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Physical & Chemical properties

Boiling point

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Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
02 February 1999 to 22 June 1999
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
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
Type of method:
method according to Siwoloboff
Key result
Atm. press.:
1 026 mBar
Decomposition:
yes
Decomp. temp.:
ca. 240 °C
Remarks on result:
not determinable

Barometric pressure: 1026 mbar

As the temperature increased, the sample was observed to darken slightly at 240 °C and then turn an amber colour at 280 °C, indicating decomposition. No sign of boiling was noted.

Conclusions:
Under the conditions of the study, the boiling temperature of the test material was not determinable, as the test material decomposed at temperatures above 240 °C without boiling.
Executive summary:

The boiling point of the test material was assessed according to OECD test Guideline 103 and EU Method A.2. and in compliance with GLP using the Siwoloboff method.

A boiling tube (3.2 mm diameter) was filled with the sample and heated until liquid. A boiling capillary was then immersed, open end first.

Observations were then recorded as the temperature of the sample was raised.

As the temperature increased, the sample was observed to darken slightly at 240 °C and then turn an amber colour at 280 °C, indicating decomposition. No sign of boiling was noted.

Under the conditions of the study, the boiling temperature of the test material was not determinable, as the test material decomposed at temperatures above 240 °C without boiling.

Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
11 April 1990 to 20 August 1990
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
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: EPA FIFRA Subdivision D § 63-6
Deviations:
no
GLP compliance:
yes
Type of method:
other: Capillary tube method.
Key result
Boiling pt.:
>= 283 - <= 289 °C
Decomposition:
yes
Remarks:
As heating was continued beyond the melting point of the test material the clear, light brown liquid continually darkened in colour indicating decomposition.
Remarks on result:
other: Atmospheric pressure not specified.

As heating was continued beyond the melting point of the test material the clear, light brown liquid continually darkened in colour indicating decomposition.

Thus the boiling point was not determinable since the test material appears to decompose at temperatures above its melting point. It is possible to estimate the theoretical boiling point of the test material based on its structure. The method described by Meissner is based on the correlation of the normal boiling point with chemical type; molar refraction (RD) and parachor (P) are used as variables in the correlation:

 

Tb = (637[RD]^1.47 + BP) / [P]

 

Where:

B is a constant whose value depends upon the chemical type.

 

RD:

10 carbons = 10 (2.418) = 24.180

11 hydrogens = 11 (1.100) = 12.100

1 oxygen (hydroxyl) = 1 (1.525) = 1.525

1 oxygen (ether) = 1 (1.643) = 1.643

1 oxygen (carbonyl) 1 chlorine = 1 (2.211) = 2.211

1 chlorine = 1 (5967) = 5.967

1 six-membered ring = 1 (0) = 0

3 double bonds =3 (1.733) = 5.199

RD = 52.825

 

P (McGowan’s Method)

10 carbons = 10 (47.6) = 476.0

11 hydrogens = 11 (24.7) = 271.7

3 oxygens = 3 (36.2) = 108.6

1 chlorine = 1 (62.0) = 62.0

P = 918.3

 

The test material has 25 bonds in the compound

P = 918.3 – 25 (19)

= 443.3

 

P (Sugden’s Method)

10 carbons = 10 (9.2) = 92.0

10 hydrocarbons bonded to carbon = 10 (15.4) = 154.0

1 hydrogen bonded to oxygen = 1 (10.0) = 10.0

1 oxygen (hydroxyl) = 1 (20.0) = 20.0

1 oxygen (ether) = 1 (20) = 20.0

1 oxygen (carbonyl) = 1 (39.0) = 39.0

1 chloride = 1 (55.0) = (55.0)

1 six-membered ring = 1 (0.8) = 0.8

3 double bonds = 3 (19.0) = 57

Strains:

(RCOOH) = 1 (-3) = -3.0

(1-R3CCl) = 1 (-6.0) = -6.0

P = -438

 

B:

The test material has the following relative functional groups:

Monocarboxylic acid = 28 000

Ether = 4 000

Aromatic hydrocarbon = -2 500

B = -29 500

Tb was calculated to be 556 K (283 °C) using McGowan's [P] value, or 562 K (289 °C) using Sugden's [P] value.

