Registration Dossier

Administrative data

Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
February 2013
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Non GLP study, available as unpublished report, no restrictions, fully adequate for assessment.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013
Report Date:
2013

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
DSC analysis was used to determine the boiling point.
GLP compliance:
no
Type of method:
differential scanning calorimetry

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
liquid
Remarks:
Homogenous Liquid
Specific details on test material used for the study:
Trade name: CYPHOS IL 101 Phosphonium Salt
Physical state: liquid
Composition of test material, percentage of components: Trihexyl(tetradecyl)phosphonium chloride (258864-54-9), > 95%
Lot/batch No.: WEC031280
Expiration date of the lot/batch: >1 year (March 2016) when stored at room temperature and protected from direct contact with water (hydrophobic)

Results and discussion

Boiling point
Decomposition:
yes
Decomp. temp.:
>= 345.2 °C

Any other information on results incl. tables

Two replicate DSC analyses were performed and provided the following results:

1: 344.8

2: 345.5

Mean value: 345.2.

The shape of the DSC curves indicates that the test material has a boiling point and a decomposition simultaneously occurring. The endothermic peaks are broad with erratic behavior. This is an indication of onset of boil followed directly by decomposition. Decomposition is confirmed by analyzing the test substance at four different heating rates (Thermogravimetric analysis - TGA) and observing a different onset each time. Boiling point is a first order reaction independent of heating rate. If the thermal event was a boiling point, the onset temperature would be consistent.

TGA Results

T5 (°C)

T10 (°C)

T20 (°C)

T50 (°C)

307

344

361

382

303

341

357

379

Applicant's summary and conclusion

Conclusions:
The test substance decomposes upon boiling at 345.2°C.
Executive summary:

In this study the boiling point of Trihexyltetradecylphosphonium chloride was measured by DSC analysis. This analysis was followed by a TGA to show that the substance does not undergo boiling but decomposes from 345.2 °C.