Formaldehyde, oligomeric reaction products with acetone and diphenylamine

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

07 September 2015 to 10 December 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7220 (Boiling Point / Boiling Range)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Remarks on result:

not determinable

Preliminary test

From 325°C upwards the weight of the sample decreased significantly. At 385°C the sample weight had decreased by 25%.

After the experiment, a black molten residue remained in the sample container (original colour: dark brown). Residue was observed on the lid of the sample container. The change of the colour indicated reaction and/or decomposition of the test item.

 

Main study

An exothermic peak followed by an endothermic was observed from 300°C. The effect was due to reaction and/or decomposition of the test substance. After the experiment, a black residue remained in the sample container.

A repeated heating cycle was applied in the Experiment 2. After the experiment, a black molten residue remained in the sample container.

Experiment 3 was performed to determine the duplicate glass transition point of the test item. After the experiment, a black molten residue remained in the sample container.

 

Reaction and/or decomposition of Formaldehyde, oligomeric reaction products with acetone and diphenylamine was observed during DSC experiments at temperatures of > 300°C (> 573K).

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.

Conclusions:

Reaction and/or decomposition of Formaldehyde, oligomeric reaction products with acetone and diphenylamine was observed during DSC experiments at temperatures of > 300°C (> 573K).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 purpose of the study was to determine the physico-chemical properties for Formaldehyde, oligomeric reaction products with acetone and diphenylamine.

 

The study was performed to the following guidelines, in compliance with GLP:

European Community (EC), EC no. 440/2008, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.2: “Boiling Temperature”, Official Journal of the European Union no. L142, May 31, 2008.

Organization for Economic Co-operation and Development (OECD), OECD Guidelines for the Testing of Chemicals no. 103: "Boiling Point", July 27, 1995.

United States Environmental Protection Agency (EPA), Product Properties Test Guidelines no. OPPTS 830.7220: "Boiling Point/Boiling Range", August 1996.

 

Performance of the test

The boiling temperature of the test item was determined using differential scanning calorimetry (DSC). This technique records the difference in heat flow of two crucibles, one filled with test item and the other left empty as reference, while these crucibles are subjected to a controlled temperature programme. A transition of the test item, such as melting or evaporation, is indicated by a deviation from the base line in the heat flow record. Because melting and evaporation are processes in which heat is consumed, the deviation from the base line is in the endothermic direction for these processes. The melting temperature or boiling temperature (if any) of the test item is evaluated from the DSC curve as the extrapolated onset temperature of the endothermic melting or evaporation peak.

As a safety precaution for the DSC cell a preliminary test was performed using a thermogravimetric analyzer (TGA).

 

Reaction and/or decomposition of Formaldehyde, oligomeric reaction products with acetone and diphenylamine was observed during DSC experiments at temperatures of > 300°C (> 573K).

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

The study was performed in an GLP accredited laboratory study in accordance with OECD Guideline 103, EU Method A.2 and US EPA Procedure 830.7220.

Reaction and/or decomposition of Formaldehyde, oligomeric reaction products with acetone and diphenylamine was observed during DSC experiments at temperatures of > 300°C (> 573K).

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.