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Reference
Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
07.-18.09.2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.17 (Oxidising Properties (Solids))
GLP compliance:
no
Key result
Sample tested:
test mixture as specified
Remarks:
2/1: test item/cellulose
Parameter:
preliminary test
Result:
> 487 - < 495 s
Key result
Sample tested:
reference mixture as specified
Remarks:
barium nitrate and cellulose
Parameter:
maximum burning rate
Result:
2.41 mm/s
Key result
Sample tested:
test mixture as specified
Remarks:
10-90 % Test item and cellulose
Parameter:
maximum burning rate
Result:
0.71 mm/s

Preliminary test:


Three test mixtures with the test item and cellulose 2:1 burned down completely in 495 s, 489 s an 487 s, respectively.


Three test mixtures with barium nitrate/cellulose 2:1 burned down completely in 63 s, 64 s and 60 s, respectively.


Due to the results of the preliminary test the main test had to be performed.


 


Main test:


Four tests were performed for the reference mixture (barium nitrate and cellulose) with 50, 55, 60 and 70 wt. % oxidizer (barium nitrate). The results are shown in Table 1.


Table 1: Burning times and rates of reference mixtures






























Barium nitrate [wt. %]Burning time over 200 mm [s]Burning rate [mm/s]
501381.45
55882.27
60832.41
70114

1.75



The highest burning rate of 2.41 mm/s was found for the mixture with 60 wt. % oxidizer.


Mixtures of the test item with cellulose were prepared in between 10 and 90 wt. % of the test item and tested. Table 2 shows the results.


Table 2: Burning times and rates of test item mixtures



































Test item [%]Burning time over 200 mm [s]Burning rate [mm/s]
102800.71
203870.52
304830.41
608620.23
90The mixture could not be ignited

---



Due to the fact that the maximum burning rate of the mixtures of the test item with cellulose is lower than the maximum burning rate of the reference mixture, six tests were performed only with the three mixtures (10, 20 and 30 wt.% of the test item) with the highest burning rates to verify these values (see Table 3).


Table 3: Burning times and rates of the fastest test item mixtures

































































Test:t [s]V [mm/s]t [s]V [mm/s]t [s]V [mm/s]t [s]V [mm/s]t [s]V [mm/s]t [s]V [mm/s]
10 %2800.712700.742650.762820.712750.732800.71
20 %3870.523890.513750.533900.513820.523800.53
30 %4830.414650.434700.424720.424670.43478

0.42



Each mixture was measured 6 times. The mean burning rate for the mixture with the highest burning rate (10 %) was 0.76 mm/s. The difference between the mean burning rate and the maximum burning rate was <= 10 % for this mixture.


The maximum burning rate of the mixtures of the test item and cellulose (0.76 mm/s) was lower than the maximum burning rate of the reference mixture of cellulose and barium nitrate (2.41 mm/s).


Due to the fact that the mixture of the test ite with cellulose burned slower compared to the reference mixture it was concluded that the test item has no oxidising properties.

Interpretation of results:
GHS criteria not met
Conclusions:
The test item has no oxidising properties.
Executive summary:

A test according to EC Method A.17 has been performed with the substance. As a result, the substance had no oxidising properties in the sense of the European Commission Regulation (EC) No. 440/2008, method A.17.

Description of key information

A test according to EC Method A.17 has been performed with the substance. As a result, the substance had no oxidising properties in the sense of the European Commission Regulation (EC) No. 440/2008, method A.17.

Key value for chemical safety assessment

Oxidising properties:
non oxidising

Additional information

Justification for classification or non-classification