Fatty acids, C14-18 and C16-18-unsatd., zinc salts

Boiling point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

2017-07-05

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Version / remarks:

1995

Deviations:

yes

Remarks:

no pressure was stated, only one determination was conducted

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Version / remarks:

2008

Deviations:

yes

Remarks:

no pressure was stated, only one determination was conducted

GLP compliance:

no

Type of method:

other: thermal gravimetric analysis (TGA)

Atm. press.:

1 013.25 hPa

Decomposition:

yes

Decomp. temp.:

> 300 °C

Remarks on result:

other: no pressure was stated, 1013.25 hPa were assumed

Temperature of decomposition: > 300 °C

Conclusions:

The temperature of decomposition of zinc ditetradecanoate is > 300 °C.

Reference 2

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

2010-05-10 to 2010-05-11

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Version / remarks:

2008

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

- Name of test material (as cited in study report): Zincum SW/F
- Molecular formula: (C16H31O2)2Zn (27.4 %), (C18H35O2)2Zn (67.1 %)
- Molecular weight: (C16H31O2)2Zn: 576.22 g/mol, (C18H35O2) 2Zn: 632.33 g/mol
- Physical state: solid, white powder, characteristic odour
- Storage condition of test material: keep container tightly closed; keep container in a cool, well ventilated area

Decomposition:

yes

Decomp. temp.:

ca. 330 °C

Remarks on result:

other: The test item started to decompose at at 330°C and the decomposition product started boiling at 398°C.

The DSC-measurement under nitrogen indicates an endothermic effect in the temperature range 90 -140 °C (onset 117 °C). The test item started melting. A second endothermic effect was observed in the temperature range 350 -480 °C due to decomposition and boiling of the substance. A black residue remained at the end of the test after cooling in the crucible. Approx. 86 % of the material had volatilized from the crucible during the test. Measurements of the capillary method confirmed the results.

Conclusions:

As the substance started decomposing at approximately 330 °C before boiling, no boiling point could be determined.

Reference 3

Endpoint:

boiling point

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is a solid which decomposes before boiling

Description of key information

The substances `Fatty acids, C16-18, zinc salts´ and `Zinc dimyristate´(C14), have melting points of 121 °C and an melting range between 127.7 - 136.6° °C (peak 133.7 °C) (see supporting robust study summaries section 4.2 melting point), respectively and starts decomposing at approximately 330 °C and > 300 °C, respectively before boiling, therefore no boiling point could be determined. A similar behaviour is assumed for `Fatty acids, C14-18 and C16-18-unsatd., zinc salts´ (melting point 101 °C) as the melting points of the substances are similar.