5-methoxy-N-propyl-1,2,3,4-tetrahydronaphthalen-2-aminium chloride

Boiling point

Administrative data

Endpoint:

boiling point

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is a solid which decomposes before boiling

Cross-reference

Reason / purpose for cross-reference:

data waiving: supporting information

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

05 Dec 2017 - 14 Dec 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

2016

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7200 (Melting Point / Melting Range)

Version / remarks:

1998

Deviations:

no

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

>= 262.6 - <= 265.3 °C

Decomposition:

yes

Remarks on result:

other: Decomposition started during melting.

TGA EXPERIMENT (PRELIMINARY TEST)

Starting at 275°C, the weight of the sample decreased slightly, yet up to 550°C a significant decrease in sample weight was not observed.

After the experiment, a black molten residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test item. 

DSC EXPERIMENT 1

An endothermic peak was observed between 250°C and 275°C directly followed by exothermic effects starting at 275°C. The extrapolated onset temperature of the endothermic peak was 265.268°C. The endothermic effect was most likely caused by melting of the test item. The exothermic effects were ascribed to reaction and/or decomposition of the test item. After the experiment, a black molten residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test item. Based on this visual observation, it was concluded that the test item had molten and that the change of the colour demonstrated reaction and/or decomposition of the test item.

DSC EXPERIMENT 2

In order to investigate the melting peak, in Experiment 2 heating was stopped directly after the melting peak. The extrapolated onset temperature was 262.559°C. After the experiment, an off-white/yellowish molten residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test item. It also demonstrated that melting was the reason for the endothermic effect.

DSC EXPERIMENT 3

Since the difference in extrapolated onsets between the first two experiments was > 1°C, Experiment 3 was performed using the same conditions as in Experiment 2. The extrapolated onset of the melting peak was 263.042°C. After the experiment, an off-white/yellowish molten residue remained in the sample container.

DATA HANDLING

Since reaction and/or decomposition was observed during melting of the test item, a relatively high difference between the extrapolated onsets was observed. Therefore a melting range was given instead of a melting temperature. The melting range was determined between the lowest and highest melting temperature of Experiment 1 (265.268°C), Experiment 2 (262.559°C) and Experiment 3 (263.042°C).

Conclusions:

The melting range of the substance was determined to be 262.6-265.3°C.

Executive summary:

Differential Scanning Calorimetry (DSC) experiments were performed in a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200.

A melting range instead of a well defined melting temperature was determined. The melting range of the substance was determined to be 262.6-265.3°C.

Reaction and/or decomposition of the substance started during melting.