N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-2-[(4-nitrophenyl)azo]-3-oxobutyramide

Oxidising properties

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

according to regulation (EC) No 440/2008, A.17

Qualifier:

according to guideline

Guideline:

EU Method A.17 (Oxidising Properties (Solids))

Contact with:

powdered cellulose

Duration of test (contact time):

>= 13 - <= 135 s

Sample tested:

test mixture as specified

Remarks:

test item : cellulose = 15 : 85

Parameter:

maximum burning rate

Result:

0.89 mm/s

Remarks on result:

other: highest rate of 6 runs

Sample tested:

reference mixture as specified

Remarks:

barium nitrate : cellulose = 60 : 40

Parameter:

maximum burning rate

Result:

1.27 mm/s

Remarks on result:

other: burned down completely

Preliminary Test

Three test mixtures with the test item and cellulose 2:1 did not burn down completely, the flame extinguished after 13 s, 28 s and 28 s.

Three test mixtures with barium nitrate/cellulose 2:1 burned down completely in 73 s, 68 s and 74 s, respectively.

Due to the results of the preliminary test the full test had to be performed.

Main Test

Three tests were performed for the reference mixture (barium nitrate and cellulose) with 50, 60 and 70 wt. % oxidizer (barium nitrate).

The highest burning rate 1 .27 mm/s was found for the mixture with 60 wt.% oxidizer.

Mixtures of the test item with cellulose were prepared between 10 and 50 wt.% and tested.

Additional tests with 15, 75 and 100 % were performed.

Due to the fact, that the maximum burning rate of the mixtures of the test item with cellulose is lower than the burning rate of the reference mixture, six additional tests for the test item mixture were

performed for the mixtures with the highest burning rates of 2, 5 and 10 wt. % of the test item.

The maximum burning rate of the mixtures of the test item and cellulose (0.89 mm/s) was less than the maximum burning rate of the reference mixture of cellulose and barium nitrate (1.27 mm/s). Due to the fact that the mixture of the test item with cellulose burned slower compared to the reference mixture, or the flame extinguished before the pre-burning phase was finished, it was concluded that the test item has no oxidizing properties.

Interpretation of results:

GHS criteria not met

Remarks:

according to Regulation (EC) no 440/2008, A.17.

Conclusions:

Due to the fact that the mixture of the test item with cellulose burned slower compared to the reference mixture, or the flame extinguished before the pre-burning phase was finished, it was concluded that the test item has no oxidizing properties.

Executive summary:

Oxidising properties of the test item were assessed by EU method A.17. The test item had no oxidizing properties in the sense of the European Commission Regulation (EC) No.440/2008, Method A.17.

Reference 2

Endpoint:

oxidising solids

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Justification for type of information:

Oxidizing properties are associated with the presence of certain functional groups in a molecule having the potential to increase the burning rate or intensity of combustible substances. C.I. Pigment Orange 36 and C.I. Pigment Orange 62 share the same relevant functional group in this context, a nitro group located at the aromatic nucleus indicating oxidizing properties. The chemical structure of both molecules is very similiar.

Thus, read across to C.I. Pigment Orange 36 is well justified.

Reason / purpose for cross-reference:

read-across source

Key result

Sample tested:

test mixture as specified

Remarks:

test item : cellulose = 15 : 85

Parameter:

maximum burning rate

Result:

0.89 mm/s

Remarks on result:

other: highest rate of 6 runs

Key result

Sample tested:

reference mixture as specified

Remarks:

barium nitrate : cellulose = 60 : 40

Parameter:

maximum burning rate

Result:

1.27 mm/s

Remarks on result:

other: burned down completely

Interpretation of results:

GHS criteria not met

Remarks:

according to regulation (EC) no 440/2008, A.17

Conclusions:

due to the fact that the mixture of the test material with cellulose burnd slower compared to the reference mixture, or the flame extinguished before the pre-burning phase was finished. It was concluded that the test item has no oxidizing properties.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

Read-across to A.17 C.I. Pigment Orange 36, structural analogue