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Reference
Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
05 October 2017 to 13 December 2017
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)
Version / remarks:
2015
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.17 (Oxidising Properties (Solids))
Version / remarks:
2016
Deviations:
no
GLP compliance:
yes
Contact with:
powdered cellulose
Duration of test (contact time):
3 min
Key result
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
burning rate
Result:
> 180 s
Key result
Sample tested:
4:1 sample-to-cellulose ratio
Parameter:
burning rate
Result:
> 180 s
Key result
Sample tested:
reference: 3:7 mixture potassium bromate + cellulose
Parameter:
burning rate
Result:
107 s
Key result
Sample tested:
reference: 2:3 mixture potassium bromate + cellulose
Parameter:
burning rate
Result:
47 s
Key result
Sample tested:
reference: 3:2 mixture potassium bromate + cellulose
Parameter:
burning rate
Result:
17 s

- The mean burning time of both test material mixtures was more than the mean burning time of the 3:7 (w/w) reference mixture. According to this, the test material has no oxidising properties.

Interpretation of results:
other: Not classified in accordance with EU criteria.
Conclusions:
Under the conditions of this study, it is concluded that the test material had no oxidising properties.
Executive summary:

The oxidising properties of the test material were investigated in accordance with the standardised guidelines UN Test O.1. and EU Method A.17, under GLP conditions.

Mixtures of potassium bromate and cellulose in a 3:7, 2:3 and 3:2 (w/w) ratio were prepared. The test material-cellulose mixtures were prepared at a 4:1 and 1:1 (w/w) ratio. The burning time of the mixtures was determined, if applicable. The recorded burning time was taken from when the power was switched on to the end of the main reaction i.e. a flame, incandescence or glowing combustion. The reference and test material mixtures were tested 5 times, tests were performed at 20.3 °C.

The mean burning time of both test material mixtures was more than the mean burning time of the 3:7 (w/w) reference mixture. 

Under the conditions of this study, it is concluded that the test material had no oxidising properties.

Description of key information

Under the conditions of this study, it is concluded that the test material had no oxidising properties.

Key value for chemical safety assessment

Oxidising properties:
non oxidising

Additional information

The oxidising properties of the test material were investigated in accordance with the standardised guidelines UN Test O.1. and EU Method A.17, under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

Mixtures of potassium bromate and cellulose in a 3:7, 2:3 and 3:2 (w/w) ratio were prepared. The test material-cellulose mixtures were prepared at a 4:1 and 1:1 (w/w) ratio. The burning time of the mixtures was determined, if applicable. The recorded burning time was taken from when the power was switched on to the end of the main reaction i.e. a flame, incandescence or glowing combustion. The reference and test material mixtures were tested 5 times, tests were performed at 20.3 °C.

The mean burning time of both test material mixtures was more than the mean burning time of the 3:7 (w/w) reference mixture. 

Under the conditions of this study, it is concluded that the test material had no oxidising properties.

Justification for classification or non-classification

In accordance with the criteria for classification as defined in Annex I, Regulation (EC) No 1272/2008, the substance does not require classification with respect to oxidising properties.