HPMC Hard Capsule Material Core concepts, definitions, properties, and foundational articles.
Covers solution-diffusion oxygen transmission in non-animal capsule shells, key material and environmental factors affecting OTR, and composition-dependent barrier behavior of HPMC capsules under moisture and structure variables.
Compare pullulan and HPMC as pharmaceutical hard capsule materials, covering chemical origin, compendial excipient and finished capsule requirements, mechanical behavior, oxygen barrier, moisture response, and formulation-relevant performance differences.
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