Tetrabutyltin

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

30 June 2004 to 21 August 2004

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Remarks:

As the material decomposed, no value for boiling point could be determined. The result is estimated from vapour pressure data.

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

470 K

Atm. press.:

101.325 kPa

Decomposition:

yes

Decomp. temp.:

436 K

Remarks on result:

other: As the material decomposed, no value for boiling point could be determined. The result is estimated from vapour pressure data.

Thermograms and thermographic data for Determinations 1 and 2 are shown in the attached figures.

Overall decomposition temperature: from approximately 436 ± 0.5 K

As the test material decomposed, no value for the boiling temperature could be determined. From data obtained in the key vapour pressure study, the boiling point of the test material was estimated to be 470 K at 101.325 kPa.

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

Table 2: Thermographic Data Determination 1

Thermal Event	Interpretation	Temperature
		°C	K
Approximate onset of exotherm	Approximate onset of decomposition	169.1	442
Extrapolated onset of exotherm	Extrapolated onset of decomposition	193.2	466
Exotherm peak temperature	-	272.4	546

Atmospheric pressure: 100.57 kPa

 

Table 3: Thermographic Data, Determination 2

Thermal Event	Interpretation	Temperature
		°C	K
Approximate onset of exotherm	Approximate onset of decomposition	163.2	436
Extrapolated onset of exotherm	Extrapolated onset of decomposition	192.0	465
Exotherm peak temperature	-	262.7	536

Atmospheric pressure: 100.57 kPa

Conclusions:

From vapour pressure data, the boiling point was estimated to be 470 K at 101.325.kPa.

Executive summary:

The test material decomposed from approximately 436 ± 0.5 K at 101.57 kPa, by differential scanning calorimetry, using ASTM E537-86, Method 103 of the OECD Guidelines for Testing of Chemicals, 27, July 1995. As a result of the low inital rate of enthalpy change during decomposition, the onset temperature could only be approximated. As the test material decomposed, no value for boiling point could be determined. The test material has been determined to decompose from approximately 436 ± 0.5 K at 100.57 kPa. From vapour pressure data, the boiling point was estimated to be 470 K at 101.325.kPa.

Description of key information

The key study was chosen on the basis that it was conducted to a recognised guideline and GLP and is therefore the most reliable data. From vapour pressure data, the boiling point was estimated to be 470 K at 101.325 kPa.

The test material has been determined to decompose from approximately 436 ± 0.5 K at 100.57 kPa.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

470 K

Additional information

The key study was chosen on the basis that it was conducted to a recognised guideline and GLP and is therefore the most reliable data.

The test material decomposed from approximately 436 ± 0.5 K at 101.57 kPa, by differential scanning calorimetry, using ASTM E537-86, Method 103 of the OECD Guidelines for Testing of Chemicals, 27, July 1995. As a result of the low inital rate of enthalpy change during decomposition, the onset temperature could only be approximated. As the test material decomposed, no value for boiling point could be determined. The test material has been determined to decompose from approximately 436 ± 0.5 K at 100.57 kPa. From vapour pressure data, the boiling point was estimated to be 470 K at 101.325 kPa.

Supporting studies from the SRC corporation and Merck MSDS are available; the boiling points for these are 127 - 145 °C at 10 mm Hg and 140 degrees C at 10 hPa, respectively.