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Reference
Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
18 September 2017 to 20 September 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))
Version / remarks:
2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Contact with:
powdered cellulose
Key result
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
burning rate
Remarks on result:
mixture does not ignite and burn
Key result
Sample tested:
4:1 sample-to-cellulose ratio
Parameter:
burning rate
Remarks on result:
mixture does not ignite and burn
Key result
Sample tested:
reference mixture as specified
Remarks:
Nitrate: Cellulose Ratio (10:90)
Parameter:
burning rate
Result:
0.49 mm/s
Key result
Sample tested:
reference mixture as specified
Remarks:
Nitrate: Cellulose Ratio (20:80)
Parameter:
burning rate
Result:
0.58 mm/s
Key result
Sample tested:
reference mixture as specified
Remarks:
Nitrate: Cellulose Ratio (30:70)
Parameter:
burning rate
Result:
0.4 mm/s
Key result
Sample tested:
reference mixture as specified
Remarks:
Nitrate: Cellulose Ratio (40:60)
Parameter:
burning rate
Result:
0.56 mm/s
Key result
Sample tested:
reference mixture as specified
Remarks:
Nitrate: Cellulose Ratio (50:50)
Parameter:
burning rate
Result:
0.71 mm/s
Key result
Sample tested:
reference mixture as specified
Remarks:
Nitrate: Cellulose Ratio (60:40)
Parameter:
burning rate
Result:
0.83 mm/s
Key result
Sample tested:
reference mixture as specified
Remarks:
Nitrate: Cellulose Ratio (70:30)
Parameter:
burning rate
Result:
0.9 mm/s
Key result
Sample tested:
reference mixture as specified
Remarks:
Nitrate: Cellulose Ratio (80:20)
Parameter:
burning rate
Result:
1.25 mm/s
Key result
Sample tested:
reference mixture as specified
Remarks:
Nitrate: Cellulose Ratio (90:10)
Parameter:
burning rate
Result:
1.74 mm/s

Table 1: Reference Mixtures

Barium Nitrate: Cellulose Ratio

Observations

Burning Time (min:s)

Burning Rate (mm/s)

10:90

Green flame with blue edges, orange sparks with light grey fumes

6:46

0.49

20:80

Green flame with blue edges, orange sparks with grey fumes

5:46

0.58

30:70

Green flame with blue edges, orange sparks with light grey fumes

8:25

0.40

40:60

Green flame with blue edges, orange sparks with light grey fumes

5:56

0.56

50:50

Green/orange flame, orange sparks with light grey fumes

4:43

0.71

60:40

Green/orange flame, orange sparks with light grey fumes

4:02

0.83

70:30

Green/orange flame, orange sparks with light grey fumes

3:43

0.90

80:20

Green/orange flame, orange sparks with light grey fumes

2:40

1.25

90:10

Green/orange flame, orange sparks with light grey fumes

1:55

1.74

Maximum burning rate: 1.74 mm/s

Table 2: Sample Mixtures

Test Material: Cellulose Ratio

Observations

Burning Time (min:s)

Burning Rate (mm/s)

10:90

Green flame with blue edges, orange sparks with light grey fumes

0:51

N/A

20:80

Green flame with blue edges, orange sparks with grey fumes

0:26

N/A

30:70

Green flame with blue edges, orange sparks with light grey fumes

-

N/A

40:60

Green flame with blue edges, orange sparks with light grey fumes

-

N/A

50:50

Green/orange flame, orange sparks with light grey fumes

-

N/A

60:40

Green/orange flame, orange sparks with light grey fumes

-

N/A

70:30

Green/orange flame, orange sparks with light grey fumes

-

N/A

80:20

Green/orange flame, orange sparks with light grey fumes

-

N/A

90:10

Green/orange flame, orange sparks with light grey fumes

-

N/A

The test material:cellulose sample mixtures failed to support/propagate combustion over the full 200 mm of the test and so burning rates could not be calculated. This demonstrated the test material did not have oxidising properties.

Interpretation of results:
other: Not classified in accordance with EU criteria
Conclusions:
Under the conditions of this study the test material has been determined not to have oxidising properties.
Executive summary:

The oxidising properties of the test material were investigated in accordance with the standardised guideline EU Method A.17, under GLP conditions.

Reference mixtures were prepared by mixing barium nitrate and cellulose in a range of ratios (10 to 90% by weight). Similarly, sample mixtures were prepared by mixing test material and cellulose in a range of ratios (10 to 90% by weight). A mould (250 mm long x 20 mm wide x 10 mm high) was loosely filled with a slight excess of each mixture in turn. The mould was dropped from a height (approximately 2 cm) onto a solid surface. Any excess mixture was scraped off and the lateral limitations of the mould removed. The remaining mixture was smoothed using a roller. A non-porous, non-combustible board was placed on top of the mould which was then inverted and carefully removed forming a pile of the mixture. One end of the pile was ignited using an air-rich Bunsen burner flame. The time taken for the reaction zone to travel over a distance of 200 mm and details of the mode of reaction, after propagating an initial distance of 30 mm, were recorded.

The test material:cellulose sample mixtures failed to support/propagate combustion over the full 200 mm of the test and so burning rates could not be calculated.

Under the conditions of this study the test material has been determined not to have oxidising properties.

Description of key information

Under the conditions of this study the test material has been determined not to have 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 guideline EU Method A.17, under GLP conditions.

Reference mixtures were prepared by mixing barium nitrate and cellulose in a range of ratios (10 to 90% by weight). Similarly, sample mixtures were prepared by mixing test material and cellulose in a range of ratios (10 to 90% by weight). A mould (250 mm long x 20 mm wide x 10 mm high) was loosely filled with a slight excess of each mixture in turn. The mould was dropped from a height (approximately 2 cm) onto a solid surface. Any excess mixture was scraped off and the lateral limitations of the mould removed. The remaining mixture was smoothed using a roller. A non-porous, non-combustible board was placed on top of the mould which was then inverted and carefully removed forming a pile of the mixture. One end of the pile was ignited using an air-rich Bunsen burner flame. The time taken for the reaction zone to travel over a distance of 200 mm and details of the mode of reaction, after propagating an initial distance of 30 mm, were recorded.

The test material:cellulose sample mixtures failed to support/propagate combustion over the full 200 mm of the test and so burning rates could not be calculated.

Under the conditions of this study the test material has been determined not to have 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.