Diethyl sulphate

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

Test material information

Constituent 1

Reference substance name:

Diethyl sulphate

EC Number:

200-589-6

EC Name:

Diethyl sulphate

Cas Number:

64-67-5

Molecular formula:

C4H10O4S

IUPAC Name:

diethyl sulfate

Details on test material:

supplier: Aldrich Chemical
Purity >= 96% (GC determination)

Results and discussion

Any other information on results incl. tables

Reactant	Rate constant (cm^3molecule^-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.