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Diss Factsheets

Administrative data

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
17 Oct 2017 - 16 Jan 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Series on Testing and Assessment No. 29 (23-Jul-2001): Guidance document on transformation/dissolution of metals and metal compounds in aqueous media
Deviations:
no
GLP compliance:
no
Type of method:
other: shake flask

Test material

Constituent 1
Reference substance name:
Frits, chemicals and bismuth oxide
EC Number:
947-960-5
Molecular formula:
Not applicable
IUPAC Name:
Frits, chemicals and bismuth oxide
Test material form:
solid

Results and discussion

Water solubilityopen allclose all
Water solubility:
30.2 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
10 mg/L
Incubation duration:
2 h
Temp.:
19 °C
pH:
8
Water solubility:
63 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
100 mg/L
Incubation duration:
2 h
Temp.:
19 °C
pH:
8
Water solubility:
78.5 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
1 000 mg/L
Incubation duration:
2 h
Temp.:
19 °C
pH:
8
Water solubility:
41.8 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
10 mg/L
Incubation duration:
6 h
Temp.:
19 °C
pH:
8
Water solubility:
47.9 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
100 mg/L
Incubation duration:
6 h
Temp.:
19 °C
pH:
8
Water solubility:
51 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
100 mg/L
Incubation duration:
6 h
Temp.:
19 °C
pH:
8
Water solubility:
36.9 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
10 mg/L
Incubation duration:
1 d
Temp.:
19 °C
pH:
8
Water solubility:
18.5 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
100 mg/L
Incubation duration:
1 d
Temp.:
19 °C
pH:
8
Water solubility:
39.8 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
1 000 mg/L
Incubation duration:
1 d
Temp.:
19 °C
pH:
8
Water solubility:
13.6 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
10 mg/L
Incubation duration:
2 d
Temp.:
19 °C
pH:
8
Water solubility:
32.3 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
100 µg/L
Incubation duration:
2 d
Temp.:
19 °C
pH:
8
Water solubility:
71.7 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
1 000 mg/L
Incubation duration:
2 d
Temp.:
19 °C
pH:
8
Water solubility:
9.59 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
10 mg/L
Incubation duration:
7 d
Temp.:
19 °C
pH:
8
Water solubility:
25.6 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
100 mg/L
Incubation duration:
7 d
Temp.:
19 °C
pH:
8
Water solubility:
75.9 µg/L
Conc. based on:
element
Remarks:
Bi
Loading of aqueous phase:
1 000 mg/L
Incubation duration:
7 d
Temp.:
19 °C
pH:
8
Details on results:
These are the short term test results. Each result is the mean value from 3 vessels at the specific loading. The maximum Bi concentration observed in an individual vessel was 82.7 ug/L, at 2 h incubation time, and with 1000 mg/L loading.
The long term study was not performed.

Any other information on results incl. tables

Preliminary Test Results - pH Value that Maximizes Dissolved Bismuth Concentration

For preliminary test, 2.5 L pre-cleaned and acid rinsed PE bottles were used. The following results were obtained:

pH planned

pH observed

Test Item added

(mg/L)

Time of shaking

(h)

Bismuth concentration

(µg/L)

5.5

5.6

100.2

24

n.d.

6

6.0

100.7

24

n.d.

7

7.0

99.9

24

n.d.

8

7.8

 

100.1

24

 

45.0

n.d. = not detectable (<0.505 µg/L Bi)

Within the tested range from pH 5.5 to 8, the vessel at pH 8 showed a higher concentration than the other tested pH values. Therefore the main test was performed at pH 8.

Screening Transformation/Dissolution Test

For screening test 3.5 L pre-cleaned and acid rinsed 3.5 L glass bottles were used. The following results were obtained:

Sample

Test Item added(mg/L)

Bismuth concentration(µg/L)

Mean bismuth concentration (µg/L)

Blank1-1

Blank1-2

-

n.d.

n.d.

 

n.d.

Blank1-3

 

n.d.

 

Blank2-1

 

n.d.

 

Blank2-2

-

n.d.

n.d.

Blank2-3

 

n.d.

 

Vessel1-1

 

20.1

 

Vessel1-2

100.4

20.2

20.2

Vessel1-3

 

20.3

 

Vessel2-1

 

17.2

 

Vessel2-2

100.0

17.1

17.1

Vessel2-3

 

17.2

 

Vessel3-1

 

18.1

 

Vessel3-2

100.8

18.0

18.1

Vessel3-3

 

18.2

 

Vessel4-1

 

20.9

 

Vessel4-2

99.8

20.8

20.9

Vessel4-3

 

20.9

 

Vessel5-1

 

17.6

 

Vessel5-2

99.9

17.7

17.9

Vessel5-3

 

18.4

 

 

 

Mean:

18.8

n.d. = not detectable (<0.505 µg/L Bi)

Short Term Test Results

The short term test at pH 8 was performed as described in methods section. For short term test 3.5 L pre­cleaned and acid rinsed glass bottles were used. The results of the short term test are given in the ‘Results and discussion section’. All vessels were analyzed for bismuth before shaking, and all were non-detect for Bismuth (<0.505 ug/L Bi).

The maximum Bi concentration observed in an individual vessel was 82.7 ug/L, at 2 h incubation time, and with 1000 mg/L loading.

The long term test was not performed.

Applicant's summary and conclusion