Registration Dossier

Environmental fate & pathways

Additional information on environmental fate and behaviour

Administrative data

Endpoint:
additional information on environmental fate and behaviour
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The study is well described, no guideline is available.

Data source

Reference
Reference Type:
publication
Title:
Atmospheric Chemistry of Gaseous Diethyl Sulfate
Author:
Japar SM, Wallington TJ, Andino JM, Ball JC
Year:
1990
Bibliographic source:
Environ Sci Technol 24: 894-897

Materials and methods

Test guideline
Qualifier:
no guideline available
Principles of method if other than guideline:
Atmospheric reactivity with O3, NH3 and H2O determined by FTIR spectroscopy.
Reactivity toward OH radicals and Cl atoms determined by relative rate techniques
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
supplier: Aldrich Chemical
Purity >= 96% (GC determination)

Results and discussion

Any other information on results incl. tables

Reactant

Rate constant

(cm3molecule-1s-1)

Lifetime

Ozone

< 3.4 10-21

> 12 years

OH

1.8 10-12

6.4 days

Cl

1.1 10-11

1.4 years

NH3

< 1.4 10-21

> 9 years

H2O

<2.3 10-21

≥1.0 days

'Calculated for clean tropospheric conditions:[03] = 7.5 X 1011cm-3(30 ppb); [OH] = 1 x 106cm-3; [Cl] = 2 X 103cm-3. [NH3] 2.5 X 1012cm-3(100 ppb); [H2O] = 15 Torr.

Applicant's summary and conclusion

Conclusions:
With the possible exception of its reaction with water, these results indicate that the atmospheric fate of DES within an urban air parcel is not determined by its homogeneous gas-phase reactions with any of the atmospheric species studied.
Executive summary:

The atmospheric reactivity of diethyl sulfate (DES) has been investigated. Upper limits to the rate constants (in cm3 molecule -1 s-1) for the homogeneous gas-phase reactions of DES with O3, NH3, and H2O have been determined by FTIR spectroscopy and are <3.4 X1 0-21, <1.4 X1 0-21,and _< 2.3 x 10-23,respectively. The reactivity of DES toward OH radicals and Cl atoms has been determined by using relative rate techniques; rate constants for those reactions are (1.8 ± 0.7) x 10-12and (1.1 ± 0.1) x 10-11,respectively. These rate constants correspond to atmospheric lifetimes ranging from > 1 day with respect to with water to >12 years with respect to ozone. With the possible exception of its reaction with water, these results indicate that the atmospheric fate of DES within an urban air parcel is not determined by its homogeneous gas-phase reactions with any of the atmospheric species studied.