Ethyl [2-(4-phenoxyphenoxy)ethyl]carbamate

Other distribution data

Administrative data

Endpoint:

other distribution data

Remarks:

volatilisation

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

11 Nov 1993 to 29 Nov 1993

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1994

Report date:

1994

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: BBA IV 6-1

Version / remarks:

Jul 1990

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of study:

volatility

Media:

soil - air

Test material

Test material information

Constituent 1

Reference substance name:

Ethyl [2-(4-phenoxyphenoxy)ethyl]carbamate

EC Number:

276-696-7

EC Name:

Ethyl [2-(4-phenoxyphenoxy)ethyl]carbamate

Cas Number:

72490-01-8

Molecular formula:

C17 H19 N O4

IUPAC Name:

ethyl [2-(4-phenoxyphenoxy)ethyl]carbamate

Results and discussion

Any other information on results incl. tables

Results

The majority of radioactivity was recovered from the soil (≥ 89% AR). Trapped volatilised radioactivity was ≤ 0.04% AR. Approximately 3.1 and 6.9% of the total radioactivity volatilised from soil surfaces after 24 hours for the 0.003 m/s and 1 m/s experiment, respectively (and was not recovered in the volatile traps).

 

Table 2. Distribution of radioactivity between volatiles and soil or plant associated residues

Time (hours)	% of applied				% volatilisation(A)
	traps	soil extractables	soil  unextractables	total
	0.003 m/s
0	-	91.61	0.73	92.34	na
1	nd	88.01	0.98	88.99	11.01
3	0.04	101.99	1.38	103.41	0.00
6	0.02	99.78	3.08	102.88	0.00
24	nd	93.71	3.19	96.90	3.10
	1 m/s
0	-	91.61	0.73	92.34	na
24	na	87.57	5.54	93.11	6.90

(A) 100– soil extractables – soil unextractables

nd: not detected

na: not applicable

Applicant's summary and conclusion

Conclusions:

In a volatilisation study in accordance with guideline BBA IV 6-1, 3.1% and 6.9% of applied radioactivity volatilised from the soil surface after 24 hours exposure to air (relative humidity 35%, temp 20 ± 2°C) at 0.003 and 1 m/s, respectively.

Executive summary:

A mixture of [phenoxyphenoxy-U-14C]-labelled test substance and unlabelled test substance was sprayed onto the surface of Speyer 2.1 soil (sand, 0.5% OC, pH 4.8) for studying the volatilisation of the substance. The study was performed by following BBA IV 6-1 guideline and was in compliance with GLP criteria. The treated area was 20.5 cm2 and the dose was equivalent to 146 (0.003 m/s experiment) and 181 g/ha (1 m/s experiment). The moisture content of the soil was brought at 60% of the MWHC. The treated soil was placed in a closed chamber. An air stream (0.003 or 1 m/s) was passed through the chamber (276 mL/min equivalent to 60 air exchanges per hour and 2040 mL/min equivalent to 20571 air exchanges per hour, respectively) for a period of 24 hours. Outgoing air of the 0.003 m/s was passed through two 2-methoxyethanol traps. The temperature was 20 ± 2°C and relative humidity was 35%. Traps and soil of the 0.003 m/s experiment were sampled after 0 (soil), 1, 3, 6 and 24 hours. For the 1 m/s experiment, soil was sampled after 24 hours. Radioactivity in the traps was determined by LSC.

The majority of radioactivity was recovered from the soil (≥ 89% AR). Trapped volatilised radioactivity was ≤ 0.04% AR. The results showed that 3.1% and 6.9% of applied radioactivity volatilised from the soil surface after 24 hours exposure to air at 0.003 and 1 m/s, respectively.