N-ethylpyridazin-4-amine

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2019

Report date:

2019

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Principles of method if other than guideline:

DIN EN ISO 11357-3

GLP compliance:

no

Type of method:

differential scanning calorimetry

Test material

Test material information

Constituent 1

Reference substance name:

N-ethylpyridazin-4-amine

EC Number:

846-827-8

Cas Number:

1521274-68-9

Molecular formula:

C6H9N3

IUPAC Name:

N-ethylpyridazin-4-amine

Test material form:

solid: particulate/powder

Results and discussion

Melting / freezing point

Key result

Melting / freezing pt.:

124.6 °C

Atm. press.:

1 013 hPa

Any other information on results incl. tables

Result:

Sample	Tm1 [°C]	Tk* [°C]	∆m [%]
4-Pyridazinamine, N-ethyl-	124.6	110.3	1

Explanations

Tm₁= melting peak temperature in delivery condition

Tk* = crystallisation temperature

∆m = weight loss, determined at the end of the measurement, based on initial weight

Due to the rounded inlet, an evaluation of the onset temperature does not make sense.
In a first measurement up to 140 ° C showed a strong thermal degradation of the sample with a
Weight loss of about 69%, so for the present measurement a maximum temperature
was chosen just above the melting peak.
* In principle, with a crystalline substance directly below the melting peak, under unfavorable conditions (eg formation of crystallisation germs by soiling, shocks, pressure fluctuations), a spontaneous crystallization can be expected.Under laboratory conditions, a strong hypothermia is often detectable.The sample crystallizes so fast that the heat generated by the crystallization can not be dissipated by the device in the short time, which leads to a "looping" in the course of the curve.In this case, the crystallization peak is to be equated with the beginning of the crystallization.