Sodium hydroxymethanesulphonate

Boiling point

Administrative data

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

18 to 25 Sep 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Cross-reference

Reason / purpose for cross-reference:

reference to other study

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

18 to 25 Sep 2018

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)

Version / remarks:

27th July 1995

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Decomposition:

ambiguous

Decomp. temp.:

>= 184 °C

Remarks on result:

not determinable

The test item shows no melting of the main component up to 184 °C, according to the definition in the OECD Guideline 102 (mean value from repeat determination).

 

185 °C (from first measurement)

184 °C (from second measurement)

184 °C (from third measurement)

 

From 184 °C the test item shows an endothermic effect (decomposition presumably - a melting > 184 °C can't be excluded).

 

The possible decomposition temperatures according to

- the melting results (184 °C)

- the boiling results (192 °C - see section 4.3)

differ due to different measuring conditions (melting - capsulated crucible / boiling- partially capsulated).

 

The cooling runs do not show a crystallization of the main component.

 

At approximately 49 °C the test item shows an endothermic effect. This effect is possibly melting of a part component and / or a solid-solid phase transformation.

In the temperature range between about 82 °C and 94 °C the test item shows a further endothermic effect. This effect is possibly melting of a part component, evaporating of a part component and / or a solid to solid phase transformation.

These effects do not correlate with the melting of the test item (main component) which was verified by subsequent tests with the Kofler-heating bank.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Version / remarks:

27th July 1995

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Remarks:

confirmed by means of TGA

Test material

Test material information

Constituent 1

Reference substance name:

Sodium hydroxymethanesulphonate

EC Number:

212-800-9

EC Name:

Sodium hydroxymethanesulphonate

Cas Number:

870-72-4

Molecular formula:

CH3O4S.Na

IUPAC Name:

sodium hydroxymethanesulfonate

Results and discussion

Boiling point

Boiling pt.:

>= 192 °C

Atm. press.:

1 007 mBar

Decomposition:

ambiguous

Decomp. temp.:

>= 192 °C

Any other information on results incl. tables

The test item shows a boiling and/or thermal decomposition earliest at approx. 192 °C (at 1007 mBar) according to the definition in the OECD guideline 103.

 

192 °C (from first measurement)

191°C (from second measurement)

192 °C (from third measurement)

 

From 192 °C the test item shows a boiling and/or thermal decomposition with evaporation of the decomposition components.

The DSC measurements were confirmed by means of TGA measurements under the same measuring conditions.

The start of the area of boiling temperatures is defined by using the on-set temperature.