Butyllithium

Viscosity

Administrative data

Endpoint:

viscosity

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

Qualifier:

according to guideline

Guideline:

OECD Test Guideline 114 (Viscosity of Liquids)

Version / remarks:

1981

Deviations:

no

Principles of method if other than guideline:

NA

GLP compliance:

not specified

Type of method:

capillary viscometer (static)

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

Viscosity

Temp.:

20°C

Parameter:

kinematic viscosity (in mm²/s)

Value:

ca. 20.1

Remarks on result:

other: no remarks

Any other information on results incl. tables

No remarks

Applicant's summary and conclusion

Conclusions:

Kinematic viscosity of n-Butyllithium 90% in hexane at 20 degree C: ca. 20.1 mm2 s-1
However, due to the fact that only one run could be performed and that the sample had obviously already reacted with traces of moisture, thereby changing its viscosity, the results can not be considered as reliable.

Executive summary:

This endpoint is not required for intermediates at tonnage band above 1000 t/a.

The measurement was performed according to OECD Guideline 114.The determination could only be performed once. In the second run the upper photo sensor did not detect the samples surface, probably due to a deposit on the capillary walls. As a result the sample spilled over and the measurement had to be stopped immediately. It was also noticed that the samples appearance had changed between taking a subsample from the original vessel (under protective gas in a glove box) and introducing it into the capillary as well as during the course of the viscosity measurement itself. Originally a yellowish liquid with a white sediment, and seemingly low viscosity, the sample at the time of the measurement appeared more flocculated and white with a higher viscosity. During the measurement the sample became even more hazy (grey). Again, greatest care was taken to protect the sample from moisture, but the Ubbelohde viscosimeter is a system generally open to the environment and can obviously only be protected with inert gas to a certain extent. The kinematic viscosity at 20 degree C was determined to be ca. 20.1 mm2 s-1. However, due to the fact that only one run could be performed and that the sample had obviously already reacted with traces of moisture, thereby changing its viscosity, the results can not be considered as reliable.