perusaineiksi

Perusaineiksi is a Finnish term used in chemistry and formulation science to denote substances that serve as base materials or starting materials in a process. The translative form perusaineiksi means “as base substances” or “into base substances.” It is formed from perus- meaning base and aine meaning substance, with the suffix -iksi indicating designation or role.

In Finnish technical writing, perusaineiksi is used when listing components that constitute the core of a reaction, synthesis route, or product formulation. The term helps distinguish base materials from additives, catalysts, solvents, or intermediates. The exact interpretation depends on the field and the documentation.

Usage examples vary by domain. In polymer chemistry, monomers and initiators may be described as perusaineiksi; in pharmaceutical formulation, the active ingredients and other foundational ingredients may be treated as perusaineiksi. While the concept is practical for planning and communication, perusaineiksi does not imply a fixed legal category; its meaning is determined by context.

See also: starting material, base material, solvent, additive. The term is primarily used in Finnish-language technical literature and industry, and is less common in English-language sources.

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