Registration Dossier

Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

A number of melting point values are given ranging from 42 degrees C to 45 degrees C. 

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
45 °C

Additional information

Four references are presented which give seven melting point values in total - the SIDS document presents four values. The results are summarised in the table below :-

Source  Melting Point / °C

 Reference

CRC Handbook of Chemistry and Physics 45  CRC Handbook
Sigmal Aldrich library of chemical safety data.  >= 42 — <= 43  Sigmal Aldrich library of safety data
 International Program on Chemical Safety  45  Chemical Safety Information from Intergovernmental Organisations
OECD SIDS Initial Assessment Report    >= 42 — <= 43  SIDS
OECD SIDS Initial Assessment Report  ca 45  SIDS
OECD SIDS Initial Assessment Report  ca 45  SIDS
OECD SIDS Initial Assessment Report    >= 43 — <= 45  SIDS

The values reported are in broad agreement in that 2,4 -Dichlorophenol has a melting point ranging from 42 degrees C to 45 degrees C. Those reported values with the higher validity scores assigned are to the higher melting point value of 45 degrees C. The purity of the substance in most cases is not given although the lower melting point values suggest a slightly more impure sample.

In addition, the melting point of 2,4 -dichlorophenol is reported to be 45 degrees C from the "Chlorophenols Community Right to Know List"

Several of the more reliable sources quote 45°C. Since this is the highest value presented it represents the most pure material. Therefore, it is concluded that the melting point of 2,4 -Dichlorophenol is 45°C.