Soybean oil, oligomerized

Adsorption / desorption

Administrative data

Endpoint:

adsorption / desorption: screening

Type of information:

(Q)SAR

Adequacy of study:

key study

Study period:

09 February 2010 – 17 March 2010

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 limited documentation / justification

Remarks:

Read-across to QSAR calculation. Log Kow of test substance (>6) may be outside of applicability domain of QSAR (1 - 7.5). Structure of test substance is outside of applicability domain of QSAR (only molecules containing C, H, F, Cl, Br and I atoms are suited for calculations, test substance contains O atoms). No validation (QMRF and QPRF) provided.

Justification for type of information:

The log Kocwas calculated using the QSAR for predominantly hydrophobics given in Technical Guidance document in support of Commission Directive 93/67/on Risk Assessment for new notified substances and Commission Regulation (EC) 1488/94 on Risk Assessment for existing substances. This QSAR was used because Standolized linseed oil is a hydrophobic compound:

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Reference

Endpoint:

adsorption / desorption: screening

Type of information:

read-across based on grouping of substances (category approach)

Adequacy of study:

supporting study

Justification for type of information:

See attached justification

Reason / purpose for cross-reference:

read-across source

The log K_ocwas calculated using the QSAR for predominantly hydrophobics given in Technical Guidance document in support of Commission Directive 93/67/on Risk Assessment for new notified substances and Commission Regulation (EC) 1488/94 on Risk Assessment for existing substances. This QSAR was used because Standolized linseed oil is a hydrophobic compound:

Log Koc = 0.81 log Pow + 0.10

The partition coefficient, P_ow, of Standolized linseed oil was determined to be >1x10⁶ (log P_ow >6) using the estimation method (section 4.7). Using this log P_ow value and the above given equation, log K_ocof Standolized linseed oil was calculated to be > 4.96.

Validity criteria fulfilled:

not applicable

Conclusions:

log Koc of Standolized soybean oil was calculated to be > 4.96 by a QSAR method via read across to linseed oil

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 121 (Estimation of the Adsorption Coefficient (Koc) on Soil and on Sewage Sludge using High Performance Liquid Chromatography (HPLC))

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method C.19 (Estimation of the Adsorption Coefficient (KOC) on Soil and Sewage Sludge Using High Performance Liquid Chromatography (HPLC))

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

other: Technical Guidance document in support of Commission Directive 93/67/EEC on Risk Assessment for new notified substances and Commission Regulation (EC) 1488/94 on Risk Assessment for existing substances. Part III, pages 532 - 543.

Deviations:

no

Principles of method if other than guideline:

The adsorption coefficient (Koc) cannot be determined using the HPLC method since Standolized linseed oil does not dissolve in water, methanol and acetonitrile at a concentration of 1 g/L required for refractive index detection.
Due to its low solubility in aqueous solvents, also OECD106 is not applicable.
As an alternative, the adsorption coefficient was determined using a quantitative structure activity relationship (QSAR).

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

67746-08-1

Cas Number:

67746-08-1

IUPAC Name:

67746-08-1

Details on test material:

- Name of test material (as cited in study report): Standolized linseed oil
- Substance type: Hazy yellow/brown viscous liquid
- Physical state: liquid
- Analytical purity: treated as 100% pure
- Lot/batch No.: 09.317.013
- Expiration date of the lot/batch: 21 December 2010
- Stability under test conditions: stable
- Storage condition of test material: At room temperature in the dark
- Other: -

Radiolabelling:

no

Results and discussion

Adsorption coefficient

Key result

Type:

log Koc

Value:

> 4.96

Remarks on result:

other: value derived from equation

Any other information on results incl. tables

The log K_ocwas calculated using the QSAR for predominantly hydrophobics given in Technical Guidance document in support of Commission Directive 93/67/on Risk Assessment for new notified substances and Commission Regulation (EC) 1488/94 on Risk Assessment for existing substances. This QSAR was used because Standolized linseed oil is a hydrophobic compound:

Log Koc = 0.81 log Pow + 0.10

The partition coefficient, P_ow, of Standolized linseed oil was determined to be >1x10⁶ (log P_ow >6) using the estimation method (section 4.7). Using this log P_ow value and the above given equation, log K_ocof Standolized linseed oil was calculated to be > 4.96.

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Conclusions:

log Koc of Standolized linseed oil was calculated to be > 4.96 via a QSAR method.