Chemistry term for a compound containing chlorine in the -1 oxidation state.
Table salt is a type of chloride called sodium chloride.
This aqueous solution contains chloride ions.
塩化物 is a full noun meaning 'a chloride (compound)', whereas 塩化 is only a prefix or vs-verb describing the act of chloridation and cannot stand alone as a noun for the substance.
Compound of 塩 (えん, 'salt' or 'chlorine') + 化 (か, '-ization') + 物 (ぶつ, 'substance'). The term follows the standard chemical naming pattern for compounds.