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Administrative data

Link to relevant study record(s)

Description of key information

Short description of key information on bioaccumulation potential result: 
The physicochemical properties of the test substance, and extensive toxicity studies in animals provide strong support in determining the ADME profile for this substance, and therefore may substitute for the experimentation of in vivo effects.

Key value for chemical safety assessment

Bioaccumulation potential:
no bioaccumulation potential

Additional information

With respect to molecular weight (398 for the representative strucutre), low water solubility (0.105 ppm), and Log Kow (range from 3.7 to 7.8), it is concluded that the test material is absorbed in the gastro-intestinal tract after oral administration.

Absorption via skin is expected to be low based on QSAR analyses.

 

Inhalative exposure is of no relevance due to the low vapor pressure.

 

Extensive distribution can be assumed from the target tissues identified in a subacute toxicological study. After oral exposure to high doses, kidneys, and liver have been identified as target organs for systemic effects.

The test material is assumed to be object to hydroxylation, oxidation and reduction mediated by variousenzymes present in skin, liver, GI tract, or intestinal microflora. The metabolites have function groups suitable for conjugation reaction with phase II enzymes.

 

It can be assumed that elimination of the substance is relevent. Based on the results from the subacute study, bioaccumulation in exposed organisms is not expected.

Discussion on bioaccumulation potential result:

This substance is virtually insoluble in aqueous milieu (water solubility 0.105 ppm), and has a high Kow (range from 3.7 to 7.8, and 50% of the species > 5.89), both are outside the optimal window for intestinal/dermal absorption.The lack of adverse findings following oral dosing (LD50 > 5000 mg/kg for acute toxicity; or NOAEL 1000 mg/kg/d for repeat dose toxicity may be at least partially due to limited gastrointestinal/dermal absorption of the test substance after treatment, and/or a very low index of inherent toxicity for this substance, and/or its metabolite(s).