Zeolite, silica and sodium and titanium based, crystalline, synthetic, non fibrous

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

08 Sep - 09 Oct 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

Storage conditions: dry at ambient temperature (10 - 30 °C)

Atm. press.:

>= 999 - <= 1 008 hPa

Remarks on result:

not determinable

Remarks:

No melting point detected up to 500 °C at atmospheric pressure.

Results
In the temperature range of 230 – 350 °C, a broad endothermic effect was seen.

Table 1 – Results of the DSC measurements

Sample weight [mg]	Onset of effect [°C]	Range of effect [°C]	Weight loss [mg]
11.90	242.16	230 – 350 (endo)	1.97
11.28	238.10	230 – 350 (endo)	1.99

 

The broad endothermic effect seen in the temperature range of 230 – 350 °C cannot be clearly assigned to the melting of the test item. Furthermore, the test using the melting point apparatus showed no melting of the test item in the temperature range from ambient temperature to 434 °C, and no change of appearance of the test item was seen. Therefore, the test item has no melting point in the temperature range of 25 – 500 °C.

Conclusion
The test item has no melting point up to a temperature of 500 °C at atmospheric pressure (999 – 1008 hPa) as determined by DSC.

Description of key information

The test item has no melting point up to a temperature of 500 °C at atmospheric pressure (OECD 102, DSC).