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Diss Factsheets

Physical & Chemical properties

Flammability

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Administrative data

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Endpoint:
pyrophoric solids
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance is known to be stable in contact with air at room temperature for prolonged periods of time (days) and hence, the classification procedure does not need to be applied
Endpoint:
substances / mixtures which in contact with water emit flammable gases
Type of information:
experimental study
Adequacy of study:
key study
Study period:
16/06/2010 to 18/06/2010
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
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
Test procedure:
step 3
Max. rate of gas release:
0.12 L/kg h
Remarks on result:
no reaction with water observed
Test procedure:
step 2
Max. rate of gas release:
0.09 L/kg h
Remarks on result:
no reaction with water observed
Test procedure:
step 1
Max. rate of gas release:
0.09 L/kg h
Remarks on result:
no reaction with water observed

Full test results:






























Run



Powder quantity


(g)



Max. rate of gas generation


(L.hr-1.kg-1)



Ignition/No ignition



1



25



0.09



No ignition



2



25



0.09



No ignition



3



25



0.12



No ignition



It was determined that sodium metaborate is not classified as a material of class 4.3. The gas was not tested for flammability.

Interpretation of results:
other: EU GHS criteria not met
Conclusions:
The sample does not show ignition when gas released and in addition the gas evolution is lower than 1 litre per kilogramm of substance and hour.
Executive summary:

Substances/mixtures which in contact with water test was done according to UN Test N.5 under GLP compliance. The sample does not show ignition when gas released and in addition the gas evolution is lower than 1 litre per kilogramm of substance and hour.

Endpoint:
self-heating substances / mixtures
Type of information:
experimental study
Adequacy of study:
key study
Study period:
12/06/2010 to 16/06/2010
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
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
Test procedure:
100 mm sample cube at 140°C
Max. temp. reached:
140
Induction time (h):
24
Result:
negative outcome (no effect observed)
Remarks on result:
other: Appearance before: White crystalline solid. Appearance after: A white honeycomb-like solid remained, which was reduced to approximately half of its initial volume. It was determined that the test substance should be classified as not a self-heating subs

Appearance before test: White crystalline solid.


Appearance after test: A white honeycomb-like solid remained, which was reduced to approximately half of 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:
No positive effect was observed (appearance before test: white crystalline solid,  appearance after test: a white honeycomb-like solid remained, which was reduced to approximately half of its initial volume).
Executive summary:

Self-heating substances/mixtures test was performed according to the UN manual of test and criteria Test N.4 under GLP compliance. No positive effect was observed (appearance before test: white crystalline solid,  appearance after test: a white honeycomb-like solid remained, which was reduced to approximately half of its initial volume). The substance does not need to be classified as self-heating substance.


 

Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
12/06/2010 to 16/06/2010
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
Reason / purpose for cross-reference:
reference to same study
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:
EU Method A.10 (Flammability (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:
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.
Executive summary:

Flammability test was done according to EU method A.10 under GLP compliance. 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.

Description of key information

Flammable solids


Flammability test was done according to EU method A.10 under GLP compliance. 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.


Substances/mixtures which in contact with water emit flammable gaese


Substances/mixtures which in contact with water test was done according to UN Test N.5 under GLP compliance. The sample does not show ignition when gas released and in addition the gas evolution is lower than 1 liter per kilogram of substance and hour.


Self-heating substances/mixtures 


Self-heating substances/mixtures test was performed according to the UN manual of test and criteria Test N.4 under GLP compliance. No positive effect was observed (appearance before test: white crystalline solid,  appearance after test: a white honeycomb-like solid remained, which was reduced to approximately half of its initial volume). The substance does not need to be classified as self-heating substance.


Pyrophoric solids


Study does not need to be conducted because the substance is known to be stable in contact with air at room temperature for prolonged periods of time (days) and hence, the classification procedure does not need to be applied.

Key value for chemical safety assessment

Flammability:
not classified

Additional information

Justification for classification or non-classification

The substance does not need to be classified for each of the flammability endpoints as there is no ignition of the test item and no propagation was observed. Further the test item did not undergo any dangerous self-heating when tested in a 100mm sample cube at 140°C. In addition, no ignition of an evolved gas was observed and also no gas evolution greater than 1 litre per kilogramm substance per hour. The substance is also known to be stable in contact with air at room temperature for prolonged periods of time (days).