Reaction products of boric acid and calcium dihydroxide and lithium hydroxide

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosive properties of explosives

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 explosive 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 explosive 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 conducted.

Remarks:

No groups identified associated with explosive properties.

Interpretation of results:

GHS criteria not met

Conclusions:

Reaction products of boric acid and calcium dihydroxide and lithium hydroxide contains no functional groups imparting explosive properties. It is beyond reasonable doubt that the material will not exhibit explosive properties.

Executive summary:

According to the OECD testing methods publication, test A14 need not be carried out when examination of the structural formula establishes beyond reasonable doubt that the substance has no explosive properties. A theoretical assessment was performed on dilithium tetraborate and on calcium metaborate and concluded that the substances contained no functional groups imparting explosive properties. Reaction products of boric acid and calcium dihydroxide and lithium hydroxide contain 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. It is beyond reasonable doubt that the material will not exhibit explosive properties.

Description of key information

A theoretical assessment was performed on dilithium tetraborate and on calcium metaborate and concluded that the substances contained no functional groups imparting explosive 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 explosive potential of these substances.

Key value for chemical safety assessment

Explosiveness:

non explosive

Justification for classification or non-classification

Examination of the structural formula for dilithium tetraborate  and on calcium metaborate indicated that there are no chemical groups associated with explosive properties. As Reaction products of boric acid and calcium dihydroxide and lithium hydroxide contains the same functional groups as these source substances it is expected to be non-explosive too. In addition, the substance is inorganic and the oxygen balance is therefore not applicable. Based on this combination of factors, it is beyond reasonable doubt that the material will not exhibit explosive properties. No classification is therefore required.