L, 2nd concentration area : 0.0024 mg/L, Fish : 0.28 microg/g. Range finding study involve the LC50 (48hr) ≥ 400 mg/l on Rice fish (Oryziaslatipes). Lipid content of the test organism Cyprinus carpio was determined to be 4.2% at start of exposure. The bioconcentration factor (BCF value) of test chemical on Cyprinus carpio was determined to be in the range of 0.3 – 2.7 L/Kg at a conc. of 1 mg/l and ≤ 2.9 L/Kg at a conc. of 0.1 mg/l, which does not exceed the bioconcentration threshold of 2000, indicating that the chemical is expected to non-bioaccumulate in the food chain.

 

In next study the bioaccumulation study was conducted for estimating the BCF (bioaccumulation factor) value of test chemical. The bioaccumulation factor (BCF) value was calculated using a log Kow of 6.6 and a regression-derived equation. The estimated BCF (bioaccumulation factor) value of test chemical was determined to be 10 dimensionless, which does not exceed the bioconcentration threshold of 2000, indicating that the test chemical is expected to be non-bioaccumulative in aquatic organisms.

 

 By considering results of all the studies mentioned above it is concluded that test chemical is non bioaccumulative.