Butyllithium

Boiling point

Administrative data

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

2008-12-08 to 2008-12-11

Reliability:

1 (reliable without restriction)

Cross-reference

Cross-reference 1

Reason / purpose for cross-reference:

reference to same study

Cross-reference 2

Reason / purpose for cross-reference:

reference to other study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2008

Report date:

2008

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Version / remarks:

1995

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Version / remarks:

1992

Deviations:

no

Principles of method if other than guideline:

NA

GLP compliance:

not specified

Type of method:

differential scanning calorimetry

Test material

Test material information

Constituent 1

Reference substance name:

Butyllithium

EC Number:

203-698-7

EC Name:

Butyllithium

Cas Number:

109-72-8

Molecular formula:

C4H9Li

IUPAC Name:

butyllithium

Details on test material:

- Name of test material (as cited in study report): n-Butyllithium 90% in Hexan
- Lot/batch No.: 145-0

Results and discussion

Any other information on results incl. tables

A boiling point at standard pressure could not be determined.

Applicant's summary and conclusion

Conclusions:

A boiling point of n-buthyllithium (90%, in hexane) at standard pressure could not be determined.

Executive summary:

The determination of the boiling point was performed with n-Butyllithium according to OECD Guideline 103 and EU method A.2. The measurements were performed three times over the complete temperature range. The resulting enthalpy flow yielded unexpected curves. All three results are very similar. No thermal effect was recorded around 70 degree C (boiling point of Hexane: 68 degree C). Instead a very sharp endothermic peak was recorded at approx. 140 degree C, followed by another peak at 167 degree C (Peak maximum temperature). The course of the curve between the two peaks shows some noise. Inspecting the crucibles very closely after the measurements some deposit was found around the 50 um-hole on all crucibles. It is suspected, that, although care was taken to exclude all moisture in the sample handling, still traces of humidity seem top have reacted with sample vapour and reaction products clogged up the small hole. Therefore no evaporation from the crucible took place until enough pressure had built up inside to blow out the hole. That resulted in the very sharp peak. Finally, a boiling point of n-Buthyl lithium (90%, in hexane) at standard pressure could not be determined.