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This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition
Issued and maintained by the United States Pharmacopeial Convention (USP)
—Octadecyl silane chemically bonded to porous or nonporous silica particles, supercially porous particles,(USP 1-Aug-2022) or ceramic microparticles, 1.5–10 µm in diameter, or a monolithic silica rod.

