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EC number: 204-617-8 | CAS number: 123-31-9
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption, other
- Remarks:
- adsorption
- Type of information:
- (Q)SAR
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
- Principles of method if other than guideline:
- other: calculation of Koc via EPISUITE 4.00 (KOCWIN v2.00)
- GLP compliance:
- no
- Media:
- soil
- Type:
- Koc
- Value:
- 38.47
- Type:
- log Koc
- Value:
- 1.585
- Details on results (HPLC method):
- A Soil Adsorption Coefficient Koc of 38.47 L/kg is calculated from EPISUITE 4.00 (KOCWIN v2.00)
- Conclusions:
- According to this institute's calculations, the Koc of hydroquinone is 38.47 L/kg. According to the scheme of Litz (1990) a very low to low soil sorption is to be expected.
- Endpoint:
- adsorption / desorption, other
- Remarks:
- adsorption
- Type of information:
- calculation (if not (Q)SAR)
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- The soil adsorption coefficient was estimated from water solubility and log Pow, respectively.
- GLP compliance:
- no
- Type of method:
- other: QSAR calculation
- Media:
- other: soil and sediment
- Type:
- Koc
- Value:
- 9 - 50
- Type:
- log Koc
- Value:
- 0.97 - 1.7
- Conclusions:
- The estimated Koc values were in the range of 9 to 50. These values indicate a very low to low sorption to organic matter in soil and sediment (according the scheme of Litz 1990). Therefore hydroquinone is expected to show high to very high mobility in soil and sediment (without taking into account potential ion-ion interactions).
Referenceopen allclose all
According to this institute's calculations, the Koc of hydroquinone is 38.47 L/kg.
The estimated Koc values were in the range of 9 to 50. These values indicate a very low to low sorption to organic matter in soil and sediment (according the scheme of Litz 1990). Therefore hydroquinone is expected to show high to very high mobility in soil and sediment (without taking into account potential ion-ion interactions).
Description of key information
The estimated Koc values were in the range of 9 to 50. These values indicate a very low to low sorption to organic matter in soil and sediment (according the scheme of Litz 1990). Therefore hydroquinone is expected to show high to very high mobility in soil and sediment (without taking into account potential ion-ion interactions). For the CSA, the highest value representing the worst case situation for the soil has been selected.
Key value for chemical safety assessment
- Koc at 20 °C:
- 50
Other adsorption coefficients
- Type:
- other: Koc
- Value in L/kg:
- 50
Additional information
The estimated Koc values were in the range of 9 to 50. These values indicate a very low to low sorption to organic matter in soil and sediment (according the scheme of Litz 1990). Therefore hydroquinone is expected to show high to very high mobility in soil and sediment (without taking into account potential ion-ion interactions).
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