Disodium 3(or 5)-[[4-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-1-naphthyl]azo]salicylate

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2015

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:

yes

Remarks:

Based on earlier studies the test substance was not dried. The reason is that the test substance contents high hydrophilic sulfonate salts that rapidly bind air humidity. This deviation have no negative impact on the study results.

GLP compliance:

yes (incl. QA statement)

Contact with:

powdered cellulose

Duration of test (contact time):

300 s

Key result

Sample tested:

test mixture as specified

Remarks:

20 % w/w sample with cellulose

Parameter:

maximum burning rate

Result:

0.097 mm/s

Sample tested:

reference mixture as specified

Remarks:

10 % w/w barium nitrate with cellulose

Parameter:

maximum burning rate

Result:

0.813 mm/s

Table No. 1: Burning rate results

Test Substance (% w/w)	Burning time (s)	Burning Rate (mm/s)	Note
10	300	0.053	Smouldering, without flame
20	300	0.097	Smouldering, without flame
30	300	0.083	Smouldering, without flame
40	300	0.050	Smouldering, without flame
50	300	0.067	Smouldering, without flame
60	300	0.047	Smouldering, without flame
70	300	0.047	Smouldering, without flame
80	300	-	Without flame
90	300	-	Without flame
Reference substance
Ba(NO3)2 (% w/w)	Burning time (s)	Burning Rate (mm/s)	Note
10	246	0.813	-
20	279	0.717	-
30	257	0.778	-
40	297	0.673	-
50	309	0.647	-
60	355	0.563	-
70	415	0.482	-
80	-	-	Without flame
90	-	-	Without flame

Interpretation of results:

GHS criteria not met

Conclusions:

On basis of the result obtained from trial test, it is obvious that the maximum burning rate of the tested mixture is lower than maximum burning rate of the reference mixture of cellulose and barium nitrate. Thus test substance, Direct Black 51, should not be considered as a substance with oxidizing properties.

Executive summary:

The procedure was performed according to the Method A.17 Oxidizing properties (Solids), Council Regulation (EC) No.440/2008, published in O.J. L 142, 2008.

On basis of the result obtained from trial test, it is obvious that the maximum burning rate of the tested mixture is lower than maximum burning rate of the reference mixture of cellulose and barium nitrate. Thus test substance, Direct Black 51, should not be considered as a substance with oxidizing properties.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Justification for classification or non-classification

On basis of the result obtained from trial test, it is obvious that the maximum burning rate of the tested mixture is lower than maximum burning rate of the reference mixture of cellulose and barium nitrate. Thus test substance, Direct Black 51, should not be considered as a substance with oxidizing properties.