Phosphonium, tetraphenyl-, salt with 4,4'-sulfonylbis[phenol], compd. with 4,4'-sulfonylbis[phenol] (2:2:1)

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Testing was conducted between 17 October 2003 and 03 November 2003.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

not specified

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

Sponsor's identification SBCAT-03
Description white powder
Lot number UK030622B
Date received 09 October 2003
Storage conditions room temperature in the dark

Data relating to the identity, purity and stability of the test material are the responsibility of the
Sponsor.

The following compositional information was supplied by the Sponsor:

The test material is a mixture of 4,4'-sulfonylbisphenol, partially salted with tetraphenyl
phosphonium ions.

Key result

Boiling pt.:

> 633 K

Atm. press.:

>= 101.96 - 102.05 kPa

Decomposition:

yes

Decomp. temp.:

>= 548.5 - <= 549.5 K

Thermographic Data - Determination 1

 

Thermal Event	Interpretation	Temperature
		°C	K
Approximate onset of exotherm	Approximate onset of decomposition	275.8	549
Extrapolated onset of exotherm	Extrapolated onset of decomposition	344.1	617
Exotherm peak temperature	-	363.4	637

 

Atmospheric pressure: 102.05 kPa

 

Thermographic Data - Determination 2

 

Thermal Event	Interpretation	Temperature
		°C	K
Approximate onset of exotherm	Approximate onset of decomposition	296.3	569
Extrapolated onset of exotherm	Extrapolated onset of decomposition	347.8	621
Exotherm peak temperature	-	364.3	637

 

Atmospheric pressure: 101.96 k:Pa

 

Overall decomposition temperature: from approximately 549 ± 0.5 K

As the test material decomposed, no value for the boiling temperature could be determined experimentally. However, using an adaptation of the Stein and Brown method (Syracuse Research Corporation Inc. MPBP for Windows version 1.40, William Meylan, 1994-1999), the boiling temperature was calculated to be greater than 633 K for both the tetraphenyl phosphonium and 4,4' -sulfonylbisphenol components.

Discussion
As a result of the low rate of enthalpy change during decomposition, the onset temperature can only be approximated.

Conclusions:

The test material decomposed from approximately 549 ± 0.5 Kat 101.96 to 102.05 kPa. As the test material decomposed, no value for boiling temperature could be determined. A calculated value of boiling temperature gave a result of greater than 633 K.

Executive summary:

Boiling Temperature. The test material decomposed from approximately 549 ± 0.5 Kat 101.96 to 102.05 kPa, by differential scanning calorimetry, using ASTM E537-86, Method A2 of Commission Directive 92/69/EEC and Method 830.7220 of the OPPTS Guidelines. As the test material decomposed, no value for boiling temperature could be determined. A calculated value of boiling temperature gave a result greater than 633 K.

Description of key information

The test material decomposed from approximately 549 ± 0.5 Kat 101.96 to 102.05 kPa. As the test material decomposed, no value for boiling temperature could be determined. A calculated value of boiling temperature gave a result of greater than 633 K.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

633 K

Temperature of decomposition (state purity):

569 K