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Diss Factsheets

Physical & Chemical properties

Oxidising properties

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Link to relevant study record(s)

Reference
Endpoint:
oxidising solids
Type of information:
other: read-across study
Adequacy of study:
supporting study
Study period:
2009-07-14 to 2009-07-21
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
UN Manual of Tests and Criteria: Test O.1 (Test for oxidizing solids)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
signed 2004-09-06
Contact with:
powdered cellulose
Duration of test (contact time):
<= 3 min
Sample tested:
reference: 3:2 mixture potassium bromate + cellulose
Parameter:
mean burning time
Result:
21 s
Remarks on result:
other: Mean of five tests
Sample tested:
reference: 2:3 mixture potassium bromate + cellulose
Parameter:
mean burning time
Result:
66 s
Remarks on result:
other: Mean of five tests
Sample tested:
reference: 3:7 mixture potassium bromate + cellulose
Parameter:
mean burning time
Result:
128 s
Remarks on result:
other: Mean of five tests
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
221 s
Remarks on result:
other: Mean of five tests
Sample tested:
4:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
323 s
Remarks on result:
other: Mean of five tests

Due to the fact that both mixtures of the test item with cellulose (4:1 and 1:1) have higher mean burning times compared to the reference mixture in the ratio 3:7, it is concluded that the test item has no oxidizing properties.

Interpretation of results:
GHS criteria not met
Conclusions:
The test item molybdenum trioxide does not meet the classification criteria for oxidizing properties in the sense of the Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, Part 34.4.1 (Test O.1).
The test item molybdenum trioxide does not meet the classification criteria for oxidizing properties in accordance with Regulation (EC) No. 1272/2008 on the classification, labelling and packaging of substances and mixtures ("CLP Regulation").

Description of key information

Sodium molybdate has no oxidising properties (see justification for classification or non-classification).

Key value for chemical safety assessment

Oxidising properties:
non oxidising

Additional information

Justification for classification or non-classification

Read-across from MoO3 to sodium molybdate. In a test for oxidising properties with pure molybdenum oxide (MoO3), both mixtures of the test item MoO3 with cellulose (4:1 and 1:1) had higher mean burning times compared to the reference mixture in the ratio 3:7. It is concluded that the test item pure MoO3 has no oxidizing properties.

Read-across is possible from pure MoO3 to sodium molybdate, since sodium molybdate also contains molybdenum in oxidation state (VI). Also, sodium molybdate (anhydrous) contains a mass fraction of oxygen (39.7 %), similar to molybdenum trioxide (33.3 %). In both compounds, the molybdenum atom is coordinated by oxide. In consequence it is reasonable that, sufficient for non-classification, sodium molybdate like the comparable compound MoO3 would not exhibit oxidising properties.