The comparatively high melting point of cysteamine (95-97 C), indicates that exists in a salt form.
Before any of these nutrients can be absorbed and used by the roots, they must be broken down into salt form.
I do not think acid-base reactions are very irreversible, unless some further molecular change happens after the salt forms.
In both cases, the salt forms of the amine make these otherwise lipophilic compounds water-soluble.
Lithium carbonate, in ionic or salt form, is commonly used as a psychiatric medication.
Different salt forms provide different amounts of elemental zinc.
Freebase or free base refers to the pure basic form of an amine, as opposed to its salt form.
As such the melting point of the solid salt form has no bearing on the system.
As salinity increases, crystallised salt forms and is extracted.
Mesoionic carbenes may be generated in situ with addition of a strong base to their salt forms.