3-[(3-sulfanylbutanoyl)oxy]-2,2-bis{[(3-sulfanylbutanoyl)oxy]methyl}propyl 3-sulfanylbutanoate

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Between 07 January 2009 and 17 April 2009.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results.

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: BS4633: Method for the Determination of Crystallizing Point.

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

Date of inspection: 19th August 2008 Date of signature: 4th March 2009 :

Type of method:

method to determine freezing temperature

Remarks:

dry ice/acetone bath

Key result

Melting / freezing pt.:

< 253 K

Atm. press.:

ca. 1 013 hPa

Cooling data for Determinations 1 and 2 are shown in the following tables:

Table 1: Determination 1

Time(s)	Temperature (K)	Time(s)	Temperature (K)
0	293	1140	259
30	293	1170	259
60	292	1200	258
90	290	1230	258
120	288	1260	258
150	286	1290	258
180	285	1320	258
210	285	1350	257
240	283	1380	257
270	281	1410	257
300	280	1440	257
330	279	1470	257
360	277	1500	257
390	277	1530	256
420	275	1560	256
450	273	1590	256
480	272	1620	256
510	271	1650	256
540	270	1680	256
570	269	1710	256
600	269	1740	255
630	268	1770	255
660	267	1800	255
690	267	1830	255
720	266	1860	255
750	266	1890	255
780	265	1920	254
810	264	1950	254
840	263	1980	254
870	263	2010	254
900	262	2040	254
930	262	2070	253
960	261	2100	253
990	261	2130	253
1020	260	2160	253
1050	260	2190	252
1080	260	2220	252
1110	259	2250	252

Observations:           The test material became increasingly viscous during cooling.
Result:                       Freezing temperature <253 K

Table 2: Determination 2

Time(s)	Temperature (K)	Time(s)	Temperature (K)
0	294	1140	260
30	293	1170	260
60	293	1200	260
90	292	1230	259
120	290	1260	259
150	287	1290	259
180	286	1320	258
210	284	1350	258
240	283	1380	258
270	281	1410	258
300	279	1440	258
330	278	1470	258
360	278	1500	258
390	277	1530	257
420	275	1560	257
450	273	1590	257
480	272	1620	257
510	271	1650	257
540	270	1680	256
570	269	1710	256
600	269	1740	256
630	268	1770	255
660	267	1800	255
690	267	1830	255
720	266	1860	254
750	266	1890	254
780	265	1920	254
810	264	1950	254
840	263	1980	254
870	263	2010	253
900	262	2040	253
930	262	2070	253
960	262	2100	253
990	261	2130	252
1020	261	2160	252
1050	261	2190	252
1080	261	2220	252
1110	260	2250	251

Test conducted under atmospheric pressure condition, decomposition/sublimation, as well as decomposition /sublimation temperature is not specified.

Conclusions:

The freezing temperature of the test material has been determined to be less than 253 K at ambient pressure.

Executive summary:

Melting/Freezing Temperature. Determined to be less than 253 K, using BS4633: Method for the Determination of Crystallizing Point, Method A.1 Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 102 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

Description of key information

The melting/freezing temperature of the substance was determined to be < -20 °C (< 253 K) at ambient atmospheric pressure according to OECD Guideline 102. 

Additional information

A dry ice/acetone bath equipped with a thermometer was used to determine the properties of the substance at temperatures down to -20 °C. Temperature and observations of the test material were recorded approximately every 30 seconds. During cooling, the substance became increasingly viscous. Freezing was not observed down to -20 °C, therefore the freezing temperature of the substance is < -20 °C (< 253 K) at ca. 1013 hPa.