Conclusions:
Under the conditions of the study the boiling point was calculated to be 556 K (283 °C) using McGowan's [P] value, or 562 K (289 °C) using Sugden's [P] value.
Executive summary:

The boiling point was assessed according to OECD Method 103 and in compliance with GLP using a capilliary method.

It was not possible to determine the boiling point using a capillary method, since the test material appears to decompose at temperatures above its melting point. Instead several calculation methods were used.

Under the conditions of the study the boiling point was calculated to be 556 K (283 °C) using McGowan's [P] value, or 562 K (289 °C) using Sugden's [P] value.

Endpoint:
boiling point
Remarks:
exothermic/endothermic effects
Type of information:
experimental study
Adequacy of study:
key study
Study period:
October - November 1994
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
no guideline followed
Principles of method if other than guideline:
The boiling point was investigated using differential scanning calorimetry.
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
ca. 280 °C
Remarks on result:
other: Atmospheric presure not specified.

A melting curve was registrated from 60 °C to 360 °C with a heating rate of 10K/min (sample weight = 3.48 mg).

At 280 ºC a strong exothermic effect is observed which is interpreted as decomposition.

There is no endothermic effect which is unrelated to the melting point. Therefore, sublimation or boiling of the test material can be excluded.

Conclusions:
Under the conditions of the study a strong exothermic effect is observed at 280 ºC which is interpreted as decomposition. There is no endothermic effect which is unrelated to the melting point. Therefore, sublimation or boiling of the test material can be excluded.
Executive summary:

The boiling point of the test material was assessed using Differential Scanning Calorimetry (DSC) in compliance with GLP.

A melting curve was registrated from 60 °C to 360 °C with a heating rate of 10K/min (sample weight = 3.48 mg).

Under the conditions of the study a strong exothermic effect is observed at 280 ºC which is interpreted as decomposition. There is no endothermic effect which is unrelated to the melting point. Therefore, sublimation or boiling of the test material can be excluded.

Description of key information

Comb (2000b)

Under the conditions of the study, the boiling temperature of the test material was not determinable, as the test material decomposed at temperatures above 240 °C without boiling.

O'Connor (1990)

Under the conditions of the study the boiling point was calculated to be 556 K (283 °C) using McGowan's [P] value, or 562 K (289 °C) using Sugden's [P] value.

Türk (1994)

Under the conditions of the study a strong exothermic effect is observed at 280 ºC which is interpreted as decomposition. There is no endothermic effect which is unrelated to the melting point. Therefore, sublimation or boiling of the test material can be excluded.

Key value for chemical safety assessment

Additional information

Comb (2000b)

The boiling point of the test material was assessed according to OECD test Guideline 103 and EU Method A.2. and in compliance with GLP using the Siwoloboff method. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

A boiling tube (3.2 mm diameter) was filled with the sample and heated until liquid. A boiling capillary was then immersed, open end first.

Observations were then recorded as the temperature of the sample was raised.

As the temperature increased, the sample was observed to darken slightly at 240 °C and then turn an amber colour at 280 °C, indicating decomposition. No sign of boiling was noted.

Under the conditions of the study, the boiling temperature of the test material was not determinable, as the test material decomposed at temperatures above 240 °C without boiling.

O'Connor (1990)

The boiling point was assessed according to OECD Method 103 and in compliance with GLP using a capilliary method. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

It was not possible to determine the boiling point using a capillary method, since the test material appears to decompose at temperatures above its melting point. Instead several calculation methods were used.

Under the conditions of the study the boiling point was calculated to be 556 K (283 °C) using McGowan's [P] value, or 562 K (289 °C) using Sugden's [P] value.

Türk (1994)

The boiling point of the test material was assessed using Differential Scanning Calorimetry (DSC) in compliance with GLP. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

A melting curve was registrated from 60 °C to 360 °C with a heating rate of 10K/min (sample weight = 3.48 mg).

Under the conditions of the study a strong exothermic effect is observed at 280 ºC which is interpreted as decomposition. There is no endothermic effect which is unrelated to the melting point. Therefore, sublimation or boiling of the test material can be excluded.