Soybean oil, deodorizer distillate

Biodegradation in soil

Administrative data

Endpoint:

biodegradation in soil

Type of information:

calculation (if not (Q)SAR)

Remarks:

Migrated phrase: estimated by calculation

Adequacy of study:

key study

Study period:

Not applicable

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Estimation according to the ultimate biodegradation expert survey model of the BIOWIN3 of EPIWEB v 4.1

Justification for data waiving:

other:

Cross-reference

Cross-reference 1

Reason / purpose for cross-reference:

reference to same study

Cross-reference 2

Reason / purpose for cross-reference:

reference to other study

Data source

Reference

Reference Type:

other: software

Title:

Unnamed

Year:

2011

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: REACH guidance on QSARs: Chapter R.6. QSARs and grouping of chemicals

Principles of method if other than guideline:

The biodegradation rates of the components were determined using the ‘ultimate biodegradation expert survey model of the BIOWIN estimation program (Biowin3)’ and their corresponding half-lives were doubled to get the half-life in soil.

Test type:

other: Estimated using EIWEB v 4.1

Test material

Test material information

Constituent 1

Reference substance name:

'Soybean oil, deodorizer distillates'

IUPAC Name:

'Soybean oil, deodorizer distillates'

Constituent 2

Reference substance name:

Soybean oil, deodorizer distillate

EC Number:

272-211-8

EC Name:

Soybean oil, deodorizer distillate

Cas Number:

68783-88-0

Molecular formula:

No generic molecular formula is available

IUPAC Name:

Not available for UVCB

Details on test material:

- Name of test material: 'Soybean oil, deodorizer distillates' (CAS N° 68783-88-0, EC N° 272-211-8); under the SDA nomenclature, the name of this substance is ‘glycerides, 'Soybean oil, deodorizer distillates'.
- Composition:
A.Glycerides for C18 chain length i.e. tristerain or glycerol tristearate
B. Fatty acid: Stearic
C. Unsaponifiable matters:
(a) Total Tocopherols: (i) alpha-tocopherol (ii) beta-tocopherol (iii) gamma-tocopherol (iv) delta-tocopherol
(b) Total sterols: (i) Cholesterol (ii) Brassicasterol (iii) Campesterol (iv) Stigmasterol (v) β-Sitosterol
(c) Squalene

Specific details on test material used for the study:

Details on properties of test surrogate or analogue material (migrated information):
Not applicable

Study design

Oxygen conditions:

other: not applicable

Soil classification:

other: not applicable

Details on soil characteristics:

Not applicable

Parameter followed for biodegradation estimation:

other: Ultimate biodegradation expert survey model of the BIOWIN

Details on experimental conditions:

Not applicable

Results and discussion

% Degradation

Parameter:

other: not applicable

Half-life / dissipation time of parent compound

Half-life / dissipation time of parent compound 1

DT50:

75 d

Type:

other: first-order kinetics using ultimate biodegradation expert survey model of the BIOWIN model

Remarks on result:

other: BIOWIN corresponding half-lives were doubled to get the half-life in soil for glycerides for C18 chain length i.e. tristerain or glycerol tristearate

Half-life / dissipation time of parent compound 2

DT50:

30 d

Type:

other: first-order kinetics using ultimate biodegradation expert survey model of the BIOWIN model

Remarks on result:

other: BIOWIN corresponding half-lives were doubled to get the half-life in soil for glycerides for fatty acid: Stearic acid

Half-life / dissipation time of parent compound 3

DT50:

120 d

Type:

other: first-order kinetics using ultimate biodegradation expert survey model of the BIOWIN model

Remarks on result:

other: BIOWIN corresponding half-lives were doubled to get the half-life in soil for glycerides for unsaponifiable matters: total tocopherols

Half-life / dissipation time of parent compound 4

DT50:

120 d

Type:

other: first-order kinetics using ultimate biodegradation expert survey model of the BIOWIN model

Remarks on result:

other: BIOWIN corresponding half-lives were doubled to get the half-life in soil for glycerides for unsaponifiable matters: total sterols

Half-life / dissipation time of parent compound 5

DT50:

75 d

Type:

other: first-order kinetics using ultimate biodegradation expert survey model of the BIOWIN model

Remarks on result:

other: BIOWIN corresponding half-lives were doubled to get the half-life in soil for glycerides for unsaponifiable matters: squalene

Details on transformation products:

Not applicable

Details on results:

See below in section 'any other information on results incl. tables'.

Results with reference substance:

Not applicable

Any other information on results incl. tables

RESULTS: The biodegradation rates of the components were determined using the ‘ultimate biodegradation expert survey model of the BIOWIN estimation program (Biowin3)’ and their corresponding half-lives were doubled to get the half-life in soil.

Soil Half-life estimation:

The ‘soybean oil, deodorizer distillates’ biodegradation in water time range and its assigned half-life by BIOWIN3 is as follows:

Components	BIOWIN Output	Converted assigned half-life in water (days)	Converted half-life in soil (days)
Glycerides: For C18 chain length i.e. tristerain or glycerol tristearate	weeks to months	37.5	75
Fatty acids	weeks	15	30
UMs: Total tocopherols:Beta- Tocopherol	months	60	120
UMs: Total tocopherols:gamma- Tocopherol	months	60	120
UMs: Total tocopherols:delta- Tocopherol	months	60	120
UMs: Total sterols:Cholesterol	months	60	120
UMs: Total sterols:Brassicasterol	months	60	120
UMs: Total sterols:Campesterol	months	60	120
UMs: Total sterols:Stigmasterol	months	60	120
UMs: Total sterols:Beta-sitosterol	months	60	120
Squalene	weeks to months	37.5	75

Applicant's summary and conclusion

Conclusions:

The estimated half life in soil for 'Soybean oil, deodorizer distillates' , consisting of glycerides, fatty acids and unsaponifiable matters ranges from 30 to 120 days.

Executive summary:

The soil biodegradation half life of 'soybean oil, deodorizer distillates' was determined using theultimate biodegradation expert survey model of the BIOWIN estimation program (Biowin 3) of EPIWEB v 4.1for each of its constituents i.e. glycerides and free fatty acids of mainly C16-18 and C18-unsatd., chain lengths and unsaponifiable matter (UM) (e.g. tocopherols, sterols, sterol esters and squalene).

The biodegradation half-life in water for the components determined using the BIOWIN3 estimation program were doubled to get the biodegradation half-life in soil.

The estimated half life in soil for 'Soybean oil, deodorizer distillates', consisting of glycerides, fatty acids and unsaponifiable matters ranges from 30 to 120 days.