(2-hydroxyethyl)ammonium mercaptoacetate

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:

2008

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

GLP compliance:

yes (incl. QA statement)

Type of method:

method to determine freezing temperature

Key result

Melting / freezing pt.:

< 253 K

Atm. press.:

ca. 1 013 hPa

Decomposition:

no

Sublimation:

no

Remarks on result:

other: no freezing point detectable

An aliquot of test material was placed into a test tube containing a thermometer. A wire loop with which the sample could be agitated was placed inside the tube to ensure sample homogeneity during cooling. The test tube was surrounded by a glass jacket and then placed into a large beaker containing a dry ice/acetone mixture. The temperature and observation of the test material were recorded approximately every 30 seconds.

 

The dry/ice acetone bath was maintained until the temperature had reached approximately -20°C. The determination was carried out in duplicate. Graphs of temperature versus time (seconds) were constructed to obtain the freezing temperature.

Conclusions:

No freezing temperature could be detected in the range down to -20°C (253 K)

Description of key information

No freezing point could be detected down to -20°C (253 K).

Additional information

Three measurements with the test tube method down to -20°C showed no freezing point.