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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:
other: Modeling database
Principles of method if other than guideline:
Prediction done using BCFBAF (v3.01) model
GLP compliance:
not specified
Specific details on test material used for the study:
- Name of test material: 5-amino-2-chlorobenzenesulfonic acid
- Molecular formula: C6H6ClNO3S
- Molecular weight: 207.636 g/mol
- Smiles notation: S(c1c(ccc(c1)N)Cl)(O)(=O)=O
- InChl: 1S/C6H6ClNO3S/c7-5-2-1-4(8)3-6(5)12(9,10)11/h1-3H,8H2,(H,9,10,11)
- Substance type: Organic
- Physical state: Solid
Radiolabelling:
not specified
Vehicle:
not specified
Test organisms (species):
other: Fish
Route of exposure:
aqueous
Test type:
not specified
Water / sediment media type:
natural water: freshwater
Test temperature:
25 deg.C
Reference substance (positive control):
not specified
Key result
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

BCFBAF Program (v3.01) Results:

==============================

SMILES : O=S(=O)(O)c(c(ccc1N)CL)c1

CHEM : Benzenesulfonic acid, 5-amino-2-chloro-

MOL FOR: C6 H6 CL1 N1 O3 S1

MOL WT : 207.63

--------------------------------- BCFBAF v3.01 --------------------------------

Summary Results:

Log BCF (regression-based estimate): 0.50 (BCF = 3.16 L/kg wet-wt)

Biotransformation Half-Life (days) : 0.00941 (normalized to 10 g fish)

Log BAF (Arnot-Gobas upper trophic): -0.05 (BAF = 0.894 L/kg wet-wt)

Log Kow (experimental): not available from database

Log Kow used by BCF estimates: -1.44

Equation Used to Make BCF estimate:

Log BCF = 0.50 (Ionic; Log Kow dependent)

Estimated Log BCF = 0.500 (BCF = 3.162 L/kg wet-wt)

Validity criteria fulfilled:
not specified
Conclusions:
The estimated bioconcentration factor (BCF) of 5-amino-2-chlorobenzenesulfonic acid was estimated to be 3.162 L/kg whole body w.w (at 25 deg C) which does not exceed the bio concentration threshold of 2000, indicating that the chemical is not expected to bioaccumulate in the food chain.
Executive summary:

BCFBAF model (v3.01) of Estimation Programs Interface (EPI Suite, 2017) prediction program was used to predict the bioconcentration factor (BCF) of test chemical 5 -amino-2 -chlorobenzenesulfonic acid (CAS No. 88 -43 -7). The bioconcentration factor (BCF) of 5-amino-2-chlorobenzenesulfonic acid was estimated to be 3.162 L/kg whole body w.w (at 25 deg C) which does not exceed the bioconcentration threshold of 2000, indicating that the chemical 5-amino-2-chlorobenzenesulfonic acid is not expected to bioaccumulate in the food chain.

Description of key information

BCFBAF model (v3.01) of Estimation Programs Interface (EPI Suite, 2017) prediction program was used to predict the bioconcentration factor (BCF) of test chemical 5 -amino-2 -chlorobenzenesulfonic acid (CAS No. 88 -43 -7). The bioconcentration factor (BCF) of 5-amino-2-chlorobenzenesulfonic acid was estimated to be 3.162 L/kg whole body w.w (at 25 deg C) which does not exceed the bioconcentration threshold of 2000, indicating that the chemical 5-amino-2-chlorobenzenesulfonic acid is not expected to bioaccumulate in the food chain.

Key value for chemical safety assessment

BCF (aquatic species):
3.162 L/kg ww

Additional information

Various predicted data for the target compound 5-amino-2-chlorobenzenesulfonic acid (CAS No. 88-43-7) and the supporting weight of evidence studies for its read across substance were reviewed for the bioaccumulation end point which are summarized as below:

 

In aprediction done using theBCFBAF Program(v3.01) of Estimation Programs Interface (EPI Suite, 2017) prediction program was used to predict the bioconcentration factor (BCF) of test chemical 5 -amino-2 -chlorobenzenesulfonic acid (CAS No. 88 -43 -7). The bioconcentration factor (BCF) of 5-amino-2-chlorobenzenesulfonic acid was estimated to be 3.162 L/kg whole body w.w (at 25 deg C).

