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Environmental fate & pathways

Adsorption / desorption

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Description of key information

From EPI suite predicted model the soil adsorption coefficient (Koc) value of 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone is estimated to be 13000 L/kg i.e Log Koc-4.1139 this Log Koc value indicating that it is has a high sorption to soil and  sediment and therefore have negligible migration potential to groundwater.

Key value for chemical safety assessment

Koc at 20 °C:
13 000
Log Koc at 20 °C:
4.114

Additional information

Various predicted data for the target chemical 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone (Cas no. 27425-55-4) and read across chemical N,N-diethylaniline(Cas no. 91-66-7) were reviewed to summarize the following information: 

Predicted sources i.e EPI Suite and Chemspider,Scifinder (Advanced Chemistry Development (ACD/Labs) Software V11.02) database indicate that the test substance 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone has a strong sorption to soil and sediment and therefore have negligible migration potential to groundwater.

With following Koc values:

EPI SUITE - 13000 (Log Koc=4.1139)

Scifinder (Advanced Chemistry Development (ACD/Labs) Software V11.02) - Koc= 5590 (log Koc= 3.7474) at pH 6, Koc= 6100 (log Koc= 3.7853) at pH 7

Chemspider - 7559.93 (log Koc =3.8785)

Other experimental study for read across N,N-diethylaniline (Cas no. 91-66-7) indicate that the The adsorption coefficient Koc in soil and in sewage sludge N,N-diethylaniline (CAS No. 91-66-7) was determined by the Reverse Phase High Performance Liquid Chromatographic method according to OECD Guideline No. 121 for testing of Chemicals. The reference substances were chosen according to structural similarity with the test substance and calibration graph was prepared. The Log Koc value was found to be 3.594 ± 0.003at 25°C

Thus overall all results indicate that the test substance 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone (Cas no. 27425-55-4) have tendency strong sorption to soil and sediment and therefore have negligible migration potential to groundwater.