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Boiling point

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boiling point
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Reason / purpose for cross-reference:
reference to same study
Principles of method if other than guideline:
Typically thermophysical properties of refrigerants are modeled using an EOS (equation of state). Cubic EOS are most commonly used when there is very little experimental data available. Some of the most common cubic EOS are reported by Walas1. An alternative EOS is an extended corresponding states equation. An extended corresponding states equation relates the properties of one fluid to another. The extended corresponding states model is typically more accurate than a simple cubic EOS but it can require more information about the fluid being modeled.

An extended corresponding states model as specifically designed for refrigerants was proposed by Huber and Ely2. An extended corresponding states model references a fluid that has a large amount of accurate experimental data. In the model proposed by Huber and Ely the reference fluid used a fluorocarbon with similar physical chemical characteristics of the test substance. In order to accurately describe the thermophysical properties of a fluid, Ely and Huber used shape factors that are correlated from experimental data, typically vapor pressure and saturated liquid density. The shape factors give the corresponding EOS the ability to accurately model the fluid of interest.
GLP compliance:
Type of method:
other: correlation using model of Huber and Ely
Key result
Boiling pt.:
-29 °C
Atm. press.:
760 mm Hg
The boiling point of the test substance is -29°C.

Description of key information

The boiling point of HFO-1234yf was determined using the model of Huber and Ely.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
-29 °C

Additional information