def b23p_t(temperature):
    """Release on the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam 1997
      Section 4 Auxiliary Equation for the Boundary between Regions 2 and 3 Eq 5, Page 5"""
    return (348.05185628969 - 1.1671859879975 * temperature + 
        0.0010192970039326 * temperature ** 2)
