Hydrochloric acid as the binary (two-component) mixture of HCl and H2O has a constant-boiling azeotrope at 20.2% HCl and 108.6 °C (381.8 K; 227.5 °F).

3.2.5 Boiling Point. 123 °F at 760 mmHg (USCG, 1999).

Hydrogen chloride ; Boiling point, −85.05 °C (−121.09 °F; 188.10 K) ; Solubility in water. 823 g/L (0 °C) 720 g/L (20 °C) 561 g/L (60 °C) ; Solubility, soluble in ...

bp. 100 °C (lit.) SMILES string. Cl. InChI.

Hydrochloric acid ; Melting point, −26 °C (247 K) 38% solution. ; Boiling point, 110 °C (383 K), 20.2% solution; 48 °C (321 K), 38% solution. ; Acid dissociation