Reaction product of 4-aminophenol with 2-ethyl-6-methylbenzenamine and sodium polysulfide

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

30 June - 27 September, 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))

Version / remarks:

31 May 2008

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

Expiry date 28 July 2020

Contact with:

other: Oxidiser cellulose-mixtures containing 10 to 90 % weight of oxidiser in 10 % increments were prepared. Based on sponsor’s suspicion that the result is a false positive the test was repeated using kieselguhr in place of cellulose.

Key result

Sample tested:

other: Oxidiser cellulose-mixtures containing 10 to 90 % weight of oxidiser in 10 % increments were prepared.

Remarks:

burning time: 326sec

Parameter:

burning time of reaction over a distance of 200 mm

Result:

0.613 mm/s

Remarks on result:

other: The test was repeated with kieselguhr in place of cellulose. These mixtures could not be ignited.

Reference measurement

Ratio Ba(NO3)2: Cellulose	Weight Ba(NO3)2(g)	Weight Cellulose (g)	Burning time (sec)	Burning rate (mm/sec)
10 : 90 %	2.00	18.01	469	0.426
20 : 80 %	4.02	16.01	406	0.493
30 : 70 %	6.04	14.02	395	0.506
40 : 60 %	12.00	18.01	439	0.456
50 : 50 %	15.02	15.00	503	0.398
60 : 40 %	18.01	12.01	563	0.355
70 : 30 %	21.01	9.00	638	0.313
80 : 20 %	40.00	10.02	-	-
90 : 10 %	45.00	5.03	-	-

 

  Main Test

Ratio Test item : Cellulose	Weight Test item (g)	Weight Cellulose (g)	Burning time (sec)	Burning rate (mm/sec)	Type of burning
10 : 90 %	2.02	18.01	326	0.613	ignited, burnt with flame
20 : 80 %	4.01	16.02	-	-	ignited, did not propagate over 200 mm

 

 Trials with test item –kieselguhrmixtures

Ratio Test item : Kieselguhr	Weight Test item (g)	Weight Kieselguhr(g)	Burning time (sec)	Burning rate (mm/sec)	Type of burning
10 : 90 %	2.02	18.04	-	-	no ignition
20 : 80 %	4.01	16.01	-	-	no ignition
30 : 70 %	6.02	14.00	-	-	no ignition
40 : 60 %	12.02	18.02	-	-	no ignition
50 : 50 %	15.01	15.01	-	-	no ignition
60 : 40 %	18.00	12.00	-	-	no ignition
70 : 30 %	14.00	6.00	-	-	no ignition
80 : 20 %	16.04	4.01	-	-	no ignition
90 : 10 %	18.01	2.01	-	-	no ignition

 

Interpretation of results:

GHS criteria not met

Conclusions:

The cone-shaped pile formed during the Preliminary Test was ignited, but the flame went out. The reaction was not vigorous; therefore the Main Test was performed. The highest value of burning rate of a given mixture is relevant for evaluation.
In the course of the Main Test burning rate of the mixture containing 10% test item was higher than the highest burning rate of the reference mixture. The substance should be considered as oxidizing under these testing conditions. Based on the manufacturing process and chemical structure of the substance, this result was however deemed as a false positive.

As stated in method A.17 of EC Regulation 40/2008, section 1.6.2.2 the test was repeated with kieselguhr in place of cellulose. These mixtures could not be ignited. Then it is concluded that the test item Blue Sema is not considered as an oxidizing substance

Executive summary:

The purpose of this study was to investigate the oxidising properties of the test item.

No further testing is required when the preliminary test clearly indicates that the substance has oxidising properties. When this is not the case, the substance is subjected to the full test.

In the main test, the substance to be tested and a defined combustible substance are mixed in various ratios. Each mixture is then formed into a pile and the pile ignited at one end. The maximum burning rate determined is compared with the maximum burning rate of the reference mixture.

Burning rate of the test mixture containing 10% Blue Sema was found to be higher than the maximum burning rate of the reference mixture.

As the result was suspected of being a false positive, the test was repeated using kieselguhr in place of cellulose. These mixtures could not be ignited.

 

Description of key information

The purpose of this study was to investigate the oxidizing properties of the test item. In the course of the Main Test burning rate of the mixture containing 10% test item was higher than the highest burning rate of the reference mixture. This result was however deemed as a false positive.

As stated in method A.17 of EC Regulation 40/2008, section 1.6.2.2 the test was repeated with kieselguhr in place of cellulose. These mixtures could not be ignited. Then it is concluded that the test item Blue Sema  is not considered as an oxidizing substance

Key value for chemical safety assessment

Oxidising properties:

non oxidising