Registration Dossier

Diss Factsheets

Environmental fate & pathways

Adsorption / desorption

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
adsorption / desorption
Remarks:
adsorption
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Estimated data generated using the EPI Suite model developed by the USEPA
Qualifier:
according to guideline
Guideline:
other: Modelling database
Principles of method if other than guideline:
KOCWIN Program (v2.00)
GLP compliance:
no
Type of method:
other: MCI Method
Media:
soil
Radiolabelling:
not specified
Test temperature:
25 Deg.C
Analytical monitoring:
not specified
Type:
Koc
Value:
204.5
Temp.:
25 °C
Remarks on result:
other: Log Koc=2.310 (Estimated via MCI method)
Validity criteria fulfilled:
not specified
Conclusions:
The Soil Adsorption Coefficient i.e Koc value of Octyl acetate was estimated using EPI suite KOCWIN Program (v2.00) program as Koc 204.5 L/kg(log Koc=2.310) by means of MCI method at 25 deg.C. This Koc value indicates that the substance Octyl acetate has a low sorption to soil and sediment and therefore have moderate migration potential to groundwater.
Executive summary:

The Soil Adsorption Coefficient i.e Koc value of Octyl acetate was estimated using EPI suite KOCWIN Program (v2.00) program as Koc 204.5 L/kg(log Koc=2.310) by means of MCI method at 25 deg.C. This Koc value indicates that the substance Octyl acetate has a low sorption to soil and sediment and therefore have moderate migration potential to groundwater.

Description of key information

The Soil Adsorption Coefficient i.e Koc value of Octyl acetate was estimated using EPI suite  KOCWIN Program (v2.00) program as Koc 204.5 L/kg(log Koc=2.310)  by means of MCI method at 25 deg.C. This Koc value indicates that the substance Octyl acetate has a Moderate sorption to soil and  sediment and therefore have slow migration potential to groundwater.

Key value for chemical safety assessment

Koc at 20 °C:
204.5

Additional information

Experimental and Predicted data of adsorption endpoint for the target chemical Octyl acetate (Cas no. 112-14-1) and its read across chemical were reviewed to summarize as follows:  

 

From predicted model EPI suite 2016 indicate that the soil adsorption coefficient (Koc) value of chemical Octyl acetate is estimated to be 204.5 L/kg (log KOC = 2.310) by means of MCI method at 25 deg.C, indicating that it is has a Moderate sorption to soil and sediment and therefore have slow migration potential to groundwater. 

 

Whereas from chemspider predicted database the soil adsorption coefficient i.e Koc value of test substance Octyl acetate was estimated to be 2921.84 L/Kg i.e Log Koc= 3.465 at pH 5.5 and 7.4. This Koc value indicates that the substance Octyl acetate has a Moderate sorption to soil and sediment and therefore have slow migration potential to groundwater.   

 

From HSDB database; 2016 the read across chemical Cyclohexyl acetate (Cas no. 622-45-7) indicate the adsorption coefficient (Koc) of substance Cyclohexyl acetate was found to be 650 using an estimated log Kow of 2.64 and a regression-derived equation.This Koc value suggests that cyclohexyl acetate is expected to have low mobility in soil.

Thus based on the above all studies it is concluded that the test substance Octyl acetate (Cas no. 112-14-1) has moderate to low mobility in soil/sediment.

[LogKoc: 2.31]