2-propanol and 2-butanol production, distn. residues

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:

6 July - 12 July 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Fully documented study run under GLP and according to international guidelines.

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

GLP compliance:

yes (incl. QA statement)

Type of method:

capillary method

Key result

Melting / freezing pt.:

< -80 °C

Atm. press.:

ca. 1 atm

Decomposition:

no

Sublimation:

no

Pre-test: the test item was filled into glass vessels and stored at –80 and –20 °C.

Conclusions:

The melting point of the test item is < -20°C. Therefore, no further testing is required according to Annex VII of REACH.

Executive summary:

No melting point or range could be detected. The melting point or range of the test item is < -80 °C (< 193.15 K). No further testing is required according to Annex VII of REACH as the melting point is < -20°C.

Description of key information

The melting point of reaction mass of 2,2'-oxybisbutane (DSBE), DIPE, SBA and 2-methylpropan-2-ol (TBA) is < -80 °C. As the melting point does not need to be determined below a lower limit of -20 °C (Annex VII of REACH), no main study was performed to determine the exact value.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-80 °C

Additional information

The melting point of reaction mass of 2,2'-oxybisbutane (DSBE), DIPE, SBA and 2-methylpropan-2-ol (TBA) was assessed according to OECD 102 resp. EU A.1 under GLP. In the study pre-test, the test item cooled to -80 °C was still liquid after six days of storage at this temperature. As the melting point does not need to be determined below a lower limit of -20 ° C (Annex VII of REACH), no main study was performed to determine the exact value.