N-potassium phthalimide

Bioaccumulation: aquatic / sediment

Link to relevant study record(s)

Reference

Endpoint:

bioaccumulation in aquatic species: fish

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 model developed by the USEPA.

Qualifier:

according to guideline

Guideline:

other: Modelling database

Principles of method if other than guideline:

Prediction done using BCFBAF Program (v3.00) model

GLP compliance:

not specified

Specific details on test material used for the study:

- Name of test material (as cited in study report): Potassium phthalimide
- Molecular formula (if other than submission substance): C8H5NO2.K
- Molecular weight (if other than submission substance): 185.223 g/mol
- Smiles notation (if other than submission substance): c12c(C(=O)[NH-]C1=O)cccc2.[K+]
- InChI: 1S/C8H5NO2.K/c10-7-5-3-1-2-4-6(5)8(11)9-7;/h1-4H,(H,9,10,11);/q;+1/p-1
- 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

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 : OC1=NC(=O)c2ccccc12

CHEM : Potassium phthalimidate

MOL FOR: C8 H5 N1 O2

MOL WT : 147.13

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

Summary Results:

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

Biotransformation Half-Life (days) : 0.216 (normalized to 10 g fish)

Log BAF (Arnot-Gobas upper trophic): 0.13 (BAF = 1.36 L/kg wet-wt)

Log Kow (experimental): not available from database

Log Kow used by BCF estimates: 0.69

Equation Used to Make BCF estimate:

Log BCF = 0.50

Correction(s): Value

Correction Factors Not Used for Log Kow < 1

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

Validity criteria fulfilled:

not specified

Conclusions:

The estimated bio concentration factor (BCF) for Potassium phthalimide is 3.162 L/kg wet-wt which does not exceed the bioconcentration threshold of 2000.Thus it is concluded that Potassium phthalimide is not expected to bio accumulate in fish and in the food chain.

Executive summary:

The estimated bio concentration factor (BCF) for Potassium phthalimide is 3.162 L/kg wet-wt which does not exceed the bioconcentration threshold of 2000.Thus it is concluded that Potassium phthalimide is not expected to bio accumulate in fish and in the food chain.

Description of key information

The estimated bio concentration factor (BCF) for Potassium phthalimide is 3.162 L/kg wet-wt which does not exceed the bioconcentration threshold of 2000.Thus it is concluded that Potassium phthalimide is not expected to bio accumulate in the food chain.

Key value for chemical safety assessment

BCF (aquatic species):

3.162 L/kg ww

Additional information

Three studies including Predicted data and Experimental result of Bioaccumulation endpoint for the target chemical Potassium phthalimide (Cas no. 1074-82-4) and its read across chemical which is structurally similar to target were reviewed to summarize as follows:  

 

First study from prediction program EPI suite 2017 using BCFBAF model (v3.01), the Bioaccumulation factor (BCF) was predicted to be 3.162 L/kg wet-wt at 25 deg.C for target Potassium phthalimide.

 

Similarly another predicted model PBT profiler; 2017 indicate that the Bioaccumulation factor (BCF) was predicted to be 3.2 L/kg wet-wt at 25 deg.C for Potassium phthalimide.

 

And last study from HSDB database; 2017 for the read across chemical i.e Phthalimide (Cas no. 85-41-6) indicated that a BCF value of 4.4 was calculated for phthalimide(SRC), using an experimental log Kow of 1.15 and a recommended regression derived equation. This BCF value suggests that bioconcentration in aquatic organisms will not be an important fate process.

 

All above result for bioaccumulation factor from target and read across study result is in the range of 3.162 -4.4 (L/kg wet-wt or dimensionless).

Thus based on the available BCF range concluded that the test substance chemical Potassium phthalimide (Cas no. 1074-82-4) is non Bioaccumulative in aquatic environment.