Sodium bis[2,4-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)]chromate(1-)

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From March 16 to 18, 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Qualifier:

according to guideline

Guideline:

other: OECD Guideline 103 (Boiling point)

Principles of method if other than guideline:

Test was performed according to the SOP - SRT 028 protocol.

GLP compliance:

no

Type of method:

differential scanning calorimetry

Melting / freezing pt.:

> 110 - < 157 °C

Decomposition:

yes

Decomp. temp.:

> 246 °C

Initial weight of sample: 4.7210 mg

Final weight after DSC: 2.5950 mg

Melting between 110 and 157 °C, followed by decomposition starting at ca. 246 °C.

Conclusions:

The substance melts between 110 and 157 °C (onset at 126.8 °C and enthalpy -32.3 J/g).

Executive summary:

Method

The melting point was determined using the Differential Scanning Calorimetry (DSC) according to the OECD guidelines 102 and 103.

Results

Melting of the substance occurs between 110 and 157 °C, followed by decomposition starting at ca. 246 °C.

Description of key information

Melting of the sample between 110 and 157 °C, with onset at 126.8 °C and enthalpy of -32.3 J/g.

Sample decomposition starting at ca. 246 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

126.8 °C

Additional information

Thermal analysis based on Differential Scanning Calorimetry.