Phenylacetaldehyde

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

27-Jan to 29-Mar-2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7220 (Boiling Point / Boiling Range)

GLP compliance:

no

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

> 187 - < 188 °C

Atm. press.:

1 013 hPa

Results

The thermograms of the DSC runs PN10412 and PN10436 show in the temperature range of 100 – 180 °C an exothermic effect was observed with an energy of approx. -90 J/g directly followed by an endothermic effect (boiling) in the temperature range of 180 – 250 °C. In the temperature range of 250 – 420 °C a further exothermic effect could be detected with an energy of approx. -160 J/g.

Results of the DSC measurements

No.	Sample weight (mg)	Onset of effect (°C)	Range of effect (°C)	Weight loss (mg)	Atmospheric pressure (hPa)
PN10412	16.02	187.41	100 to 180 (exo) 180 to 250 (endo) 250 to 420 (exo)	0.16	1006.4
PN10436	14.73	186.62	100 to 180 (exo) 180 to 250 (endo) 250 to 410 (exo)	14.40	1014.4

 

During the heating phase an endothermic effect (boiling) in the temperature range of 180 – 250 °C was observed. In the temperature range of 250 – 420 °C a further exothermic effect could be detected.

For the correction of the boiling temperature to standard pressure the test item was assigned to chemical group 3 (e.g. Aldehyde). A correction value φ = 5.15 was used for the temperature of 180 - 190 °C.

The lowest measured onset temperature is corrected to the standard pressure to be 186.57 °C and the highest onset temperature to be 187.67 °C. As the corrected onset temperatures in both tests deviate by less than 0.5 K from their mean value of 187.12 °C, the test item has a boiling point of 187 - 188 °C.

The verification of the exothermic effect in the DSC (100 – 180 °C) with the capillary method showed that the test item was unchanged until the boiling of the test item at approx. 190 °C.

Final Results

The test item has a boiling point of 187 - 188 °C corrected to normal atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.2. and OECD Test Guideline 103 (1995). 

Conclusions:

A boiling point of 187 - 188 °C (at 1013 hPa) was determined for the test substance according to E.U. Method A.2.

Description of key information

Boiling point: 187 - 188 °C at 1013 hPa (EU Method A.2., differential scanning calorimetry)