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Physical & Chemical properties

Boiling point

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boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
no guideline required
other: data was retrieved and compiled from handbooks or primary literature
Principles of method if other than guideline:
Handbook data: The data in the handbook have been derived from many sources, including both the primary literature and evaluated compilations. The Handbook of Data on Organic Compounds, Third Edition and the Chapman & Hall/CRC Combined Chemical Dictionary were important sources. Other useful compilations of physical property data for organic compounds are listed in the references below. Many boiling point values (and some melting point and density values) were taken from recent physical chemistry literature dealing with fluid properties. Where conflicts were found, the value deemed most reliable was chosen.
1. Laboratory reagent lists, e.g., the ACS Reagent Chemicals volume (Ref. 1)
2. The DIPPR list of industrially important compounds (Ref. 2) and the (much larger) TSCA Inventory of chemicals used in commerce
3. The Hazardous Substance Data Bank (Ref. 3)
4. The UNEP list of Persistent Organic Pollutants (Ref. 4)
5. Chemicals on Reporting Rules (CORR), a database of about 7500 regulated compounds prepared by the Environmental Protection Agency (Ref. 5)
6. The EPA Integrated Risk Information System (IRIS), a database of human health effects of exposure to chemicals in the environment (Ref. 6)
7. Compendia of chemicals of biochemical or medical importance, such as The Merck Index (Ref. 10)
8. Specialized tables in this Handbook
9. Linstrom, P. J., and Mallard, W. G., Editors, NIST Chemistry WebBook, NIST Standard Reference Database No. 69, July 2001, National Institute of Standards and Technology, Gaithersburg, MD 20899, .
10. Thermodynamics Research Center, National Institute of Standards and Technology, TRC Thermodynamic Tables, .
11. O’Neil, M. J., Editor, The Merck Index, Thirteenth Edition, Merck & Co., Rahway, NJ, 2001.
12. Stevenson, R. M., and Malanowski, S., Handbook of the Thermodynamics of Organic Compounds, Elsevier, New York, 1987.
13. Riddick, J. A., Bunger, W. B., and Sakano, T. K., Organic Solvents, Fourth Edition, John Wiley & Sons, New York, 1986.
14. Physical Constants of Hydrocarbon and Non-Hydrocarbon Compounds, ASTM Data Series DS 4B, ASTM, Philadelphia, 1988.
15. Beilstein Database, <>.
16. Landolt-Börnstein Numerical Data and Functional Relationships in Science and Technology, .
17. Vargaftik, N.B., Vinogradov, Y. K., and Yargin, V. S., Handbook of Physical Properties of Liquids and Gases, Third Edition, Begell House, New York, 1996
18. Lide, D. R., and Kehiaian, H. V., Handbook of Thermophysical and Thermochemical Data, CRC Press, Boca Raton, FL, 1994.
19. Lide, D. R., Editor, Properties of Organic Compounds, .
GLP compliance:
Type of method:
distillation method
Boiling pt.:
> 227 °C
Atm. press.:
1 atm
Decomp. temp.:
227 °C
Boiling pt.:
110 °C
Atm. press.:
19 mm Hg
Whereas the substance 1,3-diiodopropane decomposes at 1 atm at 227 °C, it can be distilled at reduced pressure (19 mm Hg) at 110 °C.

Description of key information

Whereas the substance 1,3-diiodopropane decomposes at 1 atm at 227 °C, it can be distilled at reduced pressure (19 mm Hg) at 110 °C. Other supporting data describe boiling points at reduced pressure to be 71.5 °C at 2 mm Hg and 115 - 116 °C at 21 mm Hg, being in good correlation with these data. One supporting study mentions a boiling point of 219 - 222 °C, but does not mention, whether decomposition took place. From own studies (see flash-point study) it appears very likely that decomposition already starts at ~140 °C, indictaed by violet fumes (iodine).

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
227 °C

Additional information