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Physical & Chemical properties

Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
March – April, 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
conducted under GLP conditions
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
method according to Siwoloboff
Boiling pt.:
578 K
Atm. press.:
101.325 kPa
Key result
Boiling pt.:
305 °C
Atm. press.:
101.325 kPa

The accuracy of the instrument was checked by determining the melting point of a certified sample of benzoic acid (certified melting point: 122.5°C±0.3°C). 

The results were: 

First determination: 122.8°C

Second determination: 122.7°C

Boiling point determination:

First determination:             observed boiling point: 303.4°C

Second determination:      observed boiling point: 302.6°C

Correction to normalized pressure:

The atmospheric pressure at the time of the experiment was 97.06 kPa (Meteo Suisse). A correction of the temperature to normalised pressure (101.325 kPa) was made. The determination of this correction factor was made using the Sidney Young equation, as recommended in OECD guideline 103: 

Tn= T + (fT·Δp) 

Where:          Δp = 101.325 kPa – p

         p = pressure in kPa; the pressure was obtained from the Swiss meteorological service for the time of the experiment;

fT = rate of change of boiling temperature with pressure in K/kPa, here a value of 0.47 K/kPa.

                      T = temperature in K

                      Tn= normal boiling point

With this correction made, it can be concluded that the standard boiling point of

GR-87-7596 is (values rounded off): 578 K (305°C)

Conclusions:
From the tests described above, it can be concluded that the standard boiling point of GR-87-7596 is (values rounded off):
578 K (305°C)
Executive summary:

The boiling point of GR-87-7596 was measured according to OECD Guideline No. 103 (principle according to Siwoloboff). The result can be expressed as follows (values rounded off):

 

The boiling point of GR-87-7596: 578 K (305°C)

Description of key information

The boiling point of GR-87-7596 was measured according to OECD Guideline No. 103 (principle according to Siwoloboff). The result can be expressed as follows (values rounded off):

 

The boiling point of GR-87-7596: 578 K (305°C)

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
305 °C

Additional information