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Chemical property
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<p>A chemical property is any of a <a href="/facts/Material_property/Cg2LVoQe">material's properties</a> that becomes evident during, or after, a <a href="/facts/Chemical_reaction/GpqWlKrz">chemical reaction</a>; that is, any attribute that can be established only by changing a substance's <a href="/facts/Chemical_substance/EWcXU41d">chemical identity</a>. Simply speaking, chemical properties cannot be determined just by viewing or touching the substance; the substance's <a href="/facts/Chemical_structure/r5rT1Lj4">internal structure</a> must be affected greatly for its chemical properties to be investigated. When a substance goes under a chemical reaction, the properties will change drastically, resulting in <a href="/facts/Chemical_change/vLTn0PDX">chemical change</a>. However, a <a href="/facts/Catalysis/LPBS7TQC">catalytic</a> property would also be a chemical property. </p><p>Chemical properties can be contrasted with <a href="/facts/Physical_properties/ujcMUceW">physical properties</a>, which can be discerned without changing the substance's structure. However, for many properties within the scope of <a href="/facts/Physical_chemistry/WqwnJjRM">physical chemistry</a>, and other disciplines at the boundary between <a href="/facts/Chemistry/SrNqkGVm">chemistry</a> and <a href="/facts/Physics/a7aH2y08">physics</a>, the distinction may be a matter of researcher's <a href="/facts/Perspective_(cognitive)/fUwYgCxe">perspective</a>. <a href="/facts/Material_properties/Cg2LVoQe">Material properties</a>, both physical and chemical, can be viewed as <a href="/facts/Supervenient/SL8w5Gcb">supervenient</a>; i.e., secondary to the underlying reality. Several layers of <a href="/facts/Supervenience/SL8w5Gcb">superveniency</a> are possible. </p><p>Chemical properties can be used for building <a href="/facts/Chemical_classification/ePAxWT8S">chemical classifications</a>. They can also be useful to identify an unknown substance or to separate or purify it from other substances. <a href="/facts/Materials_science/N5HrXRYW">Materials science</a> will normally consider the chemical properties of a substance to guide its applications. </p>