Tetrasodium [μ-[3-[[2-amino-5-hydroxy-6-[(2-hydroxy-5-nitro-3-sulphophenyl)azo]-7-sulpho-1-naphthyl]azo]-2-hydroxy-5-sulphobenzoato(8-)]]dichromate(4-)

Oxidising properties

Administrative data

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: According to Regulation (EC) No 440/2008, A.17.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2016

Report date:

2016

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

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

Test material

Test material information

Constituent 1

Reference substance name:

Tetrasodium [μ-[3-[[2-amino-5-hydroxy-6-[(2-hydroxy-5-nitro-3-sulphophenyl)azo]-7-sulpho-1-naphthyl]azo]-2-hydroxy-5-sulphobenzoato(8-)]]dichromate(4-)

EC Number:

276-538-7

EC Name:

Tetrasodium [μ-[3-[[2-amino-5-hydroxy-6-[(2-hydroxy-5-nitro-3-sulphophenyl)azo]-7-sulpho-1-naphthyl]azo]-2-hydroxy-5-sulphobenzoato(8-)]]dichromate(4-)

Cas Number:

72252-58-5

Molecular formula:

C23H8Cr2N6O16S3.4Na

IUPAC Name:

tetrasodium [μ-[3-[[2-amino-5-hydroxy-6-[(2-hydroxy-5-nitro-3-sulphophenyl)azo]-7-sulpho-1-naphthyl]azo]-2-hydroxy-5-sulphobenzoato(8-)]]dichromate(4-)

Study design

Contact with:

powdered cellulose

Duration of test (contact time):

>= 13 - <= 135 s

Results and discussion

Test results (Oxidising solids)

Test results (Oxidising solids) 1

Sample tested:

test mixture (not specified)

Remarks:

migrated information

Parameter:

maximum burning rate

Result:

0.78 other: mm/s (migrated information)

Remarks on result:

other: 10 % test item mixture

Test results (Oxidising solids) 2

Sample tested:

reference mixture (not specified)

Remarks:

migrated information

Parameter:

maximum burning rate

Result:

1.64 other: mm/s (migrated information)

Remarks on result:

other: barium nitrate content 60 %

Any other information on results incl. tables

Grinding, sieving and drying of the test item, barium nitrate and cellulose

The cellulose was dried by treating the sample at 105 °C +/- 5 °C until the weight was constant. Due to the particle size of the cellulose grinding and sieving was not necessary.

The barium nitrate was ground, sieved < 0.12 mm and dried by treating the sample at 105 °C +/- 5°C until the weight was constant.

The test item was ground, sieved < 0.12 mm and dried at 50°C +/- 5°C under vacuum until the weight was constant.

Preliminary test

Three test mixtures with the test item and cellulose 2:1 showed burning with a flame for 5 s, 3 s and 2 s respectively. Afterwards the flames extinguished. The cones did not burnd down completely.

Three test mixtures with barium nitrate/cellulose 2:1 burned down completely in 65 s, 64 s and 64 s, respectively. Due to the results of the preliminary test the main test had to be performed.

Main test

Four tests were performed for the reference mixture (barium nitrate and cellulose) with 50, 55, 60 and 70 wt. % oxidizer (barium nitrate). The results are shown in Table 1:

Table 1

Barium nitrate [ wt. %]	Burning time over 200 mm [s]	Burning rate [mm/s]
50	149	1.34
55	125	1.60
60	122	1.64
70	158	1.27

The highest burning rate of 1.64 mm/s was found for the mixture with 60 wt. % oxidizer.

Applicant's summary and conclusion

Interpretation of results:

other: no oxidising properties

Remarks:

Migrated information

Conclusions:

The mixture of the test item with cellulose showed a lower burning rate than the reference mixture. Therefore, the test item has not to be classified according to Regulation (EC) No 1272/2008.