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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Testing was conducted between 17 December 2008 and 27 January 2009.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do no affect the quality of relevant results.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2009
Report date:
2009

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
UK GLP standards (Schedule 1, Good Laboratory Practice Regulations 1999 (SI 1999/3106 as amended by SI 2004/0994)). Date of inspection: 21/08/2008. Date of signature: 04/03/2009/
Type of method:
method to determine freezing temperature
Remarks:
Differential Scanning Calorimetry (DSC)

Test material

Constituent 1
Chemical structure
Reference substance name:
4,4'-bis(methoxymethyl)-1,1'-biphenyl
EC Number:
700-008-0
Cas Number:
3753-18-2
Molecular formula:
C16 H18 O2
IUPAC Name:
4,4'-bis(methoxymethyl)-1,1'-biphenyl
Constituent 2
Reference substance name:
4,4-bis(methoxymethyl)-biphenyl
IUPAC Name:
4,4-bis(methoxymethyl)-biphenyl

Results and discussion

Melting / freezing point
Melting / freezing pt.:
325 K
Decomposition:
no
Sublimation:
no

Any other information on results incl. tables

Results

Thermographic data for Determinations 1 and 2 are shown in the following tables respectively.

Table4.2      Thermographic Data – Determination 1

Thermal Event

Interpretation

Temperature

ºC

K

Endotherm

Loss of volatiles

32.34

305

Endotherm

Onset of melting

51.79

325


Table4.3     Thermographic Data – Determination 2

Thermal Event

Interpretation

Temperature

ºC

K

Endotherm

Loss of volatiles

31.41

305

Endotherm

Onset of melting

51.48

325

 

Mean melting temperature: 325 ± 0.5 K

Two endotherms were observed in the DSC thermograms; one at approximately 32°C and one at approximately 52°C. To identify the events occurring at these temperatures, a visual determination using a metal block apparatus was performed. This showed no change in the test material up to 51°C at which point the test material was observed to liquefy. A further DSC test was performed but was then also cooled to ambient before repeating the temperature program. The earlier endotherm present at approximately 32°C was not evident when the sample was reheated. This demonstrated that this endotherm may be due to the loss of volatile components.

Applicant's summary and conclusion

Conclusions:
The melting temperature of the test material has been determined to be 325 ± 0.5 K.
Executive summary:

The determination was carried out by differential scanning calorimetry (DSC) using the procedure specified in ASTM E537-86, Method A1 Melting/Freezing Temperature of Council Regulation (EC) No 440/2008 of 30 May 2008.

The melting temperature of the test material has been determined to be 325 ± 0.5 K.