4,4'-Isopropylidenediphenol, ethoxylated

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

dynamic method

Decomposition:

yes

Decomp. temp.:

> 345 °C

Temperature (°C)	Vapour Pressure (hPa)
	Measurement	Calculation
248.05	0.51	0.510
255.18	0.72	0.719
262.59	1.02	1.017
278.24	2.04	2.063
287.13	3.03	3.035
299.04	5.02	5.010
307.15	7.03	6.976
316.25	10.03	10.017
334.76	20.19	20.308
345.46	30.07	30.040

At a pressure of 50 hPa an instable temperature was observed. Caused by a limited stability and a thermal change of the test item a definite vapour pressure could not be determined. The extrapolation from the range of the measurement at 30 hPa to the normal boiling temperature at 1013.25 hPa is not feasible, reliable data cannot be extrapolated. Therefore, the normal boiling temperature could not be determined.

Conclusions:

A normal boiling temperature could not be determined as it was not feasible to extrapolate from the range of the measurement at 30 hPa to the normal boiling temperature at 1013.25 hPa, due to observation of unstable temperatures at 50 hPa and a thermal change of the test item. Decomposition of the test item was observed at >345°C.

Executive summary:

The boiling point of the test substance was determined in accordance with the OECD Guideline for Testing of Chemicals 103. The boiling point was measured by the dynamic vapour pressure method. A normal boiling temperature could not be determined due to unstable temperatures and a thermal change of the test item preventing reliable extrapolation from the range of the measurement at 30 hPa. A decomposition was observed at >345°C.

Description of key information

 A normal boiling point temperature could not be determined. Decomposition of the test substance was observed at a temperature ≥ 280°C ≤ 350°C. 

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

350 °C

Additional information

Two studies were conducted to assess the boiling point of the test substance. Both studies were considered reliable as they were conducted on the registered substance according to OECD Testing Guideline 102. A normal boiling point could not be determined due to decomposition of the test substance. In the supporting study, unstable temperatures and a thermal change in the test substance prevented reliable extrapolation from the temperature range of the measurement at 30 hPa to the normal boiling temperature at 1013.25 hPa. A decomposition was recorded at >345°C. In the key study, thermal decomposition of the test substance was recorded at a temperature of ≥ 280°C ≤ 350°C.