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Vapour pressure

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Endpoint:
vapour pressure
Type of information:
other: review article
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
secondary literature
Remarks:
The reference does not give sufficient experimental details and refers to secondary literature (highly credible review article)
Principles of method if other than guideline:
No data available
GLP compliance:
not specified
Type of method:
other: not reported
Temp.:
1 224 °C
Vapour pressure:
0.008 mm Hg
Remarks on result:
other: No further data available
Conclusions:
At 1224 °C the vapour pressure was recorded as 0.008 mm Hg.
Executive summary:

The vapour pressure of tin was noted to be 0.008 mm Hg at 1224 °C

Endpoint:
vapour pressure
Type of information:
other: handbook data
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Principles of method if other than guideline:
No data available
GLP compliance:
not specified
Type of method:
other: Not reported
Temp.:
1 224 °C
Vapour pressure:
1 Pa
Temp.:
1 384 °C
Vapour pressure:
10 Pa
Temp.:
1 582 °C
Vapour pressure:
100 Pa
Temp.:
1 834 °C
Vapour pressure:
1 kPa
Temp.:
2 165 °C
Vapour pressure:
10 kPa
Temp.:
2 620 °C
Vapour pressure:
100 kPa

Secondary reference: Stull D American Institute of Physics Handbook, Third Edition, Gray DE (Ed) McGraw Hill New York 1972.

Conclusions:
The vapour pressure of the substance was reported to be 1 Pa at 1224 °C to 100 kPa at 2620 °C.
Executive summary:

The vapour pressure of tin was noted to be 1 Pa at 1224 °C to 100 kPa at 2620 °C

Endpoint:
vapour pressure
Type of information:
other: review article
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
secondary literature
Remarks:
The reference does not give sufficient experimental details and refers to secondary literature
Principles of method if other than guideline:
No data available
GLP compliance:
not specified
Type of method:
other: not reported
Temp.:
991 °C
Vapour pressure:
0 mm Hg
Remarks on result:
other: For further values from this source, please see below.

Table 1: Vapour pressures of tin

Temperature (°C)

Vapour Pressure (mmHg)

Reference

991

0.5 x 10 -4

Harteck

1010

10 -3

Johnson

1076

2.1 x 10-4

Harteck

1127

6.5 x 10-4

Harteck

1130

10-2

Johnson

1161

8.5 x 10-4

Harteck

1270

10-1

Johnson

1440

1

1660

10

1850

50

1940

100

1970

99

Greenwood

2005

126

Ruff and Mugdan

2045

178

2100

266

Greenwood

2160

372

Ruff and Mugdan

2190

485

2195

502

2260

760

Johnson

2270

760

Greenwood

2270

755

Ruff and Mugdan

 

Harteck; Z physik Chem 134, 1 (1928)

Johnson; J Ind Eng Chem 9, 873 (1917)

Greewnwood; Proc Roy soc (London) 82A, 396 1909; 83A, 483 (1910)

Ruff and Mugdan; Z anorg allgem Chemie, 117, 147 (1921)

Conclusions:
The vapour pressure of the substance was recorded at 0.5 x 10E-4 mm Hg at 991 °C to 760 mm Hg at 2270 °C.
Executive summary:

The vapour pressure of tin was noted to be 0.5 x 10-4 mm Hg at 991 °C to 760 mm Hg at 2270 °C

Endpoint:
vapour pressure
Type of information:
other: review article
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
secondary literature
Remarks:
The reference does not give sufficient experimental details and refers to secondary literature.
Principles of method if other than guideline:
No data available
GLP compliance:
not specified
Type of method:
other: not reported
Temp.:
727 °C
Vapour pressure:
0 mm Hg
Temp.:
1 127 °C
Vapour pressure:
0.044 mm Hg
Temp.:
1 527 °C
Vapour pressure:
5.6 mm Hg
Conclusions:
The vapour pressure of the substance was noted to be 0.0000074 mm Hg at 727 °C to 5.6 mm Hg at 1527 °C.
Executive summary:

The vapour pressure of tin was noted to be 0.0000074 mm Hg at 727 °C to 5.6 mm Hg at 1527 °C

Endpoint:
vapour pressure
Type of information:
other: Non-peer reviewed publically available data
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
secondary literature
Remarks:
The reference does not give sufficient experimental details and refers to secondary literature.
Principles of method if other than guideline:
No data available
GLP compliance:
not specified
Type of method:
other: not reported
Temp.:
1 492 °C
Vapour pressure:
1.333 hPa

Tin metal does not have a measurable vapour pressure under standard conditions of temperature and pressure.

