Reaction mass of hydrogen [1-[(2-hydroxy-4-nitrophenyl)azo]-2-naphtholato(2-)][1-[(2-hydroxy-5-nitrophenyl)azo]-2-naphtholato(2-)]chromate(1-) , compound with 3-[(2-ethylhexyl)oxy]propylamine (1:1) and hydrogen bis[1-[(2-hydroxy-4-nitrophenyl)azo]-2-naphtholato(2-)]chromate(1-) , compound with 3-[(2-ethylhexyl)oxy]propylamine (1:1) and hydrogen bis[1-[(2-hydroxy-5-nitrophenyl)azo]-2-naphtholato(2-)]chromate(1-) , compound with 3-[(2-ethylhexyl)oxy]propylamine (1:1)

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

13 July 2017 to 21 July 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))

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Contact with:

powdered cellulose

Key result

Sample tested:

test mixture as specified

Remarks:

2:1 sample-to-cellulose ratio

Parameter:

preliminary test

Remarks on result:

slow smouldering

Key result

Sample tested:

reference mixture as specified

Remarks:

2:1 reference-to-cellulose ratio

Parameter:

preliminary test

Result:

54 s

Remarks on result:

sparking

Remarks:

yellow/green flame with sparks

Table 1: Drying of the Samples at 105 °C

Sample	Drying time (h)	Tray No.	Tray Weight (g)	Tray & wet 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 (%)
Test material	25	1	473.8	487.6	487.3	13.8	13.5	0.3	2.2
Cellulose	25	2	471.8	504.8	503.1	33.0	31.3	1.7	5.2
Reference material	4	3	473.9	511.5	511.0	37.6	37.1	0.5	1.3

 

Table 2: Preliminary Screening Test

Composition of 2:1 Ratio	Mass of material (g)	Type of reaction	Burning time (sec)	Comments on burning behaviour
Reference material	4	Vigorous	54	Yellow/green flame with sparks
Cellulose	2
Test material	2	Moderate	636	The sample smouldered with sparks and grey smoke. On completion of testing the sample changed from black to green and had expanded by approximately 3 times its initial volume
Cellulose	1

The ignition source was a butane micro torch

Interpretation of results:

other: Not classified in accordance with EU Criteria

Conclusions:

Under the conditions of this study the reaction of the test material and cellulose mixture was significantly slower than the reference mixture. It is clear, therefore, that the test material is not an oxidising solid.

Executive summary:

The oxidising properties of the test material were investigated in accordance with the standardised guideline EU Method A17, under GLP conditions.

The test material, powdered cellulose and the reference material (barium nitrate) were dried at 105 °C until constant weight was obtained. For the preliminary test the dried test material was thoroughly mixed with cellulose in the proportions, 2 of test material to 1 of cellulose, by weight and the mixture was formed, without tamping, into a small cone-shaped pile of dimensions 3.5 cm (diameter of base) x 2.5 cm (height). The pile was placed on a cool, non-combustible, non-porous and low heat-conducting base plate. The ignition source, a hot flame from a gas burner, was put in contact with the cone. The vigour and duration of the resultant reaction were observed and recorded.

The test material and cellulose mixture smouldered with sparks and grey smoke (636 seconds). On completion of testing the sample changed from black to green and had expanded by approximately 3 times its initial volume. The reference mixture burned vigorously with a yellow/green flame and sparks (54 seconds).

Under the conditions of this study the reaction of the test material and cellulose mixture was significantly slower than the reference mixture. It is clear, therefore, that the test material is not an oxidising solid.

Description of key information

Under the conditions of this study the reaction of the test material and cellulose mixture was significantly slower than the reference mixture. It is clear, therefore, that the test material is not an oxidising solid.

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 A17, under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

The test material, powdered cellulose and the reference material (barium nitrate) were dried at 105 °C until constant weight was obtained. For the preliminary test the dried test material was thoroughly mixed with cellulose in the proportions, 2 of test material to 1 of cellulose, by weight and the mixture was formed, without tamping, into a small cone-shaped pile of dimensions 3.5 cm (diameter of base) x 2.5 cm (height). The pile was placed on a cool, non-combustible, non-porous and low heat-conducting base plate. The ignition source, a hot flame from a gas burner, was put in contact with the cone. The vigour and duration of the resultant reaction were observed and recorded.

The test material and cellulose mixture smouldered with sparks and grey smoke (636 seconds). On completion of testing the sample changed from black to green and had expanded by approximately 3 times its initial volume. The reference mixture burned vigorously with a yellow/green flame and sparks (54 seconds).

Under the conditions of this study the reaction of the test material and cellulose mixture was significantly slower than the reference mixture. It is clear, therefore, that the test material is not an oxidising solid.

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.