Compound Lookup
Molar mass is calculated from IUPAC atomic weights [1]; the normal boiling point is calculated from the Antoine constants [2] and shown only where it falls inside their valid range. ΔHf° [3], critical constants [4] and flammability limits in air near 25 °C and 1 atm [5] are as tabulated; “—” means this site has no value. Vapour pressure at any temperature: Vapor Pressure (Antoine) calculator.
All Compounds
| Compound | Formula | M (g/mol), calc. | Normal bp (°C), calc. | ΔHf° 298.15 K (kJ/mol) | Tc (K) | Pc (bar) |
|---|
ΔHf° phase: g = ideal gas at 1 bar, l = liquid, s = solid [3]; elements in their standard state are 0. Pc in bar as tabulated in [4].
Acid Dissociation Constants, pKa at 25 °C
| Acid | Step | pKa |
|---|
At zero ionic strength, from [6] Appendix G (Tris from Table 8-2).
Ion Product of Water, pKw
| Temperature (°C) | pKw | Neutral pH (calc., pKw/2) |
|---|
pKw = −log10 Kw at atmospheric pressure (saturation pressure at 100 °C), from [7] as tabulated in [6] Table 6-1.