N-Phenyl-diethanolamine, reaction products with formaldehyde

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

30 March 2020 to 29 April 2020

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:

2016

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Version / remarks:

1995

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

Date of Inspection: 10-17 December 2019; Date of Signature on Certificate: 24 February 2020

Type of method:

differential scanning calorimetry

Key result

Decomposition:

ambiguous

Remarks:

reaction/and or decomposition occurs

Decomp. temp.:

>= 175 °C

Remarks on result:

not determinable

Preliminary Test

Starting from 250°C, the weight of the sample decreased significantly. At 282°C, the sample weight had decreased by 25%.

After the experiment, a dark brown molten residue remained in the sample container (original colour: light orange). The change of the colour indicated reaction and/or decomposition of the test item.

 

Main Test

In Experiment 1, between 50°C and 175°C a broad endothermic effect was observed  followed by an exothermic then another endothermic effect. The first endothermic effect is most likely obtained due to the evaporation of minor constituents. This endothermic event is not considered to reflect the boiling temperature of the test item as it is not a sharp peak and further exothermic and endothermic effects followed the first one. The exothermic effect and second endothermic effect were likely obtained due to the reaction and/or decomposition of the test item. 

After the experiment, a dark brown molten residue remained in the sample container (original colour: light orange). The change of the colour indicated reaction and/or decomposition of the test item.

Conclusions:

Reaction and/or decomposition of the test item was observed starting at 175°C (448K). Boiling of the test item was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test item has no boiling temperature

Executive summary:

The boiling temperature was investigated using differential scanning calorimetry (DSC) in accordance with OECD Guideline 103 (1995) and EC Guideline A2 (2016). Reaction and/or decomposition of the test item was observed starting at 175°C (448K). Boiling of the test item was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test item has no boiling temperature

Description of key information

Reaction and/or decomposition from 175°C (448K); OECD 103; Jovic Madzarevic, Z. (2020)

Key value for chemical safety assessment

Temperature of decomposition (state purity):

175 °C

Additional information

No boiling of the test item was observed below the temperature at which reaction and/or decomposition started. Therefore a decomposition temperature was used as the key value for chemical safety assessment.