Reaction products of boric acid and calcium dihydroxide and lithium hydroxide

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Justification for type of information:

A theoretical assessment was performed on dilithium tetraborate and on calcium metaborate and concluded that the substances contained no functional groups imparting oxidising properties. Reaction products of boric acid and calcium dihydroxide and lithium hydroxide contains the same functional groups as these source substances and any variations due to the range of trigonal and tetrahedral species between the substances are not expected to lead to any changes in the oxidising potential of these substances.
The target UVCB substance has a higher precursor molar ratio for lithium hydroxide than for calcium hydroxide, and therefore the precautionary principle should be applied and read across from dilithium tetraborate where relevant to consider the worst case. Read-across to the theoretical statement on dilithium tetraborate is therefore proposed.

Reason / purpose for cross-reference:

read-across source

Reason / purpose for cross-reference:

read-across source

Key result

Parameter:

other: theoretical assessment

Remarks on result:

other: Theoretical assessment

Remarks:

No groups identified associated with oxidising properties.

Interpretation of results:

GHS criteria not met

Conclusions:

On the basis of theoretical assessment, the material should be considered as not oxidising and should not be subjected to experimental testing. The material meets all criteria for exemption from testing and has a structure not at all conducive with that required to exhibit oxidising tendencies.

Executive summary:

Test A17/ A21 need not be carried out when examination of the structural formula establishes beyond reasonable doubt that the substance has no oxidising properties. The supplement to A17/A21 method describes situations in which experimental assessment of oxidising properties is not necessary. A theoretical assessment was therefore carried out initially on dilithium tetraborate and on calcium metaborate.

 On the basis of theoretical assessment, Reaction products of boric acid and calcium dihydroxide and lithium hydroxide which  contains the same functional groups as these source substances should also be considered as not oxidising and should not be subjected to experimental testing. The material meets all criteria for exemption from testing and has a structure not at all conducive with that required to exhibit oxidising tendencies.

Description of key information

On the basis of theoretical assessment, Reaction products of boric acid and calcium dihydroxide and lithium hydroxide should be considered as not oxidising and should not be subjected to experimental testing. The material meets all criteria for exemption from testing and has a structure not at all conducive with that required to exhibit oxidising tendencies.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Justification for classification or non-classification

A theoretical assessment was performed on dilithium tetraborate and on calcium metaborate and concluded that the materials meets all criteria for exemption from testing and has a structure not at all conducive with that required to exhibit oxidising tendencies. As the same functional groups are present across the category members, and any variations due to the range of trigonal and tetrahedral species between the substances are not expected to lead to any changes in oxidising potential of the substances then it can be concluded that no classification is therefore required across the lithium /calcium borate substances including the UVCB target -  Reaction products of boric acid and calcium dihydroxide and lithium hydroxide.