Registration Dossier

Administrative data

Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
15 May 2013 to 17 March 2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Conducted according to current test guidelines and GLP compliant

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2014
Report Date:
2014

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method A.17 (Oxidising Properties (Solids))
Deviations:
no
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Type:
Constituent
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder
Details on test material:
Name: Oxypyrion acetate
CAS Number: 1742-78-6
Batch number: 14058400
Purity: 97.83%
Date of arrival: 22 April 2013
Expiry date: 30 November 2013
Storage conditions: Refrigerated (2 to 8°C)

Study design

Contact with:
powdered cellulose
Duration of test (contact time):
2 min

Results and discussion

Test results (Oxidising solids)open allclose all
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
burning time of reaction over a distance of 200 mm
Result:
141 s
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
burning rate
Result:
1.42 mm/s
Sample tested:
reference mixture as specified
Remarks:
60% barium nitrate/40% Cellulose
Parameter:
burning time of reaction over a distance of 200 mm
Result:
140 s
Sample tested:
reference mixture as specified
Remarks:
60% barium nitrate/40% Cellulose
Parameter:
burning rate
Result:
1.43 mm/s
Sample tested:
test mixture as specified
Remarks:
60%Ba(NO3 )2 / 40%Kieselguhr
Parameter:
burning rate
Result:
0 mm/s
Remarks on result:
mixture does not ignite and burn
Sample tested:
test mixture as specified
Remarks:
1:1 test item: Kieselgur
Parameter:
burning rate
Result:
1.2 mm/s

Any other information on results incl. tables

Preliminary test

The Oxypyrion acetate/ cellulose mixture ignited almost immediately when the flame came in contact with it. The mixture burnt with a yellow/orange flame and produced black smoke. The whole sample burned through in approximately 4 minutes, quietly with no vigorous reaction.

Train test

For the 10%, 20%, 30% and 40% mixtures of test substance with cellulose, the train burnt along the outer surface with wicking. Unburnt material was found in the core of the train after the test was completed.

For the 60% mixture of test substance with cellulose, the train ignited almost immediately on contact with the flame, a yellow flame and black smoke were produced. The train burned along outer surface only. Unburnt material was found in the core of the train after the test was completed.

For the 70% mixture of test substance with cellulose, the train ignited and burnt with a yellow flame, a large amount of black smoke was also produced. The flame wicked along the surface. Unburnt material was found in the core of the train after the test was completed.

For the 80% mixture of test substance with cellulose, the train burnt slowly with a yellow flame and black smoke. The train also melted and cooled to leave a black residue.

For the 90% mixture of test substance with cellulose, the end of the train melted but no burning or ignition occurred during the 2-minute period of heating.

As the burning rates of the test substance mixtures at 30%, 40% and 50% were the highest giving burning rates of 1,38; 1,45 and 1,42 mm/second, respectively, the test was then repeated a further five times for each of these mixtures. The maximum burning rate for the Oxypyrion acetate/cellulose mixtures in this further test was 1,38 mm/sec at 40% test substance, which compared with 1,43mm/sec for the 60% reference substance mixture.

This suggested Oxypyrion acetate may be oxidising and further evaluation was carried out, using Kieselguhr instead of cellulose, in order to check for a false positive test.

 

Burning Rates – Oxidising Properties Train Test

 

 

Train Test

 

 

Barium nitrate reference substance:

Nominal proportion (%)

Weight of Ba(NO3)2(g)

Weight of cellulose (g)

Distance burned (mm)

Burning time (sec)

Burning rate (mm/sec)

60

17,97

11,97

200

140

1,43*

 

 

 

 

 

Oxypyrion acetate test substance:

Nominal proportion (%)

Weight of Test Substance (g)

Weight of cellulose (g)

Distance burned (mm)

Burning time (sec)

Burning rate (mm/sec)

10

1,53

13,49

200

255

0,78

20

3,00

11,96

200

163

1,23

30

5,97

14,02

200

145

1,38

40

7,99

12,00

200

138

1,45

50

9,91

9,90

200

141

1,42

60

11,99

8,01

200

175

1,14

70

13,99

6,10

200

170

1,18

80

12,06

3,08

200

416

0,48

90

13,47

1,56

Did not ignite or burn

* A previous reference substance test had been carried out with 18,02 g of barium nitrate plus 11,99 g of cellulose. This gave a burning time over 200 mm of 250 seconds, which gave a burning rate of 0,8 mm/second. As this was below the expected value of 1 mm/second, the procedure was repeated.

 

False positive test

The mixtures at 10 and 20 % Oxypyrion acetate failed to ignite.For the mixture at 30%, burning occurred along the outer surface and the flameextinguished after 77 mm.

For the mixtures at 40%, 50% and 60%, a flame was observed to wick along the outersurface of the train leaving unburnt test substance on the inside of the train. The flame was yellow and gave off sooty smoke.For the mixtures at 70% and 80%, a flame was observed to wick along the outer surface of the train leaving unburnt test substance in the core of the train. The train also partly melted leaving a black residue.

For the mixture at 90%, the end of the train melted, no burning or ignition occurred within the 2-minute test period.

The burning rates in the presence of Kieselguhr were slightly lower than those of any mixtures containing cellulose but the pattern of burning rates was similar. This indicates that Oxypyrion acetate cannot be oxidising because an oxidising material would show no propagation of any reaction through any of the mixtures of the test substance and Kieselguhr. Full results are shown inTable 4. The burning characteristics recorded throughout the test are not indicative of oxidation.The calculated oxygen balance does not indicate that Oxypyrion acetate is likely to be oxidising.

It is therefore concluded, that the high burning rates seen in the presence of cellulose are attributable to true burning of the Oxypyrion acetate/cellulose mixtures and not to an oxidising reaction.

Substance  Nominal proportion (%  Weight of Substance or Reference (g)    Weight of Kieselguhr (g)  Distance burned (mm)   Burning time (sec)    Burning rate (mm/sec)
 Barium nitrate reference substance 60   1.50  13.51  Did not ignite or burn    

Test substance

 

10

20

30

40

50

60

70

80

90

1,50

2,98

4.46

5.97

7.48

8.98

10.50

11.97

13.50

  

13.51

11.96

10.49

8.96

7.52

5.98

4.49

2.99

1.54 

  

Did not ignite or burn

77

200

200

200

200

200

200

 

Did not ignite or burn

89

152

166

158

181

194

Did not ignite or burn

 

 

Oxypyrion acetate is not considered to be oxidising.

Table 4 Burning Rates – Oxidising Properties False Positive Test

Applicant's summary and conclusion

Interpretation of results:
other: no oxidising properties
Remarks:
Migrated information
Conclusions:
Oxypyrionacetate was not considered to have oxidising properties.