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Physical & Chemical properties

Flammability

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Reference
Endpoint:
flammable solids
Type of information:
read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Justification for type of information:
Flammability is the ability of a substance to burn or ignite, causing fire or combustion. The degree of flammability depends largely upon the chemical composition of the material. The chemical composition of lithium tetrahydroxyborate is similar to dilithium tetraborate consisting of the same elements/functional groups. Any variations due to the range of trigonal and tetrahedral species between the substances are not expected to lead to any changes in the flammability potential of these substances. Read-across to the flammability result on dilithium tetraborate is therefore proposed.
Key result
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
Interpretation of results:
GHS criteria not met
Conclusions:
Lithium tetrahydroxyborate can be considered as non-flammable.
Executive summary:

Following the UN method Test N.1, a preliminary screening test was conducted initially for dilithium tetraborate. During the preliminary screening, the test item melted to form small, spherical particles. No ignition or propagation was observed. It was concluded that no further testing is required.  Dilithium tetraborate can be considered as non-flammable.  

Flammability is the ability of a substance to burn or ignite, causing fire or combustion.  The degree of flammability depends largely upon the chemical composition of the material.  The chemical composition of lithium tetrahydroxyborate is similar to dilithium tetraborate consisting of the same elements/functional groups.  Any variations due to the range of trigonal and tetrahedral species between the substances are not expected to lead to any changes in the flammability potential of these substances. It can therefore be concluded that lithium tetrahydroxyborate is not flammable.

Description of key information

During a preliminary screening on dilithium tetraborate, the test item melted to form small, spherical particles. No ignition or propagation was observed.  Dilithium tetraborate can be considered as non-flammable.

Flammability is the ability of a substance to burn or ignite, causing fire or combustion.  The degree of flammability depends largely upon the chemical composition of the material.  The chemical composition of lithium tetrahydroxyborate is identical to dilithium tetraborate consisting of the same elements/functional groups.  Any variations due to the range of trigonal and tetrahedral species between the substances are not expected to lead to any changes in the flammability potential of these substances. It can therefore be concluded that lithium tetrahydroxyborate is not flammable.

Key value for chemical safety assessment

Flammability:
not classified

Additional information

Justification for classification or non-classification

A preliminary screening test on dilithium tetraborate was conducted which showed no ignition or propagation was observed. It was concluded that no further testing was required.  Dilithium tetraborate was considered as non-flammable and therefore does not meet the criteria for physico-chemical classification. As the flammability result is not close to a classification boundary for the physico-chemical hazards, any variations due to the range of trigonal and tetrahedral species between the substances are not expected to lead to any changes in the classification and labelling of the category. It is therefore expected that all lithium borate substances listed in this category including lithium tetrahydroxyborate will not meet the criteria for physico-chemical classification.