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

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

14 February - 24 June 2003

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Version / remarks:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

distillation method

Key result

Atm. press.:

101.9 kPa

Decomposition:

yes

Decomp. temp.:

>= 306 °C

Remarks on result:

other: The boiling temperature could not be determined.

At a heating mantle temperature of approximately 579.1 K (306 °C) the test substance started to decompose and produced a yellow condense. At a mantle temperature of 729.1 K (456 °C) the decomposed test substance started to reflux and produced a yellow vapour. At a mantle temperature of 766.1 K (493 °C) and a distillation temperature of 343.1 K (70 °C) the yellow vapour reached the distillation cooler. At a distillation temperature of 359.1 K (86 °C) the decomposed test substance started to distil. The distillation stopped at a distillation temperature of 368.1 K (95 °C). The amount of distillate (dark brown viscous liquid) was 0.34 g. The amount of the residue (black coloured burned crispy-like substance) was 2.46 g, i.e. 86 % of the test substance amount remained in the distillation flask.

Conclusions:

The boiling temperature could not be determined. The test substance decomposed at a distillation temperature of 368.1 K (95 °C).

Description of key information

Decomposes above approximately 306ºC without boiling (EU A.2; distillation method).

Additional information

The boiling temperature could not be determined. Decomposition started at approximately 306 °C.