O-(ethoxycarbonyl)-N-(1-methyl-2-oxo-2-phenylethylidene)hydroxylamine

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

02 June 2017 to 14 June 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same 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:

other: All mixtures (Confirmatory test)

Parameter:

burning rate

Remarks on result:

other: In this confirmatory test, observed burning of the mixtures is due to combustion of the test material and not due to the oxidising properties of the test material. The result of the main test has been shown to be false-positive.

Preliminary Test

The pile ignited and burnt with an orange flame emitting grey fumes and a small amount of sooty particulates. The entire pile was burnt before the flame self-extinguished.

 

Main Test

The results of the main test are detailed in the following tables:

 

Table 1: Reference Mixtures

% Barium Nitrate	Observations	Burning Time (s)	Burning Rate (mm/s)
10	The pile burnt with an orange/yellow/green flame emitting yellow sparks and grey fumes.	265	0.75
20	The pile burnt with an orange/yellow/green flame emitting yellow sparks and grey fumes.	220	0.91
30	The pile burnt with an orange/yellow/green flame emitting yellow sparks and grey fumes.	198	1.01
40	The pile burnt with an orange/yellow/green flame emitting yellow sparks and grey fumes.	226	0.88
50	The pile burnt with an orange/yellow/green flame emitting yellow sparks and grey fumes.	188	1.06
60	The pile burnt with an orange/yellow/green flame emitting yellow sparks and grey fumes.	149	1.34
70	The pile burnt with an orange/yellow/green flame emitting yellow sparks and grey fumes.	212	0.94
80	The pile burnt with an orange/yellow/green flame emitting yellow sparks and grey fumes, but self-extinguished after propagating combustion over 60 mm.	-	-
90	The pile failed to ignite.	-	-

Maximum burning rate:1.34mm/s

Table 2: Sample Mixtures

% Test Material	Observations	Burning Time (s)	Burning Rate (mm/s)
10	The pile burnt with an orange/blue flame which emitted grey fumes.	185	1.08
20	The pile burnt with an orange/blue flame which emitted grey fumes.	128	1.56
30	The pile burnt with an orange/blue flame which emitted grey fumes.	98	2.04
40	The pile burnt with an orange/blue flame which emitted grey fumes.	72	2.78
50	The pile burnt with an orange/blue flame which emitted grey fumes.	51	3.92
60	The pile burnt with a large yellow/orange flame which emitted black fumes.	41	4.88
70	The pile burnt with a large yellow/orange flame which emitted black fumes.	41	4.88
80	The pile burnt with a large yellow/orange flame which emitted black fumes.	111	1.80
90	The pile melted and burnt with an orange/yellow flame which emitted black fumes.	443	0.45

Maximum burning rate: 4.88 mm/s
Maximum burning rate of reference mixtures: 1.34 mm/s

Confirmatory Test:

The results of the confirmatory test are detailed in the following table:

 

Table 3: Test material: Celite Mixtures

% Test Material	Observations	Burning Time (s)	Burning Rate (mm/s)
10	The pile failed to ignite.	-	-
20	The pile failed to ignite.	-	-
30	The pile ignited and burnt with a yellow flame which emitted black fumes but self-extinguished without propagating combustion.	-	-
40	The pile burnt with a yellow/orange flame which emitted black fumes.	79	2.53
50	The pile burnt with a yellow/orange flame which emitted black fumes.	42	4.76
60	The pile burnt with a yellow/orange flame which emitted black fumes.	40	5.00
70	The pile burnt with a yellow/orange flame which emitted black fumes.	42	4.76
80	The pile burnt with a yellow/orange flame which emitted black fumes.	70	2.86
90	The pile melted but failed to ignite.	-	-

 

Discussion

The positive result obtained in the main test was subjected to a confirmatory test by repeating the test using celite in place of cellulose. Celite (diatomaceous earth, also known as kieselguhr) is inert to oxidation. In this confirmatory test, observed burning of the mixtures is due to combustion of the testmaterialand not due to the oxidising properties of the test material.

The result of the main test has been shown to be false-positive. Therefore the test material has been classified as non-oxidising, since in the confirmatory test the test material:celite mixtures yielded burning rates to negate the results of the main test.

Interpretation of results:

other: Not classified according to 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 a study conducted in accordance with the standardised guideline EU Method A.17 under GLP conditions.

In the preliminary test the pile ignited and burnt with an orange flame emitting grey fumes and a small amount of sooty particulates. The entire pile was burnt before the flame self-extinguished.

In the main test the maximum burning rate was shown to be 4.88 mm/s and the maximum burning rate of reference mixtures was 1.34 mm/s. The positive result obtained in the main test was subjected to a confirmatory test by repeating the test using celite in place of cellulose. Celite (diatomaceous earth, also known as kieselguhr) is inert to oxidation. In this confirmatory test, observed burning of the mixtures is due to combustion of the test material and not due to the oxidising properties of the test material. The result of the main test has been shown to be false-positive. Therefore the test material has been classified as non-oxidising, since in the confirmatory test the test material: celite mixtures yielded burning rates to negate the results of the main test.

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 a study conducted in accordance with the standardised guideline EU Method A.17 under GLP conditions.

In the preliminary test the pile ignited and burnt with an orange flame emitting grey fumes and a small amount of sooty particulates. The entire pile was burnt before the flame self-extinguished.

In the main test the maximum burning rate was shown to be 4.88 mm/s and the maximum burning rate of reference mixtures was 1.34 mm/s. The positive result obtained in the main test was subjected to a confirmatory test by repeating the test using celite in place of cellulose. Celite (diatomaceous earth, also known as kieselguhr) is inert to oxidation. In this confirmatory test, observed burning of the mixtures is due to combustion of the test material and not due to the oxidising properties of the test material. The result of the main test has been shown to be false-positive. Therefore the test material has been classified as non-oxidising, since in the confirmatory test the test material: celite mixtures yielded burning rates to negate the results of the main test.

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.