Naphthenic acids, zinc salts, basic

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:

2013-03-22 to 2013-03-25

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

signed, 2011-04-11

Type of method:

method to determine freezing temperature

Key result

Melting / freezing pt.:

< -80 °C

Pre Test

No complete solidification was observed at all temperatures; therefore, no main study could be performed

Room Temperature	5°C	-20°C	-80°C
Viscous and gluey	More viscous and sticky	Sticky, high viscous liquid	Partially crystalline but still sticky

As the test item was still sticky at -80 °C, the test item was not completely solidified. A melting point or melting range of the test item VP 112/18 could not be determined, as the test item is not completely solidified at – 80 °C and no main study was carried out. Therefore, the melting point is stated as < – 80 °C (< 193.15 K).

According to Regulation (EC) No 1907/2006, Annex VII, Section 7.2, Column 2, the determination of the melting point does not need to be conducted below a lower limit of -20 °C.

No observations were made which might cause doubts on the validity of the study outcome. Therefore, the result of the study is considered valid.

Conclusions:

A melting point or melting range of the test item VP 112/18 could not be determined, as the test item is not completely solidified at – 80 °C and no main study was carried out. Therefore, the melting point is stated as < – 80 °C (< 193.15 K).

According to Regulation (EC) No 1907/2006, Annex VII, Section 7.2, Column 2, the determination of the melting point does not need to be conducted below a lower limit of -20 °C.

Description of key information

Naphthenic acids, zinc salts, basic has a melting point < - 80 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-80 °C

Additional information

A melting point or melting range of naphthenic acids, zinc salts, basic could not be determined, as it is not completely solidified at – 80 °C and no main study was carried out. Therefore, the melting point is stated as < - 80 °C.