Registration Dossier
Registration Dossier
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EC number: 500-011-5 | CAS number: 9003-80-9
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing 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 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 51 °C
- Decomposition:
- no
- Sublimation:
- no
- Conclusions:
- The glass transition of Formaldehyde, oligomeric reaction products with acetone and diphenylamine was determined at 51°C (324K) by using DSC.
- 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.1: “Melting/Freezing 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. 102: "Melting Point / Melting Range", July 27, 1995.
United States Environmental Protection Agency (EPA), Product Properties Test Guidelines no. OPPTS 830.7200: "Melting Point/Melting Range", March 1998.
The melting 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 (if any) of the test item is evaluated from the DSC curve as the extrapolated onset temperature of the endothermic melting or evaporation peak.
The glass transition of Formaldehyde, oligomeric reaction products with acetone and diphenylamine was determined at 51°C (324K) by using DSC.
Reference
Main study
A glass transition (Tg) of the test substance was observed between 25°C and 100°C. T The inflection point of the peak could not be determined since it was observed within 2 minutes from the start of the experiment.
A repeated heating cycle was applied in the Experiment 2. The experiment also started at a lower temperature in order to determine the inflection point of the glass transition. With the first heating the inflection point of the glass transition was 51.18°C.
During cooling a glass transition was observed between 40°C and 0°C.
With the second heating an inflection point of 50.21°C was obtained. The extrapolated onset was not used for calculation of the glass transition, since it was obtained by an glass transition of non-original test substance.
Experiment 3 was performed to determine the duplicate glass transition point of the test item.
The inflection point of the glass transition was 50.46°C.
The glass transition was determined as the average glass transition obtained from experiment 2 (51.18°C) and experiment 3 (50.46°C).
Description of key information
Key value determined in a GLP accredited laboratory study in accordance with OECD Guideline 102, EU Method A.1 and US EPA Procedure 830.7200.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 51 °C
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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