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Reference
Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
14th to 15th July 2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
Total number of replicates was 5 instead of 6 as indicated by the test guideline. No results of the individual replicates were provided.
Qualifier:
according to guideline
Guideline:
EU Method A.17 (Oxidising Properties (Solids))
Deviations:
yes
Remarks:
Five instead of 6 replicates were performed. No detailed results on the individual replicates were provided and thus the difference from the arithmetic mean could not be assessed.
GLP compliance:
no
Contact with:
powdered cellulose
Sample tested:
test mixture (not specified)
Parameter:
maximum burning rate
Result:
0.606 mm/s
Remarks on result:
other: 90% cellulose / 10% test material
Sample tested:
reference mixture (not specified)
Parameter:
maximum burning rate
Result:
0.909 mm/s
Remarks on result:
other: 100% cellulose
Sample tested:
reference mixture (not specified)
Parameter:
maximum burning rate
Result:
0.975 mm/s
Remarks on result:
other: 40% cellulose / 60% BaNO3

The results in below table are the average of 5 runs, where complete combustion was recorded.

Burn time over 200 mm  Mixture (cellulose to substance)   Burn rate (mm/s)
 3 min 40s  100:0  0.909
 5 min 30s  90:10  0.606
 Stopped after 100 mm  80:20  NA
 Did not propagate  50:50  NA
 3 min 25s  40:60 (BaNO3)  0.975

Observations: during the test the flame observed with the barium nitrate / cellulose mixture was a green/yellow flame, where the flame was readily visible throughout the test, while with the only propagated zirconium dichloride oxide (ZOC) test (10% ZOC / 90% cellulose) the yellow flame was only very occasionally visible, and the combustion was much less vigorous.

Interpretation of results:
GHS criteria not met
Conclusions:
Zirconium dichloride oxide is considered not to have oxidising properties as the burning rates obtained are below the burning rate of the cellulose/BaNO3 sample.

Description of key information

Zirconium dichloride oxide is concluded not to have oxidising properties based on the results of an EC A.17 test (Butler, 2010).

Key value for chemical safety assessment

Oxidising properties:
non oxidising

Additional information

In the test performed by Butler (2010), the maximum burning rates of the test material/cellulose mixtures were below the burning rates obtained for the reference mixture. Therefore, zirconium dichloride oxide was concluded not to have oxidising properties.

Justification for classification or non-classification

Zirconium dichloride oxide is concluded not to have oxidising properties based on the results of an EC A.17 test (Butler, 2010).