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Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising liquids

Type of information:

experimental study

Adequacy of study:

key study

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.2 (Test for oxidizing liquids)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and lot/batch number of test material: 4133/00-K0
- Expiration date of the lot/batch: June 08, 2021
- Purity test date: Certificate dated from December 03, 2020, Umicore, Germany

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Room temperature (10°C to 30 °C), dark, dry

FORM OF TEST MATERIAL
- Content: Pt 1.820 % (ICP-OES)
- Form: liquid
- Appearance: Pale yellow clear liquid

Contact with:

other: fibrous cellulose

Duration of test (contact time):

10 min

Sample tested:

test mixture 1:1

Parameter:

mean pressure rise time

Remarks on result:

other: in three out of the five measurements the pressure of 2070 kPa could not be reached and two measurements showed a more than 10-fold higher pressure rise time than that of a 1:1 mixture, by mass, of 65 % (w/w) nitric acid and cellulose

Table 1: Pressure rise time for the 1:1 mixtures, by mass, of 65 % nitric acid and cellulose

	Test 1	Test 2	Test 3	Test 4	Test 5	Mean value	Quality criteria
Time at 690 kPag in s	13.32	14.87	13.24	11.37	0.99
Time at 2070 kPag in s	16.08	18.75	16.74	14.40	3.96
Pressure rise time in s	2.77	3.88	3.50	3.03	2.97	3.23	-30 % 2.26	+30% 4.20

 

Table 2: Pressure rise time for the 1:1 mixtures, by mass, of test item and cellulose

	Test 1	Test 2	Test 3	Test 4	Test 5	Mean value	Quality criteria
Time at 690 kPag in s	37.59	23.10	-*	21.59	29.50
Time at 2070 kPag in s	-*	-*	-*	61.87	70.60
Pressure rise time in s	-*	-*	-*	40.28	41.10	-*	-*	-*

              Remark: * No value could be measured as the corresponding pressure was not reached within the timeframe of the test.

 

Since for the 1:1 mixture, by mass, of test item and cellulose in three out of the five measurements the pressure of 2070 kPa could not be reached and two measurements showed a more than 10-fold higher pressure rise time than that of a 1:1 mixture, by mass, of 65 % (w/w) nitric acid and cellulose the test item had no oxidizing properties and no further reference mixtures had to be measured.

Interpretation of results:

GHS criteria not met

Conclusions:

Due to these results the substance does not have to be classified as an “oxidizing liquid”, class 5.1, according to the transport regulations and to GHS (CLP) regulations.

Executive summary:

Huber-Lohr (2021) is a GLP-compliant study following UN Test O2 (liquids). It is reliable without restrictions and can be used as a key study for this endpoint.

The 1:1 mixture, by mass, of test item and cellulose had a pressure rise time higher than that of a 1:1 mixture, by mass, of 65 % (w/w) nitric acid and cellulose. Therefore, the test item had no oxidizing properties and no further reference mixtures had to be measured.

The test item had no oxidizing properties under the test conditions in the sense of the UN Manual of Tests and Criteria, revision 7 (2019) Test O.2.

Due to these results the substance does not have to be classified as an “oxidizing liquid”, class 5.1, according to the transport regulations and to GHS (CLP) regulations.

 

Description of key information

The test item had no oxidizing properties under the test conditions in the sense of the UN Manual of Tests and Criteria, revision 7 (2019) Test O.2.

 

 

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Justification for classification or non-classification

Huber-Lohr (2021) is a GLP-compliant study following UN Test O2 (liquids). It is reliable without restrictions and can be used as a key study for this endpoint.

The test item had no oxidizing properties under the test conditions in the sense of the UN Manual of Tests and Criteria, revision 7 (2019) Test O.2.

Due to these results the substance does not have to be classified as an “oxidizing liquid”, class 5.1, according to the transport regulations and to GHS (CLP) regulations.