N-(2-chloroethyl)-4-[(2,6-dichloro-4-nitrophenyl)azo]-N-ethyl-m-toluidine

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Justification for type of information:

The result of the standard test has been shown to be false-positive and the test material classified as non-oxidizing, since in the confirmatory test, four test material/celite mixtures yielded burning rates to negate the results of the original test. In conclusion Disperse Blue 360 has been determined not to have oxidizing properties.
When adapting a read across approach it can be reasoned that Disperse Brown 27 would also not exhibit oxidizing behaviour

Reason / purpose for cross-reference:

read-across source

Qualifier:

according to guideline

Guideline:

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

GLP compliance:

yes

Contact with:

powdered cellulose

Duration of test (contact time):

> 0 - <= 214 s

Key result

Sample tested:

test mixture as specified

Remarks:

2:1

Parameter:

preliminary test

Result:

<= 56 s

Remarks on result:

slow smouldering

Key result

Sample tested:

test mixture as specified

Remarks:

70:30

Parameter:

burning time of reaction over a distance of 200 mm

Result:

>= 2.247 - <= 2.381 mm/s

Remarks on result:

result suspected of being a false positive

Key result

Sample tested:

test mixture as specified

Remarks:

80:20

Parameter:

burning time of reaction over a distance of 200 mm

Result:

>= 2.151 - <= 2.353 mm/s

Remarks on result:

result suspected of being a false positive

Key result

Sample tested:

test mixture as specified

Remarks:

90:10

Parameter:

burning time of reaction over a distance of 200 mm

Result:

>= 2.198 - <= 2.353 mm/s

Remarks on result:

result suspected of being a false positive

Key result

Sample tested:

test mixture as specified

Remarks:

50:50, test material:celite

Parameter:

burning time of reaction over a distance of 200 mm

Result:

ca. 1.429 mm/s

Remarks on result:

slow smouldering

Key result

Sample tested:

test mixture as specified

Remarks:

60:40, test material:celite

Parameter:

burning time of reaction over a distance of 200 mm

Result:

ca. 2.899 mm/s

Remarks on result:

slow smouldering

Key result

Sample tested:

test mixture as specified

Remarks:

70:30, test material:celite

Parameter:

burning time of reaction over a distance of 200 mm

Result:

ca. 3.448 mm/s

Remarks on result:

slow smouldering

Key result

Sample tested:

test mixture as specified

Remarks:

80:20, test material:celite

Parameter:

burning time of reaction over a distance of 200 mm

Result:

ca. 3.125 mm/s

Remarks on result:

slow smouldering

Key result

Sample tested:

test mixture as specified

Remarks:

90:10, test material:celite

Parameter:

burning time of reaction over a distance of 200 mm

Result:

ca. 2.74 mm/s

Remarks on result:

slow smouldering

Using the criteria given in Method A17 of Commission Directive9 2l69/EEC the result obtained from the standard test determined the test material to have oxidising properties.

The positive result obtained in the standard test was subjected to confirmatory testing by repeating the test using celite in place of cellulose. Celite (diatomaceous earth, also known as kieseiguhr) is inert to oxidation. In this confirmatory test, observed burning of the mixtures is due to combustion of the test material and not due to oxidizing properties.

 

The result of the standard test has been shown to be false-positive and the test material classified as non-oxidizing, since in the confirmatory test, four test material/celite mixtures yielded burning rates to negate the results of the original test.

 

In conclusion Disperse Blue 360 has been determined not to have oxidizing properties.

Interpretation of results:

GHS criteria not met

Conclusions:

Using the criteria given in Method A17 of Commission Directive9 2l69/EEC the result obtained from the standard test determined the test material to have oxidising properties.
The positive result obtained in the standard test was subjected to confirmatory testing by repeating the test using celite in place of cellulose. Celite (diatomaceous earth, also known as kieseiguhr) is inert to oxidation. In this confirmatory test, observed burning of the mixtures is due to combustion of the test material and not due to oxidizing properties.

The result of the standard test has been shown to be false-positive and the test material classified as non-oxidizing, since in the confirmatory test, four test material/celite mixtures yielded burning rates to negate the results of the original test.

In conclusion Disperse Blue 360 has been determined not to have oxidizing properties.

Executive summary:

Using the criteria given in Method A17 of Commission Directive9 2l69/EEC the result obtained from the standard test determined the test material to have oxidising properties. The positive result obtained in the standard test was subjected to confirmatory testing by repeating the test using celite in place of cellulose. Celite (diatomaceous earth, also known as kieseiguhr) is inert to oxidation. In this confirmatory test, observed burning of the mixtures is due to combustion of the test material and not due to oxidizing properties.

 

The result of the standard test has been shown to be false-positive and the test material classified as non-oxidizing, since in the confirmatory test, four test material/celite mixtures yielded burning rates to negate the results of the original test.

 

In conclusion Disperse Blue 360 has been determined not to have oxidizing properties.

Description of key information

With the OB value of Disperse Brown 27 being approximately equal to other compounds which are not classed as oxidising agents it was reasoned that Disperse Brown 27 would not exhibit any significant oxidising behaviour/potential.

Using the criteria given in Method A17 of Commission Directive9 2l69/EEC the result obtained from the standard test determined the test material to have oxidising properties. The positive result obtained in the standard test was subjected to confirmatory testing by repeating the test using celite in place of cellulose. Celite (diatomaceous earth, also known as kieseiguhr) is inert to oxidation. In this confirmatory test, observed burning of the mixtures is due to combustion of the test material and not due to oxidizing properties.

In conclusion, the read across evidence in conjunction with the OB values suggested Disperse Brown 27 would not exhibit any oxidising potential.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

With the OB value of Disperse Brown 27 being approximately equal to other compounds which are not classed as oxidising agents it was reasoned that Disperse Brown 27 would not exhibit any significant oxidising behaviour/potential.

Using the criteria given in Method A17 of Commission Directive9 2l69/EEC the result obtained from the standard test determined the test material to have oxidising properties. The positive result obtained in the standard test was subjected to confirmatory testing by repeating the test using celite in place of cellulose. Celite (diatomaceous earth, also known as kieseiguhr) is inert to oxidation. In this confirmatory test, observed burning of the mixtures is due to combustion of the test material and not due to oxidizing properties.

In conclusion, the read across evidence in conjunction with the OB values suggested Disperse Brown 27 would not exhibit any oxidising potential.

Justification for classification or non-classification

With the OB value of Disperse Brown 27 being approximately equal to other compounds which are not classed as oxidising agents it was reasoned that Disperse Brown 27 would not exhibit any significant oxidising behaviour/potential.

Using the criteria given in Method A17 of Commission Directive9 2l69/EEC the result obtained from the standard test determined the test material to have oxidising properties. The positive result obtained in the standard test was subjected to confirmatory testing by repeating the test using celite in place of cellulose. Celite (diatomaceous earth, also known as kieseiguhr) is inert to oxidation. In this confirmatory test, observed burning of the mixtures is due to combustion of the test material and not due to oxidizing properties.

In conclusion, the read across evidence in conjunction with the OB values suggested Disperse Brown 27 would not exhibit any oxidising potential.