Registration Dossier
Registration Dossier
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EC number: 204-617-8 | CAS number: 123-31-9
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
- Endpoint:
- bioaccumulation in aquatic species: fish
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study does not need to be conducted because the substance has a low potential for bioaccumulation based on log Kow <=3
Reference
Description of key information
No key study is available for the bioaccumulation potential in aquatic and sediment species. However, the studies can be waived due to the low bioaccumulation potential in line with Annex IX, Column 2 of Section 9.3.2.
Hydroquinone has a log octanol/water partition coefficient < 3 (0.59), it is not surface-active and it is not ionisable under environmental conditions (pH 4 – 9).
According to the QSAR calculation, the BCF of hydroquinone is 3.162 L/kg. It can be concluded that hydroquinone has no bioconcentration potential in fish. The value is used for the CSA.
Key value for chemical safety assessment
- BCF (aquatic species):
- 3.162 L/kg ww
Additional information
No data is available. However, in order to be able to use CHESAR for the exposure assessment, a conclusion is provided for the CSA. So, the BCF of hydroquinone is calculated by QSAR model.
The EPISUITE model is relevant for this endpoint and therefore it is used to estimate the BCF of hydroquinone. A bioaccumulation factor BCF of 3.162 L/kg is calculated from EPISUITE 4.00 (BCFBAF v3.00) with a log Kow of 0.59.
According to the QSAR calculation, the BCF of hydroquinone is 3.162 L/kg. It can be concluded that hydroquinone has no bioconcentration potential in fish.
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