Boric acid, zinc salt

Boiling point

Administrative data

Endpoint:

boiling point

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 a solid which melts above 300°C

Cross-reference

Reason / purpose for cross-reference:

data waiving: supporting information

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Remarks:

no GLP

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Melting / freezing pt.:

> 600 °C

Decomposition:

no

Sublimation:

no

Remarks on result:

other: no informationon atm. pressure available

Conclusions:

The study is well documented, meets generally accepted scientific principles, is acceptable for assessment and therefore reliability of Klimisch 2 has been assigned.
Three DSC measurements were performed. All three measurements had different peak behaviour but no clear events. In the pre-test the substance had shrivelled slightly. This could be a sign that a chemical compound is breaking down. Therefore, the melting point under these test conditions should be >600 °C.

Executive summary:

The determination of the melting point of zinc metaborate was performed via DSC (differential scanning calorimetry according to OECD 102 resp. EU A.1.

No clear event was detected. Based on the observation in the pre-test the melting point of the test substance should be stated as > 600 °C.

The measurement of indium after calibration met the validity criteria. Therefore, the result of the study is considered valid.