Benzenesulfonic acid, 4-C10-13-sec-alkyl derivs., ammonium salts

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

19 June 2017 and 25 September 2017.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Study was conducted in accordance with international guidelines and in accordance with GLP. All guideline validity criteria were met.

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Version / remarks:

Regulation (EC) 440/2008 of 30 May 2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Version / remarks:

July 1995

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

photocell detection

Key result

Boiling pt.:

100.9 °C

Atm. press.:

101.3 kPa

Decomposition:

no

Remarks on result:

other: Mean value arising from Test 1 and Test 2.

Remarks:

Mean value has been corrected to standard pressure.

Boiling pt.:

101.3 °C

Atm. press.:

101.3 kPa

Decomposition:

no

Remarks on result:

other: Test 1

Remarks:

Measured boiling temperature has been adjusted to standard pressure.

Boiling pt.:

100.4 °C

Atm. press.:

101.3 kPa

Decomposition:

no

Remarks on result:

other: Test 2

Remarks:

Measured boiling temperature has been adjusted to standard pressure.

The boiling point is defined as the temperature at which the vapour pressure equals the standard atmospheric pressure.

The mean of at least two measurements is reported as the boiling temperature. If no boiling point could be determined (e.g. decomposition or sublimation of the test item) no main test was performed. The observed effect and the temperature at which it is observed are reported. If the test item did not boil at a temperature ≤ 673 Kelvin the boiling point is reported as > 673 Kelvin.

The determined value of the atmospheric pressure was processed by the apparatus for the determination of the boiling point and a pressure corrected value for the boiling point of the test item is given.

If no clear/distinct boiling point could be observed (e.g. if the test item consisted of several compounds) a boiling range is reported.

Table 4       Experimental Results

Test No.	Atmospheric Pressure (hPa)	Boiling Temperature		Boiling Point*
		K	℃	K	℃
1	997	374.0	100.8	374.5	101.3
2	997	373.1	99.9	373.6	100.4
Mean:				374.1	100.9

* Boiling point: boiling temperature corrected to standard pressure of 1013 hPa.

Following the outcome of the preliminary test, the main test was started at 92 °C with a heating rate of 0.5 K/min.

Conversion of Units (K to °C):     t = T-273.15 (t in °C and T in K)

Calculation of boiling point: Using Sidney Young equation, as per EU A.2./OECD 103.

Conclusions:

The boiling temperature of the test item has been determined to be 100.9 ± 0.5 °C (374.1 ± 0.5 K) at 1013 hPa (atmospheric pressure).

Executive summary:

EU Method A.2. – The boiling point of the test item was determined using photocell detection.  The procedure employed was designed to be compatible with Method A.2. Boiling Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008.

Two determinations were carried out.  Aliquots of test item (5 – 10 mm) were placed in capillary tubes fused at one end and subjected to a thermal program from 10 K above ambient to 673 K.  Heating was at a constant rate of 5K/min.  The boiling point was reached when the flow of vapour bubbles reached a frequency of 0.6 Hz.  The mean of both determinations is reported as the boiling temperature.

The thermographic data was used to determine the boiling point of the test item as 100.9 °C ± 0.5 °C at 1013 hPa.

Description of key information

Boiling Point: 100.9 °C ± 0.5 °C (374.05 K ± 0.5 K); EU Method A.2.; C Bär (2017)

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

100.9 °C

Additional information

EU Method A.2. – The boiling point of the test item was determined using photocell detection.  The procedure employed was designed to be compatible with Method A.2. Boiling Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008.

Two determinations were carried out.  Aliquots of test item (5 – 10 mm) were placed in capillary tubes fused at one end and subjected to a thermal program from 10 K above ambient to 673 K.  Heating was at a constant rate of 5K/min.  The boiling point was reached when the flow of vapour bubbles reached a frequency of 0.6 Hz.  The mean of both determinations is reported as the boiling temperature.

The thermographic data was used to determine the boiling point of the test item as 100.9 °C ± 0.5 °C at 1013 hPa.