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EC number: 205-851-3 | CAS number: 156-38-7
Endpoint summary
Administrative data
Description of key information
Bioaccumulation: aquatic/sediments:
Using BCFBAF Program (v3.00) model of EPI suite (2017) the estimated bio concentration factor (BCF) for p-hydroxyphenylacetic acid (CAS No. 156-38-7) 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 p-hydroxyphenylacetic acid is non bioaccumulative in food chain.
Additional information
Bioaccumulation: aquatic/sediments:
Various predicted data for the target compoundp-hydroxyphenylacetic acid (CAS No. 156-38-7) and supporting weight of evidence studies for its structurally similar read across chemical were reviewed for the bioaccumulation end point which are summarized as below:
The first predicted data study was done by using BCFBAF Program (v3.00) model of Estimation Program Interface (EPI suite 2018) the estimated bio concentration factor (BCF) for p-hydroxyphenylacetic acid (CAS No. 156-38-7) 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 p-hydroxyphenylacetic acid is non bioaccumulative in food chain.
In another predicted data study the Bioconcentration factor (BCF) for test chemical p-hydroxyphenylacetic acid (CAS No: 156-38-7) was predicted in aquatic organisms by Scifinder database of American Chemical Society (ACS, 2017) at pH 1-10 and temperature 25 °C .The Bioconcentration factor (BCF) of test substance p-hydroxyphenylacetic acid at temperature 25 °C was estimated to be in range 1.46 - 1.97 dimensionless at pH range 1-4 and at pH range 5-10 BCF value estimated was 1.0 dimensionless. These BCF values at pH 1-10 and temperature 25 °C suggests that the test chemical p-hydroxyphenylacetic acid is non bioaccumulative in aquatic organisms.
In next predicted data study the Bioconcentration factor (BCF) for test chemical p-hydroxyphenylacetic acid (CAS No: 156-38-7) was predicted in aquatic organisms by Chemspider- ACD/PhysChem Suite of Royal Society of Chemistry (RCS, 2017) at pH 5.5 and pH 7.4.The Bioconcentration factor (BCF) of test substance p-hydroxyphenylacetic acid at pH 5.5 and 7.4 was estimated to be 1.0 dimensionless . This BCF value suggests that the test chemical p-hydroxyphenylacetic acid is non bioaccumulative in aquatic organisms.
Last predicted data stud was done 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 p-hydroxyphenylacetic acid (CAS no.156 -38 -7) was estimated to be 4.15 dimensionless . The predicted BCF result was based on the 5 OECD principles. Thus based on the result it is concluded that the test substance p-hydroxyphenylacetic acid is non-bioaccumulative in nature, because the bioconcentration factor in fish is less than 2000.
Next study was experimental study done for structurally similar read across chemical 4-chlorophenoxyacetic acid in this study according to authoritative database the BCF value estimated was 3 dimensionless by,using a log Kow of 2.25 and a regression derived equation. This BCF value suggests the potential for bioconcentration in aquatic organisms is low.
On the basis of above results for target chemical p-hydroxyphenylacetic acid (CAS No. 156-38-7) (from EPI suite, Sci Finder database, Chemspider and CompTox Chemistry Dashboard 2017) and for its read across chemicals (From HSDB) it can be concluded that the BCF value of test substancep-hydroxyphenylacetic acid (CAS No. 156-38-7) ranges from 1 to 4.15 dimensionless which does not exceed the bioconcentration threshold of 2000, indicating that the chemicalp-hydroxyphenylacetic acid (CAS No. 156-38-7) is expected to be nonbioaccumulative in the food chain.
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