Registration Dossier

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2013-01-15
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2013
Report Date:
2013

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
similar to Kofler hot bar
Deviations:
yes
Remarks:
: hot bar PROLABO, temperature is homogenous on the hot bar
Principles of method if other than guideline:
Technic similar to the Kofler Hot bar.
Apparatus PROLABO, temperature is homegenous at every point of the hot bar
GLP compliance:
no
Type of method:
other: similar to Kofler hot stage

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder

Results and discussion

Melting / freezing point
Key result
Atm. press.:
1 013 hPa
Decomposition:
yes
Decomp. temp.:
>= 200 °C
Remarks on result:
other: The test item shows no melting point. No liquid phase at no point but a softening phase from 180°C, and start decomposing > 200°C.

Any other information on results incl. tables

Calibration of the hot bar Prolabo: A dividing line is observed and a fluid phase is appearing. We observed a temperature lag between the theoretical melting and the measured one, but the order of magnitude is correct.

 

Solvent Black 46: With the increase temperature, the test item became bright and soft. At no point a liquid appears : no melting.

 

Product

Testo's T°C at which the product becomes sticky

Measured Testo's T°C of the « apparent melting »

Corrected T°C according the « standard »

Remarks

Potassium thiocyanate

Theoretical MP = 173 °C

 

174°C

176°C

Around 170°C the correction is estimated at -3°C

Ammonium dihydrogen phosphate

Theoretical MP= 190 °C

A 194°C, crystals becomes colorless

200°C

Around 200°C the correction is estimated at -10°C

Melting point difficult to measured

Solvent Black 46

157°C

180°C

Around 175°C

219°C : white smoke

280°C : carbonization

300°C : test stopped

Applicant's summary and conclusion

Conclusions:
Under normal conditions of pressure, Solvent Black 46 has no melting point. It became bright and soft at 175-180°C with no liquid phase. The assay was stopped after reaching 300°C with the hot bar. The test material seems to decompose around 200 °C.
Executive summary:

Under normal conditions of pressure, Solvent Black 46 has no melting point. It became bright and soft at 175-180°C with no liquid phase. The assay was stopped after reaching 300°C with the hot bar. The test material seems to decompose around 200 °C.