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EC number: - | CAS number: -
Oxidising properties
Administrative data
Link to relevant study record(s)
- Endpoint:
- oxidising liquids
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 25 July 2019 to 13 August 2019
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.21 (Oxidising Properties (Liquids))
- Version / remarks:
- 2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Contact with:
- powdered cellulose
- Duration of test (contact time):
- 60 s
- Key result
- Sample tested:
- test mixture 1:1
- Parameter:
- mean pressure rise time
- Remarks on result:
- other: mean pressure rise time greater than that observed for the nitric acid reference sample.
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- The sample of test item was found to have a mean pressure rise time greater than that observed for the nitric acid reference sample. The sample is therefore not considered to be an oxidising liquid.
- Executive summary:
GUIDELINE
The test was conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A.21.
METHODS
The test is designed to determine the potential for a liquid substance to increase the burning rate or burning intensity of a combustible substance when the two are thoroughly mixed, or to form a mixture which spontaneously ignites. The test method measures the pressure rise time during deflagration. The test liquid is mixed in a 1:1 ratio (by mass) with fibrous cellulose and the mixture heated in a pressure vessel to evaluate the rate of pressure rise. The results are compared with data obtained in the same equipment for a mixture of cellulose with a known, characterised oxidant.
RESULTS
The sample of test item was found to have a mean pressure rise time greater than that observed for the nitric acid reference sample. The sample is therefore not considered to be an oxidising liquid.
Reference
RESULTS
- Graph 11.A (attached) illustrates the time / pressure data from Test 5.
- The sample of test item was found to have a mean pressure rise time greater than that observed
for the nitric acid reference sample. The sample is therefore not considered to be an oxidising
liquid.
TABLE 11.1 – CELLULOSE DRIED AT 105 °C FOR APPROXIMATELY 42 HOURS
Tray No |
Tray weight (g) |
Tray & wet weight powder weight (g) |
Tray & dry powder weight (g) |
Weight of sample before drying (g) |
Weight of sample after drying (g) |
Moisture loss (g) |
Moisture loss (%) |
1 |
473.5 |
595.5 |
590.6 |
121.6 |
116.7 |
4.9 |
4.0 |
TEST RESULTS
|
Test item:cellulose (1:1) |
65 % nitric acid: cellusose (1:1) |
Test 1 pressure rise time (s) |
15.868 |
2.897 |
Test 2 pressure rise time (s) |
9.687 |
3.511 |
Test 3 pressure rise time (s) |
11.182 |
3.102 |
Test 4 pressure rise time (s) |
10.616 |
2.814 |
Test 5 pressure rise time (s) |
14.810 |
2.713 |
Mean pressure rise time (s) |
12.433 |
3.007 |
30 % of mean value (s) |
3.730 |
0.902 |
Acceptable data range (s) |
8.703 to 16.162 |
2.105 to 3.910 |
Description of key information
The sample of test item was found to have a mean pressure rise time greater than that observed for the nitric acid reference sample. The substance is therefore not considered to be an oxidising liquid (EU Method A.21).
Key value for chemical safety assessment
- Oxidising properties:
- non oxidising
Additional information
GUIDELINE
The test was conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A.21.
METHODS
The test is designed to determine the potential for a liquid substance to increase the burning rate or burning intensity of a combustible substance when the two are thoroughly mixed, or to form a mixture which spontaneously ignites. The test method measures the pressure rise time during deflagration. The test liquid is mixed in a 1:1 ratio (by mass) with fibrous cellulose and the mixture heated in a pressure vessel to evaluate the rate of pressure rise. The results are compared with data obtained in the same equipment for a mixture of cellulose with a known, characterised oxidant.
RESULTS
The sample of test item was found to have a mean pressure rise time greater than that observed for the nitric acid reference sample. The sample is therefore not considered to be an oxidising liquid.
Justification for classification or non-classification
The sample of test item was found to have a mean pressure rise time greater than that observed for the nitric acid reference sample. Classification in accordance with Regulation (EC) No 1907/2006 and subsequent amendments is therefore not required.
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