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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
monitoring data
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
2009

Materials and methods

Test guideline
Qualifier:
no guideline followed
GLP compliance:
no
Type of measurement:
background concentration
Media:
other: Wastewater, surface water, groundwater, drinking water. See details below.

Test material

Constituent 1
Chemical structure
Reference substance name:
6-methyl-1,2,3-oxathiazin-4(3H)-one 2,2-dioxide, potassium salt
EC Number:
259-715-3
EC Name:
6-methyl-1,2,3-oxathiazin-4(3H)-one 2,2-dioxide, potassium salt
Cas Number:
55589-62-3
Molecular formula:
C4H5NO4S.K
IUPAC Name:
potassium 6-methyl-2,2,4-trioxo-3,4-dihydro-1,2λ⁶,3-oxathiazin-3-ide
Constituent 2
Reference substance name:
Acesulfam K
IUPAC Name:
Acesulfam K
Test material form:
solid: crystalline
Details on test material:
- Name of test material (as cited in study report): Acesulfame K; 6-methyl-1,2,3-oxathiazin-4(3H)-one 2,2-dioxide, potassium salt
- Analytical purity: 99%

Results and discussion

Concentrationopen allclose all
Country:
Switzerland
Location:
Wastewater treatment plant Gossau, Canton of Zurich
Substance or metabolite:
substance
Conc.:
43 µg/L
Remarks on result:
other: Highest value measured in the influent of a WWTP
Country:
Switzerland
Location:
Wastewater treatment plant Gossau, Canton of Zurich
Substance or metabolite:
substance
Conc.:
46 µg/L
Remarks on result:
other: Highest value measured in the effluent of one WWTP (worst case value of all STPs).
Country:
Switzerland
Substance or metabolite:
substance
Conc.:
11 other: Capita load given as mg/person/day
Remarks on result:
other: Capita load, calculated as the mean of the effluent values of ten WWTPs.
Country:
Switzerland
Location:
River Glatt at its source (Lake Greifensee)
Substance or metabolite:
substance
Conc.:
2.8 µg/L
Country:
Switzerland
Location:
River Glatt at its outlet to the river Rhine
Substance or metabolite:
substance
Conc.:
6.9 µg/L
Remarks on result:
other: Between the source and the outlet of the river Glatt, on a distance of about 35 km, wastewater from 7 additional wastewater treatment plants is discharged.
Country:
Switzerland
Location:
Groundwater sample taken from the river Glatt at its outlet to the river Rhine (km 35)
Substance or metabolite:
substance
Conc.:
4.7 µg/L
Remarks on result:
other: Waste water of seven treatment plants was discharged between the source an the outlet of the river, resulting in a waste water burden of 100% at this sampling point.
Country:
Switzerland
Substance or metabolite:
substance
Conc.:
2.6 µg/L
Remarks on result:
other: Tap water sample (raw drinking water) taken from the lower Glatt valley. The highest concentrations of acesulfam K in the groundwater were observed here.
Country:
Switzerland
Substance or metabolite:
substance
Conc.:
ca. 0.02 - 0.07 µg/L
Remarks on result:
other: Finished drinking water after ozonisation of lake water.

Applicant's summary and conclusion

Conclusions:
Based on its persistence, its ubiquitous occurence in the environment, and its easy analytical detectability, the authors concluded that acesulfame K is an ideal marker to reflect a contamination of surface water and groundwater with domestic wastewater.