Sodium 4-[4-[[2-methyl-4-[[(p-tolyl)sulphonyl]oxy]phenyl]azo]anilino]-3-nitrobenzenesulphonate

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

July from 03rd to 11th, 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

The test item was reduced to a particle size < 0.125 mm by sieving and grinding the remaining fraction.
Before preparing the mixtures the test item was dried at 105 °C, until constant weight was obtained

Contact with:

powdered cellulose

Parameter:

preliminary test

Remarks on result:

not determinable

Remarks:

the substance is non-oxidizing

The cone-shaped pile formed during the Preliminary Test could be ignited, but it went out shortly. The reaction was not vigorous; therefore the Main Test was performed.

In the course of the main test, the flame did not propagate or the mixture could not be ignited. Thus the burning rate could not be determined. Therefore, the test item is not considered to be an oxidizing substance.

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 %	2.07	18.08	-	-	ignited, but the flame went out
20 : 80 %	4.00	16.01	-	-	ignited, but the flame went out
30 : 70 %	6.01	14.02	-	-	ignited, but the flame went out
40 : 60 %	12.03	18.05	-	-	ignited, but the flame went out
50 : 50 %	15.01	15.05	-	-	ignited, but the flame went out
60 : 40 %	18.00	12.07	-	-	no ignition
70 : 30 %	14.06	6.05	-	-	no ignition
80 : 20 %	16.00	4.00	-	-	no ignition
90 : 10 %	18.01	2.00	-	-	no ignition

Reference measurements

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	-	-

Interpretation of results:

other: not classified, according to the CLP Regulation (EC) 1272/2008

Conclusions:

Non oxidising

Executive summary:

The oxidising properties of the substance was carried out according to the EU Method A.17.

In the course of the study burning rate of the test item mixed with a combustible substance could not be determined, because the pile ignited, but the flame did not propagate over 200 mm. Therefore, the substance is not considered to be an oxidizing substance.

Conclusion

Non oxidising

Description of key information

Non oxidising

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

EU Method A.17

Justification for classification or non-classification

According to the CLP Regulation (EC) No 1272/2008, oxidising solid means a solid substance or mixture which, while in itself is not necessarily combustible, may, generally by yielding oxygen, cause, or contribute to, the combustion of other material. An oxidising solid shall be classified in one of the three categories for this class using test O.1 in Part III, sub-section 34.4.1 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria.

In the course of the study burning rate of the test item mixed with a combustible substance could not be determined, because the pile ignited, but the flame did not propagate over 200 mm.

Therefore, the substance is not considered to be an oxidising agent, according to the CLP classification criteria.