chimiche
Chimiche is the feminine plural form of the Italian adjective chimico, used to describe things related to chemistry when the modified noun is feminine and plural. In everyday and scholarly Italian, you encounter expressions such as sostanze chimiche, reazioni chimiche and analisi chimiche, where chimiche agrees with the feminine plural nouns.
The term derives from the same etymological root as the word for the science itself, chimica. Chimico
Chimiche does not function as a standalone noun. It appears exclusively as an adjective that modifies feminine
In summary, chimiche is a grammatical form used to express chemical attributes in feminine plural contexts