Registration Dossier
Registration Dossier
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EC number: 202-311-9 | CAS number: 94-18-8
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Sorption coefficient test were conducted according to the OECD guideline 106 (Preliminary ecological risk assessment of butylparaben and benzylparaben-2. Fate and partitioning in aquatic environments, 2007). Test was conducted by measuring the decrease in the aquatic concentration of benzylparaben in 1 hour for five concentrations from 0- 10000 mg/L. initial concentration was 100 micrograms/Liter and pH was adjusted to 7. Recovery of benzylparaben was found to be more than 90 % and the final concentration of chemical was determined by HPLC system.From test it was found that the sorption coefficient of benzylparaben (94-18-8) was found to be 92±9 (4.2±0.4X103) in Elliot Silt Loam Soil.
Key value for chemical safety assessment
- Koc at 20 °C:
- 92
Additional information
Various studies were reviewed along with the prediction data to evalaute the effect of the test compound adsorption. these are summarized as follows:
Sorption coefficient test were conducted according to the OECD guideline 106 (Preliminary ecological risk assessment of butylparaben and benzylparaben-2. Fate and partitioning in aquatic environments, 2007). Test was conducted by measuring the decrease in the aquatic concentration of benzylparaben in 1 hour for five concentrations from 0- 10000 mg/L. initial concentration was 100 micrograms/Liter and pH was adjusted to 7. Recovery of benzylparaben was found to be more than 90 % and the final concentration of chemical was determined by HPLC system.From test it was found that the sorption coefficient of benzylparaben (94-18-8) was found to be 92±9 (4.2±0.4X103) in Elliot Silt Loam Soil.
Also, Sorption coefficient test were conducted according to the OECD guideline 106. Test was conducted by measuring the decrease in the aquatic concentration of benzylparaben in 1 hour for five concentrations from 0- 10000 mg/L. initial concentration was 100 micrograms/Liter and pH was adjusted to 7. Recovery of benzylparaben was found to be more than 90 % and the final concentration of chemical was determined by HPLC system.From test it was found that the sorption coefficient of benzylparaben (94-18-8) was found to be 1.4±0.9 (1.9±1.2X103) in Akui river sediment.
The sorption coefficient of benzylparaben (94-18-8) was found to be 13±1 (1.5±0.2X103) in Tamiya river sediment. Sorption coefficient test were conducted according to the OECD guideline 106. Test was conducted by measuring the decrease in the aquatic concentration of benzylparaben in 1 hour for five concentrations from 0- 10000 mg/L. initial concentration was 100 micrograms/Liter and pH was adjusted to 7. Recovery of benzylparaben was found to be more than 90 % and the final concentration of chemical was determined by HPLC system.From test it was found that the sorption coefficient of benzylparaben (94-18-8) was found to be 13±1 (1.5±0.2X103) in Tamiya river sediment.
From Adsorption by EPI (Estimation Programs Interface) Suite the predicted soil adsorption coefficient (Koc) value of Benzyl 4-hydroxybenzoate is estimated to be 3229 L/kg, indicating that it is has a high sorption to soil and sediment and therefore have slightly migration potential to groundwater.
[LogKoc: 1.963]
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