Diphosphoric acid, compd. with piperazine (1:1)

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

13 August - 29 September 2003

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Version / remarks:

Official Journal of the European Communities L383A volume 35, 29 December 1992

Deviations:

no

Remarks:

: according to the Guideline in force at the time the test was performed, measurements could be performed at different temperatures

GLP compliance:

yes (incl. QA statement)

Type of method:

gas saturation method

Key result

Temp.:

39 °C

Vapour pressure:

< 0 Pa

Remarks on result:

other: no substance detected in the desorption solution

Key result

Temp.:

49 °C

Vapour pressure:

0 Pa

For details on results of the gas saturation experiments with the test substance at 49 °C see attachment “T-1063FM – results vapour pressure.pdf”. Average vapour pressure at 49 °C: 5.8 * 10-5 Pa.

 

In the gas saturation experiments at 39 °C, no test substance was detected in the eluent. Taking into account the detection limit of 5.3 mg/L it can be calculated that, at the highest flow rate used, less than 6.8 μg of the test substance is carried by the gas to the adsorbent. Using the detection limit of the CE method it can be calculated that the vapour pressure at 39 °C must be smaller than 6x10E-6 Pa.

Conclusions:

At a temperature of 39 °C there was no substance detected in the desorption solutions. lt is calculated that the vapour pressure at 39 °C must be smaller than 6 x 10E-6 Pa. Consequently it is concluded that the vapour pressure at 25°C must be smaller than 6 x 10E-6 Pa.

Description of key information

< 6x10E-6 Pa at 25°C (EU method A.4)

Key value for chemical safety assessment

Vapour pressure:

0 Pa

at the temperature of:

49 °C