Conclusions:
The vapour pressure of the substance was recorded to be 1.3332 hPa at 1482 °C.
Executive summary:

The vapour pressure of tin was recorded to be 1.3332 hPa at 1482 °C.

Endpoint:
vapour pressure
Type of information:
other: Safety data sheet
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
abstract
Remarks:
The reference does not give sufficient experimental details and is listed only in short abstract
Principles of method if other than guideline:
No data available
GLP compliance:
not specified
Type of method:
other: not reported
Temp.:
1 609 °C
Vapour pressure:
1 mm Hg
Conclusions:
The vapour pressure was stated to be 1 mm Hg at 1609 °C.
Executive summary:

The vapour pressure of tin was stated to be 1 mm Hg at 1609 °C.

Endpoint:
vapour pressure
Type of information:
other: compilation article
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Remarks:
The reference does not give sufficient experimental details and shows only vapour pressure curves.
Qualifier:
no guideline followed
Principles of method if other than guideline:
A collection of previously experimentally derived vapour pressures of elements performed and compiled by the author.
GLP compliance:
not specified
Type of method:
other: No data available
Temp.:
ca. 800 K
Vapour pressure:
ca. 0 mm Hg
Remarks on result:
other: The vapour pressure curve for Tin suggests that the vapour pressure is 1x10-11 mm Hg at ca 800 K
Conclusions:
The vapour pressure curve for Tin suggests that the vapour pressure is 1x10E-11 mm Hg at ca 800 K and as such the substance is anticipated to have a negligible vapour pressure at room temperature
Executive summary:

The vapour pressure curve for tin suggests that the vapour pressure is 1x10E-11 mm Hg at ca 800 K and as such the substance is anticipated to have a negligible vapour pressure at room temperature

Endpoint:
vapour pressure
Type of information:
other: personal communication
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Remarks:
Personal communication from National Physical Laboratory
Principles of method if other than guideline:
Personal communication between the ITRI and the National Physical Laboratory discussing the vapour pressure of pure tin at 25 °C calculated using the MTDATA thermodynamics code.
GLP compliance:
not specified
Type of method:
other: calculation method
Vapour pressure:
0 Pa
Remarks on result:
other: 2.29E-42 Pa

The following information has been provided via ITRI as a personal communication from the National Physical Laboratory:

The vapour pressure of pure tin at 25 °C is extremenly small. A calculation using our MTDATA thermodynamics code indicates a pure tin vapour pressure of 2.29E-42. In the presence of limited amounts of oxygen, the SnO(g) species (theoretically) becomes the most significant source of tin in the gas. MTDATA calculates the partial pressures as:

pp(Sn) = 2.29E-42 Pa

pp(SnO) = 1.18E-40 Pa

If oxygen is in excess, the SnO2 soild phase forms and the concentration of tin containing species falls dramatically. This exercise may be repeated with other possible tin transport agents (e.g. H, Cl). In most cases an enhancement over the pure tin vapour pressure would be expected.

Conclusions:
The vapour pressure of tin is 2.29E-42 Pa
Executive summary:

The vapour pressure of tin was reported to be 2.29E-42 Pa

Description of key information

A number of articles in the public domain, published papers and Safety Data Sheets record the vapour pressure of tin as ranging from 2.29E-42 at 25 °C up to 133.332 Pa at 1609 °C

Key value for chemical safety assessment

Vapour pressure:
1 Pa
at the temperature of:
1 497 K

Additional information

The range of values for the vapour pressure of tin covers a large range of results across a range of different temperatures. The vapour pressure of tin is relatively small and is difficult to measure accurately at low temperatures. The resulting margins of error are quite high and can be complicated if there is any chance of volatilisation by tin compounds e.g. oxides or sulphides.

Two of the results have vapour pressures of 0.08 mm Hg (equivalent to 1.06 Pa) and 1 Pa at 1224 °C. On the basis that these are the only consistent results within the dataset a value of 1 Pa at 1224 °C has been selected.