Tetrasodium enneatitanium icosaoxide hydrate

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

the study does not need to be conducted because the substance is a solid which decomposes before boiling

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING
In accordance with column 2 of REACH Annex VII, the boiling point study (required in section 7.3) does not need to be conducted if the melting point of a solid is above 300 °C. The substance's melting point is > 450 °C as determined in the Melting/Freezing Temperature test performed according to test guidelines.

Furthermore, in accordance with the test guideline "Method A2 Boiling Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008" the determination of boiling point is not required if the melting point is above 450 °C.

Also, a supporting study performed by A. Clearfield and J. Lehto (1988) indicates that the substance decomposes before melting at temperatures above 700 °C.

Cross-reference

Reason / purpose for cross-reference:

data waiving: supporting information

Reference

 Thermal analysis (differential scanning calorimetry (DSC)):  Melting point > 450 °C at 1,013 hPa (OECD 102, EU Method A.1, GLP)

Melting / freezing point at 101 325 Pa:

450 °C

The melting point study determined that the substance does not melt at temperatures below 450 °C. Visually, the samples did not change during the study. In a supporting study by Clearfield and Lehto (1988) the substance has been found to decompose before melting at very high temperatures (above 700 °C).