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Physical & Chemical properties

Flammability

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Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
12 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
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 white paste, boiled then glowed pale 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:
The sample was seen not to ignite, Initially the sample melted to a white paste, boiled then glowed pale red while in contact with the ignition source. No propagation of this reaction was observed.
Executive summary:

The flammability of the test item was assessed during 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 from 1982. The sample was seen not to ignite, Initially the sample melted to a white paste, boiled then glowed pale 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:
16 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
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 on contact with air (not further specified)

It was determined that disodium octaborate tetrahydrate should be classified as not a pyrophoric solid of Class 4.2.

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:
No pryrophoric properties
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 be classified as not a pyrophoric solid.

Endpoint:
self-heating substances / mixtures
Type of information:
experimental study
Adequacy of study:
key study
Study period:
12 JUN 2010 to 16 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
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: No changes observed.

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:
No auto-flammable properties could be observed for the test item.
Executive summary:

The self-heating properties of 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). There could no change in appearance be observed during test. I addition 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:
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
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 result:

Run

Powder quantity

(g)

Max. rate of gas generation

(L.hr-1.kg-1)

Ignition/No ignition

1

25

0.05

No ignition

2

25

0.05

No ignition

3

25

0.10

No ignition

Interpretation of results:
other: EU GHS criteria not met
Conclusions:
slow reaction with water but no spontaneous ignition of the evolved gas
Executive summary:

The flammability of the substance which in contact with water emit 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 flammability of the test item was assessed during 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 from 1982. The sample was seen not to ignite, Initially the sample melted to a white paste, boiled then glowed pale 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 be classified as not a pyrophoric solid.

Flammability, self-heating substances:

The self-heating properties of 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). There could no change in appearance be observed during test. I addition 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 emit 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, 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 test substance could not be ignited with a flame, without propagation.

The main test is unnecessary, because no propagation was observed. The test substance is not a readily combustible solid in the sense of Guideline 92/69/EEC, test A. 10.

Based on the physical state, the structural elements and the melting point the substance has not to be classified as pyrophoric solid and self-heating substance. This is also supported by test data according to the respecitve guidelines.

Based on the testing of flammability in contact with water a slow reaction with water but no spontaneous ignition of the evolved gas was observed and 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.