Tetrachloro-p-benzoquinone

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2010

Reliability:

1 (reliable without restriction)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Guideline:

other: Differential Scanning Calorimetry

Deviations:

not applicable

Principles of method if other than guideline:

determination of decomposition: DSC, 25-450 °C, 3 K/min, sealed glass vial in air
determination of sublimation: TGA, 25-1100 °C, 25 K/min, air and nitrogen

GLP compliance:

not specified

Type of method:

thermal analysis

Test material

Test material information

Constituent 1

Reference substance name:

Tetrachloro-p-benzoquinone

EC Number:

204-274-4

EC Name:

Tetrachloro-p-benzoquinone

Cas Number:

118-75-2

Molecular formula:

C6Cl4O2

IUPAC Name:

2,3,5,6-tetrachloro-1,4-benzoquinone

Results and discussion

Melting / freezing point

Melting / freezing pt.:

290 °C

Atm. press.:

ca. 1 atm

Decomposition:

yes

Remarks:

(sealed glass vial in air)

Decomp. temp.:

>= 374 °C

Sublimation:

yes

Remarks:

(thermogravimetric analysis, TGA)

Subl. temp.:

25 - 200 °C

Remarks on result:

other: weight loss in TGA, air -0.4% (w/w) between 25 and 200 °C

Applicant's summary and conclusion

Conclusions:

Melting point: 290°C (Method DSC, sealed glass vial in air)
Decomposition started at 374°C (Method DSC, sealed glass vial in air).

Executive summary:

Melting point and thermal decomposition of Chloranil (2,3,5,6-tetrachloro-1,4-benzoquinone) were determined by Differential Scanning Calorimetry (DSC). The melting point was found to be 290°C. Exothermic decomposition started at 374°C in sealed glass vials in air.