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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009-2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study (OECD 102). Not GLP.
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
thermal analysis
Remarks:
Differential Scanning calorimetry
Test material information:
Composition 1
Key result
Melting / freezing pt.:
65.7 °C
Remarks on result:
other: batch 15022309994
Key result
Melting / freezing pt.:
66.2
Remarks on result:
other: batch 16092303386
Key result
Melting / freezing pt.:
66.4 °C
Remarks on result:
other: batch 16092303420
Key result
Melting / freezing pt.:
66.1 °C
Remarks on result:
other: batch 16092303453
Key result
Melting / freezing pt.:
66.3 °C
Remarks on result:
other: batch 170122304341
Key result
Melting / freezing pt.:
65.9 °C
Remarks on result:
other: batch 170122304342
Key result
Melting / freezing pt.:
65.39 °C
Remarks on result:
other: statistical value from 1/1/2008 till 1/04/2018 on 77 samples
Key result
Melting / freezing pt.:
>= 63 - <= 67 °C
Remarks on result:
other: sales specification
Conclusions:
The melting point of DBTU (1,3-dibutyl-2-thiourea) is determined to be about 63-67 °C
Executive summary:

A study was performed according to OECD Test guiede 10 in order to investigate the melting point of the test substance DBTU (1,3 -dibutyl-2 -thiourea). The melting point of DBTU is determined to be about 65.3°C on average (statiscals values), specifications are 63 -67°C.

Description of key information

Key informations gathers from different sources are summarized below:

  • According to 5 publications in ACS, melting point of 1,3-dibutyl-2-thiourea is in the range: 61-71°C.
  •   According to 10 references in REAXSYS, melting point of DBTU is in the range 62-65.5°C
  •   According to the database Chemis-Grundbestand - BGVV/CHEMIS (available on website http://en.gsbl.de/gsblweb30/changeView.do?viewname=ALLE_MERKMAL), DBTU is a crystalline product white to yellow/brown having a melting point of about 63°C
  •   According to 3 reference on REASYS, melting point of DBTU is in the range 61-86°C
  •  According to 10 publication in REGISTERY, melting point of DBTU is about 61-71°C. 

A study was performed according to OECD Test guide 10 in order to investigate the melting point of the test substance DBTU (1,3 -dibutyl-2 -thiourea). The melting point of DBTU is determined to be about 65.3°C on average (statistically values), specifications are 63 -67°C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
65 °C

Additional information

Melting point of DBTU (1,3-dibutyl-2-thiourea) is about 65°C (range 63 -67°C)