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Flammability

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Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
14 JUN 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
EU Method A.10 (Flammability (Solids))
Deviations:
not specified
Qualifier:
according to guideline
Guideline:
UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)
Deviations:
not specified
Qualifier:
according to guideline
Guideline:
other: HSE Code of Physico-Chemical Properties 1982.
Deviations:
not specified
GLP compliance:
yes
Test procedure:
burning rate test: preliminary screening test
Remarks on result:
substance does not ignite and propagate combustion either by burning with flame or smouldering along 200 mm of the powder train within the 2 minutes test period

From the preliminary screening test the sample was seen not to ignite and therefore no further testing was required.

Initially the sample melted to a thick, clear gel then partially glowed red while in contact with the ignition source. No propagation of this reaction was observed.

Interpretation of results:
other: EU GHS criteria not met
Conclusions:
It was determined that the sample should not be classified as a highly flammable solid.
Executive summary:

The test item was assessed for its flammability-properties in a GLP study according to EU Method A.10, UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids) and HSE Code of Physico-Chemical properties 1982. The sample did not ignite. Initially the sample melted to a thick, clear gel then partially glowed red while in contact with the ignition source. No propagation of this reaction was observed.

Endpoint:
pyrophoric solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
17 JUN 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
UN Manual of Tests and Criteria: Test N.2 (Test method for pyrophoric solids)
Deviations:
not specified
GLP compliance:
yes
Remarks on result:
no ignition within 5 minutes

Full test results:

Runs

Ignition/No ignition

Observations

1

No ignition

No reaction

2

No ignition

No reaction

3

No ignition

No reaction

4

No ignition

No reaction

5

No ignition

No reaction

6

No ignition

No reaction

Interpretation of results:
other: EU GHS criteria not met
Conclusions:
It has been determined that the test substance was not classified as a pyrophoric solid according to UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria for substances of Class 4, Division 4.2.
Executive summary:

The pyrophoric properties of the test item were assessed in a GLP study according to UN Manual of Tests and Criteria: Test N.2 (Test method for pyrophoric solids) and it was determined that the test item should not be classified as a pyrophoric solid.

Endpoint:
self-heating substances / mixtures
Type of information:
experimental study
Adequacy of study:
key study
Study period:
09 JUN 2010 - 10 JUN 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
UN Manual of Tests and Criteria: Test N.4 (Test method for self-heating substances)
Deviations:
not specified
GLP compliance:
yes
Result:
negative outcome (no effect observed)

Appearance before test: White crystalline solid.

Appearance after test: The sample had hardened to a solid mass with no change in its initial volume.

It was determined that the test substance should be classified as not a self-heating substance of Class 4, Division 4.2.

Interpretation of results:
other: EU GHS criteria not met
Conclusions:
It was determined that the test item should be classified as not a self-heating substance of Class 4, Division 4.2.
Executive summary:

The self-heating properties of the the test item were determined in a GLP study according to UN Manual of Tests and Criteria: Test N.4 (Test method for self-heating substances). It was observed that in appearance the test item changed from white crystalline solid to a hardened solid mass with no change in its initial volume.

No self-ignition took place during testing. The substance should be classified as not self-heating substance.

Endpoint:
substances / mixtures which in contact with water emit flammable gases
Type of information:
experimental study
Adequacy of study:
key study
Study period:
11 JUN 2010 - 07 JUL 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
UN Manual of Tests and Criteria: Test N.5 (Test method for substances which in contact with water emit flammable gases)
Deviations:
not specified
GLP compliance:
yes
Remarks on result:
slow reaction with water but no spontaneous ignition of the evolved gas

Full test results:

Run

Powder quantity

(g)

Max. rate of gas generation

(L.hr-1.kg-1)

Ignition/No ignition

1

25

0.04

No ignition

2

25

0.04

No ignition

3

25

0.04

No ignition

Interpretation of results:
other: EU GHS criteria not met
Conclusions:
It was determined that diboron trioxide is not classified as a material of class 4.3 according to the UN recommendations on the Transportation of Dangerous Goods because no ignition of the very slowly evolved gas is observed.
Executive summary:

The flammability of the substance which in contact with water emits flammable gases was assessed in a GLP study according to UN Manual of Tests and Criteria: Test N.5 (Test method for substances which in contact with water emit flammable gases). A slow reaction with water but no spontaneous ignition of the evolved gas was observed, therefore EU GHS criteria are not met and the test item is not classified as a material of class 4.3 according to the UN recommendations on the Transportation of Dangerous Goods.

Description of key information

Flammability:

The test item was assessed for its flammability-properties in a GLP study according to EU Method A.10, UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids) and HSE Code of Physico-Chemical properties 1982. The sample did not ignite. Initially the sample melted to a thick, clear gel then partially glowed red while in contact with the ignition source. No propagation of this reaction was observed.

Flammability, pyrophoric solids:

The pyrophoric properties of the test item were assessed in a GLP study according to UN Manual of Tests and Criteria: Test N.2 (Test method for pyrophoric solids) and it was determined that the test item should not be classified as a pyrophoric solid.

Flammability, self-heating substances:

The self-heating properties of the the test item were determined in a GLP study according to UN Manual of Tests and Criteria: Test N.4 (Test method for self-heating substances). It was observed that in appearance the test item changed from white crystalline solid to a hardened solid mass with no change in its initial volume.

No self-ignition took place during testing. The substance should be classified as not self-heating substance.

Flammability, contact with water:

The flammability of the substance which in contact with water emits flammable gases was assessed in a GLP study according to UN Manual of Tests and Criteria: Test N.5 (Test method for substances which in contact with water emit flammable gases). A slow reaction with water but no spontaneous ignition of the evolved gas was observed, therefore EU GHS criteria are not met and the test item is not classified as a material of class 4.3 according to the UN recommendations on the Transportation of Dangerous Goods.

Key value for chemical safety assessment

Flammability:
not classified

Additional information

Justification for classification or non-classification

The substance was tested according to "Recommendations on the TRANSPORT OF DANGEROUS GOODS - Manual of Tests and Criteria - Part III. None of the classifiation criteria was met, therefore there is no need to classify the substance, neither as flammable, nor as pyrophoric, self-heating or as substance which in contact with water emits flammable gases.