noun, na-adjective, noun which may take the genitive case particle 'no'
high purity
Used as a noun or adjectivally (な/の) to describe substances, materials, or abstract qualities that are highly pure.
この研究所では高純度のシリコンを製造している。
This laboratory produces high-purity silicon.
高純度な水は実験に欠かせない。
High-purity water is essential for experiments.