Disodium octaborate

Flammability

Link to relevant study record(s)

Reference

Reference 1

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

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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.

Reference 2

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.

Reference 3

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.

Reference 4

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

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.