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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:
supporting study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
Performed in accordance to the general guidance given in the draft OECD Transformation/Dissolution protocol. The experimental design includes the refinements, agreed by the ad hoc OECD Validation Management Group (VMG), as described in the Standard Operating Procedures prepared by CANMET and LISEC

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2009
Report date:
2009

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: General guidance given in the draft OECD Transformation/Dissolution protocol. The experimental design includes the refinements, agreed by the ad hoc OECD Validation Management Group (VMG), as described in the Standard Operating Procedures prepared by CANM
Deviations:
no
Remarks:
There were no deviations in the actual tests performed.
GLP compliance:
yes
Remarks:
OECD Principles on Good Laboratory Practice (as revised in 1997), ENV/MC/CHEM(98)17
Type of study / information:
The information relates to manganese leaching out of the test substance into environmentally relevant water at pH 6, and provides a concentration of the metal in water after both 7 days (1,10 and 100 mg/L loading) and 28 days (1mg/L loading)

Test material

Constituent 1
Chemical structure
Reference substance name:
Manganese oxide
EC Number:
215-695-8
EC Name:
Manganese oxide
Cas Number:
1344-43-0
Molecular formula:
MnO
IUPAC Name:
manganese oxide
Details on test material:
- Name of test material (as cited in study report): manganese oxide
- Physical state: solid

Results and discussion

Any other information on results incl. tables

Manganese oxide : summary of the results for the 24 h screening tests, 100 mg/L loading at pH 6,7 and 8 with an agitation of 200 RPM

pH 6

Blanks

100 mg/L loading

Time, h

Mn, µg/L   S.D.

Mn, µg/L   S.D.

0

0.4

0.24

3.2

0.57

24

0.4

0.89

2399.9

389.44

pH 7

Blanks

100mg/L loading

Time, h

Mn, µg/L   S.D.

Mn, µg/L   S.D.

0

0.3

0.17

2.1

0.26

24

0.6

0.30

52.1

1.65

pH 8

Blanks

100 mg/L loading

Time, h

Mn, µg/L   S.D.

Mn, µg/L   S.D.

0

0.5

0.39

1.6

0.88

24

0.3

0.32

20.2

18.90

Manganese oxide: summary of the results of transformation / dissolution tests for 7 days at 10 and 100 mg/L loading and 28 days 1mg/L loading, performed at pH 6 with 100 RPM agitation.

 

Blanks

1 mg/L loading

Time, h

Mn, µg/L   S.D.

Mn, µg/L   S.D.

0

0.2

0.16

0.5

0.12

168

0.3

0.32

157.9

16.58

672

0.5

0.20

456.4

52.37

 

Blanks

10 mg/L loading

Time, h

Mn, µg/L   S.D.

Mn, µg/L   S.D.

0

 0.2

 0.10

 0.7

 0.14

168

 0.5

 0.60

 1862.7

 174.23

 

Blanks

100 mg/L loading

Time, h

 

 

0

 0.2

 0.1

 4.2

 1.42

168

 0.5

 0.60

 8803.1

 99.17

Applicant's summary and conclusion

Conclusions:
The leaching results for MnO do not lead to any environmental classification.