 

In an another prediction done by using Bio-concentration Factor (v12.1.0.50374) moduleACD (Advanced Chemistry Development)/I-Lab predictive module, 2017), the bio-concentration factor over the entire pH scale (pH 0 -14) of the test substance 5-amino-2-chlorobenzenesulfonic acid (CAS no. 88 -43 -7) was estimated to be 1.

 

Bioaccumulation test was conducted for estimating the bioconcentration factor (BCF) of test chemical 5-amino-2-chlorobenzenesulfonic acid (CAS no. 88 -43 -7)(ChemSpider, 2017). The estimated bioconcentration factor (BCF) of 5-amino-2-chlorobenzenesulfonic acid was estimated to be 1 at pH 5.5 and 7.4, respectively.

 

Another predicted data was estimated usingSciFinder database (American Chemical Society (ACS), 2017) for predicting the bioconcentration factor (BCF) of test chemical 5-amino-2-chlorobenzenesulfonic acid (CAS No. 88 -43 -7). The estimated bioconcentration factor (BCF) of 5 -amino-2 -chlorobenzenesulfonic acid was estimated to be 1 (at 25 deg C).

 

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 5-amino-2-chlorobenzenesulfonic acid was estimated to be 5.36 dimensionless . The predicted BCF result based on the 5 OECD principles. Thus based on the result it is concluded that the test substance 5-amino-2-chlorobenzenesulfonic acid is non-bioaccumulative in nature.

 

In a supporting weight of evidence study from authoritative database (J-CHECK, 2017) for the read across chemical sodium 2-chloro-5-nitrobenzenesulfonate (CAS no. 946-30-5),bioaccumulation experiment was conducted on test organism Cyprinus carpiofor 6 weeks for evaluating the bioconcentration factor (BCF value) of read across substance sodium 2 -chloro-5 -nitrobenzenesulfonate. The study was performed according to 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 3.0 mg/l and 0.3 mg/l (w/v), respectively. Range finding study involve the TLm (48 hr) of ≥ 1000 ppm (1000 mg/l) (w/v) on Rice fish (Oryzias latipes). The bioconcentration factor (BCF value) of substance sodium 2 -chloro-5 -nitrobenzenesulfonate on Cyprinus carpio was determined to be ≤ 0.3 L/Kg at a conc. of 3.0 mg/l and ≤ 3 L/Kg at a conc. of 0.3 mg/l, respectively.

 

For the read across chemical 2-amino-5-methylbenzene sulfonic acid (CAS no. 88-44-8) from authoritative database (J-CHECK, 2017),bioaccumulation study was conducted on test organism Cyprinus carpiofor 6 weeks for evaluating the bioconcentration factor (BCF value) of read across substance 2 -amino-5 -methylbenzene sulfonic acid (CAS no. 88 -44 -8).The study was performed according to 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 2.0 mg/l and 0.2 mg/l (w/v), respectively. Range finding study involve the TLm (48 hr) of ≥ 480 ppm (480 mg/l) (w/v) on Rice fish (Oryzias latipes). The bioconcentration factor (BCF value) of substance 2 -amino-5 -methylbenzene sulfonic acid on Cyprinus carpio was determined to be ≤ 0.4 L/Kg at a conc. of 2.0 mg/l and ≤ 4 L/Kg at a conc. of 0.2 mg/l, respectively.

 

On the basis of above results for target chemical5-amino-2-chlorobenzenesulfonic acid(from EPI Suite, ACD labs,ChemSpider, SciFinder database and CompTox Chemistry Dashboard,2017) and for its read across substance from J-CHECK, it can be concluded that the BCF value of test substance5-amino-2-chlorobenzenesulfonic acid ranges from 1 –5.36which does not exceed the bioconcentration threshold of 2000, indicating that the chemical 5-amino-2-chlorobenzenesulfonic acid is not expected to bioaccumulate in the food chain.