Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
6 October 2011 to 9 December 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study conducted in accordance with OECD and EU guidelines.
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: OECD 113 (1981) Screening test for thermal stability and stability in air
Deviations:
no
GLP compliance:
no
Type of method:
thermal analysis
Melting / freezing pt.:
> 500 °C
Decomposition:
yes
Remarks on result:
other: It can be assumed that the test item underwent endothermic and exothermic decompositions (partial discolouration to black).

The first DSC-measurement in a closed glass crucible with the test item showed a first endothermic effect in the temperature range 235 °C to 285 °C. This effect is followed directly by an exothermic effect in the temperature range 285 °C to 310 °C with an energy of 15 J/g. In the temperature range 320 °C to 355 °C a second endothermic effect was observed. No further exothermic or endothermic effects were observed up to the final temperature (400 °C).

The second DSC-measurement in a closed glass crucible with the test item showed an endothermic effect in the temperature range 230 °C to 280 °C. No further exothermic or endothermic effects were observed up to the final temperature (500 °C).

An optical inspection showed a discolouration to black after both measurements.

Conclusions:
The test item, bismuth subsalicylate, has a melting point > 500 °C under atmospheric conditions. It can be assumed that the test item underwent endothermic and exothermic decompositions (partial discolouration to black).
Executive summary:

The purpose of this study was the determination of the thermal stability and melting point of the test item according to the European Commission Regulation (EC) No. 440/2008, Part A: Methods for the determination of physico-chemical properties. A.1. Melting point / melting range and OECD test guidelines, OECD 102 (1995) Melting point/melting range, OECD 113 (1981) Screening test for thermal stability and stability in air.

An optical inspection of the test item after the measurement showed a partial discolouration to black. The test item showed smouldering directly after the measurement. The test item was still a powder. Due to the optical inspection it can be concluded, that the test item has no melting point up to 500 °C. It can be assumed that the test item underwent endothermic and exothermic decompositions (partial discolouration to black).

Description of key information

Bismuth subsalicylate has a melting point of greater than 500 °C

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
500 °C

Additional information

A study was conducted to determine the thermal stability and melting point of the test item according to the European Commission Regulation (EC) No. 440/2008, Part A: Methods for the determination of physico-chemical properties. A.1. Melting point / melting range and OECD test guidelines, OECD 102 (1995) Melting point/melting range, OECD 113 (1981) Screening test for thermal stability and stability in air.

Due to the optical inspection it can be concluded, that the test item has no melting point up to 500 °C. It can be assumed that the test item underwent endothermic and exothermic decompositions (partial discolouration to black).