Dipotassium hexafluorotitanate

Auto flammability

Administrative data

Endpoint:

relative self-ignition temperature (solids)

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

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:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Rather outdated, but methods and results described in sufficient detail.

Principles of method if other than guideline:

The thermal decomposition was studied in platinum dishes in an electric muffle furnance, temperature was recorded and regulated by a platinum thermocouple and electronic potentiometer. The thermogram was recorded on a Kurnakov apparatus. The intermediate and final decompositionproducts were subjected to chemical X-ray structure analyses (URS-60apparatus with CuKα radiation) and crystal- optical examination.

Decomposition:

yes

Decomp. temp.:

> 400 °C

The thermal stability of potassium hexafluorotitanate in the absence of a protective atmosphere has been studied up to 1000°C. Thermal, x-ray, and chemical analysis in conjunction with an optical examination showed that potassium hexafluorotitanate is converted according to the following scheme (see attached image). K2TiF6 is stable up to at least 400°C (a phase transformation takes place between ca. 323-370°C). At higher temperatures, conversion to various oxi-fluorides and oxides takes place. Such conversions are not considered relevant for the risk assessment.

Data source

Reference

Reference Type:

publication

Title:

Thermal decomposition of potassium hexafluorotitanate.

Author:

Sorokin, I.P. et al.

Year:

1966

Bibliographic source:

Russ. J. Inorg. Chem. 11, 1524-1526 [Zhurnal Neorganicheskoi Khimii 11(12), 2833-5]