Registration Dossier

Administrative data

Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010-06-02 to 2010-06-23
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Recent, well documented GLP and guideline study.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report Date:
2010

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method A.17 (Oxidising Properties (Solids))
Deviations:
no
GLP compliance:
yes (incl. certificate)

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Test results (Oxidising solids)open allclose all
Sample tested:
test mixture (not specified)
Remarks:
migrated information
Parameter:
maximum burning rate
Result:
2.22 other: mm/s (migrated information)
Remarks on result:
other: Test material / cellulose mixture - Result is considered to be false positive
Sample tested:
test mixture (not specified)
Remarks:
migrated information
Parameter:
maximum burning rate
Result:
3.45 other: mm/s (migrated information)
Remarks on result:
other: Test material / kieselgur mixture
Sample tested:
reference mixture (not specified)
Remarks:
migrated information
Parameter:
maximum burning rate
Result:
1.6 other: mm/s (migrated information)
Remarks on result:
other: Barium nitrate / cellulose mixture

Any other information on results incl. tables

RESULTS OFTHEPRELIMINARY TEST

The mixture burned down slowly with yellow flame. The reaction was not vigorous, therefore it was necessary to complete the full train test.

RESULTS

OXIDIZER/CELLULOSE MIXTURE

Oxidizer / Cellulose mixtures containing 10% to 90 % weight of oxidizer in 10%increments were prepared. As oxidizer the reference material barium nitrate (analyticalgrade) was used. The mixtures with cellulose used and the corresponding measuredburning rates are shown in the following tables. Results for reference mixtures:

Ba(NO3)2/
Cellulose % w/w

Burning time
[s]

Burning distance
[mm]

burning rate
[mm/s]

10/90

206

200

0.97

20/80

173

200

1.16

30/70

158

200

1.27

40/60

149

200

1.34

50/50

142

200

1.41

60/40

125

200

1.60

70/30

134

200

1.49

80/20

228

200

0.87

90/10

no ignition

-

-

 

Result:

The reference mixture with the maximum burning rate was the 60/40 mixture bariumnitrate to cellulose.

maximum burning rate1.60 mm/s

TEST MATERIAL/CELLULOSE MIXTURE

Test item / Cellulose mixtures containing 10% to 90 % weight of test item in 10%increments were prepared and tested. The mixtures with cellulose used and the burningrates are shown in the following table.

Test
item/cellulose
[%] w/w

Burning
time [s]

Burning
distance [mm]

burning
rate
[mm/s]

10/90

172

200

1.16

20/80

165

200

1.21

30/70

158

200

1.27

40/60

112

200

1.79

50/50

110

200

1.82

60/40

90

200

2.22

70/30

102

200

1.96

80/20

145

200

1.38

90/10

555

200

0.38

 

The mixture with the maximum burning rate was the 60/40 mixture test item to cellulose.

maximum burning rate        2.22 mm/s

This maximum burning rate was significantly higher than that of the reference mixture. Because it was assumed that this result was false positive, the test had to be repeatedwith test item / kieselgur mixtures.

TEST ITEM/KIESELGUR MIXTURES

The mixtures with kieselgur used and the burning rates are shown in the following table.

Test item /
kieselgur
[% w/w]

Burning
time [s]

Burning
distance [mm]

burning
rate
[mm/s]

10/90

no ignition

-

-

20/80

no ignition

-

-

30/70

no ignition

-

-

40/60

no ignition

-

-

50/50

no ignition

-

-

60/40

97

200

2.06

70/30

58

200

3.45

80/20

62

200

3.23

90/10

187

200

1.07

 

The mixture with the maximum burning rate was the 70/30 mixture test item to kieselgur.

maximum burning rate:         3.45 mm/s

The maximum burning rate of the mixture test item/kieselgur was also higher than thatfrom the reference mixture and even higher than that of the test item/cellulose mixture.


Applicant's summary and conclusion

Interpretation of results:
other: no oxidising properties
Remarks:
Migrated information
Conclusions:
The test item 1-Chloro-2,5-dimethoxy-4-nitrobenzene is NOT classified as an oxidizing substance according to ECCouncil Regulation (EC) No 440/2008, Annex, Part A, A.17
Executive summary:

SUMMARY

The oxidizing properties of the test item 1-Chloro-2,5-dimethoxy-4-nitrobenzene weredetermined according to European Commission Council Regulation (EC) No 440/2008,Annex, Part A, A.17.

For this examination the test item, the cellulose material, the kieselgur and the referencematerial were reduced to a particle size < 0.125 mm by sieving. Before preparing the mixtures, the cellulose material, the kieselgur and the reference material were dried at105°C until constant weight was obtained.

As reference barium nitrate (oxidizer) and cellulose (combustible substance) were mixedin various ratios from 10% to 90% in 10% increments. Also the test item and cellulose(combustible substance) were mixed in various ratios from 10% to 90% in 10%increments. A pile was formed of each mixture and then it was tried to ignite the pile atone end. The maximum burning rate of the reference mixture determined was compared with the maximum burning rate of the test item/cellulose mixture.

The maximum burning rate of test item/cellulose mixture was significantly higher thanthat of the reference mixture.

Finally the test item and kieselgur1(as inert material) were mixed in various ratios from10% to 90% in 10% increments. A pile was formed of each mixture and then it was tried to ignite the pile at one end. The maximum burning rate determined was compared withthe maximum burning rate of the reference mixture.

Summing up it can be said, that the maximum burning rate of the mixture testitem/kieselgur was also higher than that of the reference mixture and even higher thanthat of the test item/cellulose mixture.

Therefore the result of the mixture test item/cellulose was clearly false positive!

The test item 1-Chloro-2,5-dimethoxy-4-nitrobenzene
is NOT classified as an oxidizing substance
according to
EC Council Regulation (EC) No 440/2008, Annex, Part A, A.17