bis(diethylamino)-N,N-diethylmethaniminium chloride

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

March 25, 2003 – November 14, 2003

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

GLP compliance:

yes

Remarks:

OECD GLP

Type of method:

ebulliometer

Key result

Atm. press.:

101.7 kPa

Decomposition:

yes

Decomp. temp.:

278 °C

The duplicate test material heating curves showed plateaus at 276 °C (run 1) and 280 °C (run 2) at 101.7 kPa, for an average of 278 ± 2 °C at 101.7 kPa. Although test material was observed to apparently boil at this temperature, this substance was not expected to boil given that it was a salt, and that thermal degradation with the loss of ethylene and HCl. Therefore, thermal degradation of test material was investigated by collecting the condensate on the wall of the test material test tube.

Analysis of the condensate (as collected on the wall of the test material test tube) showed a peak at 4.48 min with a mass spectrum that was consistent with this peak being the thermal degradation product pentaethylguanidine. In addition, when a solution of the test material in water (1 mg/mL) was injected into the GC-MS instrument, using an injection port temperature of 300 °C, a major peak with a similar retention time (4.46 min) and mass spectrum were observed. These results supported the contention that the test material did not boil, but, rather, thermally degraded at the average plateau temperature of 278 °C.

Conclusions:

Under the conditions of this study, the test material did not exhibit a boiling point, it decomposed at 278 °C and 101.7 kPa to give pentaethylguanidine, ethylene, and HCl.

Executive summary:

The boiling point of the test material was investigated in accordance with the standardised guidelines OECD 103, under GLP conditions, using the ebulliometer method. 

Under the conditions of this study, the test material did not exhibit a boiling point, it decomposed at 278 °C and 101.7 kPa to give pentaethylguanidine, ethylene, and HCl.

Description of key information

Under the conditions of this study, the test material did not exhibit a boiling point, it decomposed at 278 °C and 101.7 kPa to give pentaethylguanidine, ethylene, and HCl.

Key value for chemical safety assessment

Temperature of decomposition (state purity):

278 °C

Additional information

The boiling point of the test material was investigated in accordance with the standardised guidelines OECD 103, under GLP conditions, using the ebulliometer method. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

Under the conditions of this study, the test material did not exhibit a boiling point, it decomposed at 278 °C and 101.7 kPa to give pentaethylguanidine, ethylene, and HCl.