Reaction mass of sodium 1-methoxy-1-oxohexadecane-2-sulphonate and sodium methyl 2-sulphooctadecanoate

Boiling point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

Not stated

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Remarks:

Acceptable publication which meets basic scientific principles. The study is performed according to OECD guidelines. Please see overall remarks.

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

not specified

GLP compliance:

no

Type of method:

other: presumably DSC

Decomposition:

yes

Decomp. temp.:

ca. 290 °C

Remarks on result:

other: No boiling point.

Conclusions:

The test substance decomposed at ca. 290 ºC and had no boiling point.

Reference 2

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

June 12 - September 21, 2000

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study without detailed documentation

Remarks:

Although the method was not described in detail, the guideline was clearly stated: the test was carried out according to OECD guidelines. Kurume Laboratory is furthermore a well-known and trustworthy, respected laboratory. The signature and name of the author was not present, but this is because the report was an English translation of a Japanese study.

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

not specified

Principles of method if other than guideline:

The study was performed according to an established method recommended by OECD 102. It was not stated whether the endpoint was based on a single measurement or duplicate measurements.

GLP compliance:

no

Type of method:

method according to Siwoloboff

Decomposition:

yes

Decomp. temp.:

ca. 260 °C

Remarks on result:

other: Boiling point was not measurable.

Substance turns brown at temperatures in the vicinity of 260ºC.

Conclusions:

No boiling point could be measured. Substance turns brown at temperatures in the vicinity of 260ºC.

Reference 3

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

25 September 2006

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Remarks:

Although the test was not performed under GLP, the test has been conducted according to OECD guidelines and is well documented. The name of the staff performing the test was identified in the report (Miyuki Miyake).

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

not specified

Principles of method if other than guideline:

It seems that the endpoint was based on a single measurement rather than duplicate measurements.

GLP compliance:

no

Type of method:

differential thermal analysis

Remarks:

thermogravic and differential thermal analysis

Decomposition:

yes

Decomp. temp.:

ca. 290 °C

Remarks on result:

other: No boiling temperature was determined.

The report presented the TG-DTA curves and gave the following interpretation:

In order to detect the oxydizing resolution temperature, DTA analysis was adopted. For TG-DTA analysis, the open cells were used and it was also possible to check the decreased weight. The TG curve of C18MES showed a sharp decreased weight around 290 ºC and also made sure the color was changed to brown. The DTA curve showed some absorbing peaks around this temperature according to the resolution. This interpretation is considered to be accurate,

Conclusions:

According to the TG-DTA method, decomposition of the test material was observed at ca. 290ºC.

Description of key information

Data for main components:

C16MES: No boiling point; decomposition of the test substance at about 260 ºC

C18MES: No boiling point; decomposition of the test substance at 290 ºC

Data for similar substance with lower alkyl chain length:

C14MES: No boiling point; decomposition of the test substance at 290 ºC

Additional information

As the reaction mass of sodium 1-methoxy-1-oxohexadecane-2-sulphonate and sodium methyl 2-sulphooctadecanoate consists of a typical concentration of > 45% sodium 1-methoxy-1-oxohexadecane-2-sulphonate (C16MES) and <40% sodium methyl 2-sulphooctadecanoate (C18MES), the data of the 2 separate components can be used to predict the boiling point of the reaction mass. Both data sets of the components received Klimisch values 2 and result in a similar range of decomposition temperatures. Furthermore, also the result of a supporting substance C14MES gives a decomposition temperature of the same magnitude.

It is concluded that the endpoint of the boiling point is sufficiently covered by the available data of the separate components and that the decomposition temperature of the reaction mass lies in the vicinity of 260ºC.