Bis(2-chloroethyl) ether

Adsorption / desorption

Link to relevant study record(s)

Reference

Endpoint:

adsorption / desorption, other

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Qualifier:

no guideline followed

Principles of method if other than guideline:

- Short description of test conditions: Glass columns were packed with a sandy soil with low organic matter (0.087% organic C) to a depth of 140 cm in a manner that preserved to the maximum extent possible the characteristics of the original soil profile. The columns received 14 cm/day of water containing a mixture of approximately 1.0 or 0.2 mg/L of each of various organic compounds. Quantities of compounds that volatilize from the soil surface were measured, as well as concentrations in the column effluent by GC-FID.

GLP compliance:

no

Remarks:

pre-GLP

Media:

soil

Specific details on test material used for the study:

TEST MATERIAL
- Names (as cited): Bis(2-chloroethyl)ether
- Purity: not specified

Radiolabelling:

no

Test temperature:

20+/-1°C

Analytical monitoring:

yes

Remarks:

GC-FID

Details on sampling:

- Sampling: sample of column effluent was collected for roughly 20 hours; the volume of sample, about 300 mL, represented approximately one-half the pore water volume of the columns.

Matrix no.:

#1

Matrix type:

other: sandy soil

% Clay:

> 1.5 - < 3.5

% Silt:

> 4 - < 8

% Sand:

> 89 - < 95

% Org. carbon:

> 0.02 - < 0.22

pH:

> 6.1 - < 6.6

CEC:

> 2.3 - < 4.8 not specified

Bulk density (g/cm³):

ca. 1.65

Details on matrix:

COLLECTION AND STORAGE
- Geographic location: Ada, Oklahoma
- Collection procedures: colllected in 10-cm increments from a soil profile
- Sampling depth (cm): 1-150 cm
- Storage length: as short as possible
- Soil preparation: to protect the biota, the soil was not dried or sieved

PROPERTIES
- Soil texture: Lincoln fine sand
- % sand: 92
- % silt: 5.9
- % clay: 2.1
- Horizon:
- Soil taxonomic classification: thermic Typic Ustifluvent
- pH: 6.4
- Organic carbon (%): 0.087
- CEC (meq/100 g): 3.5
- Insoluble carbonates (%):
- Bulk density (g/cm3): 1.65 g/cm3

Details on test conditions:

TEST CONDITIONS
- Buffer: None
- pH: 6.4

TEST SYSTEM
- Type, size and further details on reaction vessel: Columns of borosilicate glass process pipe, 5 cm i.d by 150 cm (Ace Glass Inc., Vineland, N.J.)
- Amount of soil: 140 cm
- Number of reaction vessels/concentration: 1
- Test performed in closed vessels due to significant volatility of test substance: no but fitted with a trap for volatile compounds

Key result

Sample No.:

#1

Type:

log Koc

Value:

1.88 dimensionless

pH:

6.4

Temp.:

20 °C

Matrix:

Sandy soil

% Org. carbon:

0.087

The following table present the fate of Bis-(2 -chloroethyl)ether when applied to the sandy soil:

Concentration applied in mg/L (measured)	Volatilized (%)	Column effluent (%)	Degraded or not accounted for (%)
0.86	Not determined	91 +/- 15	9 +/-31
0.16	Not determined	86 +/- 1	14 +/- 20

Validity criteria fulfilled:

not specified

Conclusions:

Under the conditions of this study, the Log Koc of Bis(2-chloroethyl)ether was determined to be 1.88 at 20°C and pH 6.4.

Executive summary:

This study aimed to assess the rentention of 13 organic pollutants in a sandy soil with low organic matter (0.087% organic C). Glass columns were packed with soil to a depth of 140 cm in a manner that preserved to the maximum extent possible the characteristics of the original soil profile. The columns received 14 cm/day of water containing a mixture of approximately 1.0 or 0.2 mg/liter of each of the organic compounds. Quantities of compounds that volatilize from the soil surface were measured, as well as concentrations in the column effluent.

Bis(2-chloroethyl)ether did not degrade or significantly volatilize (86% of the material applied reached 140 cm). Its retardation factors (velocity of tritiated water through soil divided by apparent velocity of pollutant through soil) was < 1.5, which shows that it can percolate rapidly through the soil. This results is in good agreement with the low octanol/water partition coefficient of Bis(2-chloroethyl)ether. Under the conditions of this study, the Log Koc of Bis(2-chloroethyl)ether was determined to be 1.88 at 20°C and pH 6.4.

While no detailed results are provided, the methodology is described in sufficient details. In addition the publication has been subject to peer-rewiew. Accordingly, the data is considered acceptable and has been assigned a reliability score of 2.

Description of key information

In a study aiming at assessing the rentention of 13 organic pollutants in a sandy soil with low organic matter (0.087% organic C), the Log Koc of Bis(2-chloroethyl) ether was determined at 1.88. Quantities of compounds that volatilize from the soil surface were measured, as well as concentrations in the column effluent. Bis(2-chloroethyl)ether did not degrade or significantly volatilize (86% of the material applied reached 140 cm). Its retardation factors (velocity of tritiated water through soil divided by apparent velocity of pollutant through soil) was < 1.5, which shows that it can percolate rapidly through the soil. This results is in good agreement with the low octanol/water partition coefficient of Bis(2-chloroethyl)ether.

Key value for chemical safety assessment

Koc at 20 °C:

75.86

Additional information

A single study reports an experimental Log Koc estimate for Bis(2-chloroethyl) ether.

The study by Wilson et al. (J. Environ. Qual., 1981, 10(4):501-6) aimed at assessing the rentention of 13 organic pollutants in a sandy soil with low organic matter (0.087% organic C). Glass columns were packed with soil to a depth of 140 cm in a manner that preserved to the maximum extent possible the characteristics of the original soil profile. The columns received 14 cm/day of water containing a mixture of approximately 1.0 or 0.2 mg/liter of each of the organic compounds. Quantities of compounds that volatilize from the soil surface were measured, as well as concentrations in the column effluent.

Bis(2-chloroethyl)ether did not degrade or significantly volatilize (86% of the material applied reached 140 cm). Its retardation factors (velocity of tritiated water through soil divided by apparent velocity of pollutant through soil) was < 1.5, which shows that it can percolate rapidly through the soil. This results is in good agreement with the low octanol/water partition coefficient of Bis(2-chloroethyl)ether. Under the conditions of this study, the Log Koc of Bis(2-chloroethyl)ether was determined to be 1.88 at 20°C and pH 6.4.

While no detailed results are provided, the methodology is described in sufficient details. In addition the publication has been subject to peer-rewiew. Accordingly, the data is considered acceptable and has been assigned a reliability score of 2.

[LogKoc: 1.88]