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Physical & Chemical properties

Melting point / freezing point

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Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2000
Report date:
2000

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
GLP compliance:
yes
Type of method:
differential scanning calorimetry

Test material

Constituent 1
Chemical structure
Reference substance name:
Ammonium 2-amino-4-(hydroxymethylphosphinyl)butyrate
EC Number:
278-636-5
EC Name:
Ammonium 2-amino-4-(hydroxymethylphosphinyl)butyrate
Cas Number:
77182-82-2
Molecular formula:
C5H12NO4P.H3N
IUPAC Name:
ammonium 2-amino-4-(hydroxymethylphosphinyl)butyrate
Test material form:
solid: crystalline

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
>= 215 - <= 218 °C
Atm. press.:
1 013 hPa
Decomp. temp.:
>= 217 °C

Any other information on results incl. tables

Results

Thermal stability

The measurement in the closed glass pan shows an endothermal effect (melting) beginning at 180 °C, followed by a decomposition of the test substance in the range 245-305 °C, with a

decomposition energy of 190 J/g, and a small exothermal effect in the range 370-470 °C, with a decomposition energy of 78 J/g.

Melting temperatures

The determinations of melting / boiling point by DSC, Mettler-Toledo TA8000, were carried out in aluminium pans with a hole.

In aluminium pans, the diagrams show the endothermal effect (melting) is in the range 160-260 °C, with an onset of 217 °C followed by a decomposition of the test substance.

Ident-No.

onset / °C

Temperature range / °C

Pan

8040

215.2

160 - 260

Aluminium with a hole

8041

217.5

170 – 255

Aluminium with a hole

8051

218.2

165 – 255

Aluminium with a hole

Melting range is: 215-218 °C.

Applicant's summary and conclusion