Antimicrobial chemical compositions comprise an aluminum phosphate (AlP) solid dispersed within a binding polymer, wherein one or more bioactive materials are disposed within AlP forming a bioactive AlP complex. The complex may comprise the bioactive material chemically bonded with the AlP , physically combined with the AlP , or a combination of both. The complex may be formed according to precipitation , condensation and sol- gel methods of forming. The complex is engineered to provide a controlled delivery of the bioactive material or a constituent thereof upon exposure to moisture to give a desired level of antimicrobial resistance to a film or composite formed from the composition of at least about 30 µg/m2, and may also provide a desired degree of corrosion resistance through the release of passivating phosphate anion. Such antimicrobial chemical compositions provide an improved degree of active, long- term resistance to a broad range of micro -organisms when compared to known antimicrobial chemical compositions.