chemicalische
Chemicalische is not a standard term in contemporary usages of English, German, or Dutch. In most contexts it appears as a misspelling, a stylized or archaic variant, or as part of a coined proper name rather than as an accepted dictionary entry. When encountered in German text, the equivalent correct adjective is chemische, which is used to describe things related to chemistry, such as chemische Verbindung (chemical compound) or chemische Reaktion (chemical reaction). In Dutch, the corresponding form is chemische for similar purposes. In English, the word chemical is the standard form.
Etymology and usage notes suggest that chemicalische would be understood primarily as a construction mixing English
In practice, if chemicalische appears in a text, readers should consider it likely intentional styling, a typographical