Pressure-Temperature Nomograph


Sigma-Aldrich Pressure Temperature NomoGraph

The Pressure-Temperature Nomograph allows you to quickly and easily estimate boiling points at various pressures. The interactive controls help simplify calculations to improve the efficiency of your distillation or evaporation requirements.

Launch NomoGraph

Physical Properties tab


Pressure Conversion Tab: Use the built-in Pressure Conversion Calculator which can convert between five units of pressure. Simply enter a numeric value or scientific notation and calculate.

Temperature Conversion Tab: Quickly calculate temperature conversions without leaving the Nomograph.

Physical Properties Tab: The Pressure-Temperature Nomograph provides physical data (650k PDF) for all your common solvents, including a list of relevant products.


Calculate a boiling point or pressure using the Antoine Equation: The Pressure-Temperature Nomograph is a graphical application of the Clausius-Clapeyron Equation, which assumes the heat of vaporization is a constant over a pressure range. Antoine´s Equation gets around this by using empirical data for each unique liquid under consideration.

Printable: Need a hard copy to take with you? Simply right-click and select 'print'.

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