noun-modifying (irregular)
Used before nouns in technical, industrial, cosmetic, or product contexts, often corresponding to English 'chemical'. More ordinary Japanese may use 化学 or 化学的 depending on the context.
この会社はケミカル製品を扱っている。
This company handles chemical products.
肌が弱い人はケミカルピーリングの前
People with sensitive skin should consult a doctor before a chemical peel.
noun-modifying (irregular)
Used in material and product names to mean synthetic or artificial rather than natural, especially in compound-like expressions.
このバッグは本革ではなくケミカルレザーを使っている。
This bag uses synthetic leather, not genuine leather.