Ethylene bis[3,3-bis(3-tert-butyl-4-hydroxyphenyl)butyrate]

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Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The study was conducted according to an appropriate EU test method and an appropriate national guideline.

Qualifier:

according to guideline

Guideline:

EU Method A.16 (Relative Self-Ignition Temperature for Solids)

Qualifier:

according to guideline

Guideline:

other: VDI 2263, sheet 1

GLP compliance:

not specified

Relative self-ignition temperature:

240 °C

Remarks on result:

other: test substance in mixture with Kieselghur

Remarks:

at atm. press. of 1013.0 hPa

In the investigation of self-ignition in the Grewer-oven for the pure test item and for the test item in mixture with Kieselghur an endothermic process was detected at 60°C, which may indicate e.g. a glass transition of the test item. For the pure test item no exothermal or further endothermic effect is detected up to the maximum temperature of about 400°C. After the measurement the basket of the pure test item is empty. The complete test item flowed out of the basket. According to the Certificate of Analysis the test item liquify at a temperature of 169°C. This indicates that the test item liquified over the measurement up to 400°C and flowed out of the wire basket before the self-heating took place.

The test item in mixture with Kieselghur indicated a multi-stage exothermal effect at 240°C which leads to a maximum temperature of 650°C.

Conclusions:

No self-ignition temperature for the pure test substance could be determined. No self-ignition is observed up to the maximum temperature of 400°C.
A self-ignition temperature of 240°C at 1013 hPa was determined for the test substance in mixture with Kieselghur in a reliable study conducted according to an appropriate EU test method.

Executive summary:

The pure product indicated an endothermic effect at 60°C (e.g. glass transition). In the measurement up to about 400°C the substance flowed out of the basket. For the pure substance no self-ignition was detected. The product in mixture with Kieselghur indicates a self ignition starting at 240°C.

The product has neither to be classified as self-heating substance in Division 4.2 according to the UN-Transport regulation nor as self-heating substance according to GHS or EC1278/2008) (CLP-Guideline) Annex 1,; 2.11, respectively. The test item has no self-ignition temperature according to EC 440/2008, Annex V, Part A, A.16. up to the melting of the test item of the maximum temperature of 400°C, respectively.

Description of key information

Self-ignition temperature: not relevant
Self-ignition temperature (Kieselghur mixture): 240°C at 1013 hPa

Additional information

A self-ignition temperature could not determined for the pure substance in a reliable study conducted according to an appropriate EU test method;

the test substance liquified below the maximum temperature of 400°C and no self-ignition was detected. A self-ignition temperature of 240°C was determined for the mixture of the test substance with Kieselghur 50 %(w/w).

In accordance with Column 2 adaptation statement of REACH Annex VII, information requirement section 7.12, this study does not need to be conducted for solids if preliminary results exclude self-heating of the substance up to 400 °C.