Vegetable-derived magnesium stearate functionality evaluation by DM(3) approach.

Area of Science:

• Pharmaceutical Sciences
• Materials Science
• Chemical Engineering

Background:

• Magnesium stearate (MgSt-V) is a critical lubricant in tablet manufacturing.
• Understanding MgSt-V's lubricating efficiency is vital for optimizing tablet quality.
• Variability in MgSt-V properties can affect critical product attributes.

Purpose of the Study:

• To quantify the lubricating efficiency of two crystalline vegetable-derived magnesium stearate (MgSt-V) grades.
• To evaluate the impact of MgSt-V fraction and blend time on tablet properties using the DM(3) approach.
• To establish relationships between MgSt-V's molecular/macroscopic properties and formulation outcomes.

Main Methods:

• Utilized a 2(3) factorial design with center points to assess MgSt-V fraction and blend time effects.
• Performed molecular characterization (moisture sorption, NMR, thermal analysis, XRD) and macroscopic analysis (particle size, SSA, morphology, BFE).
• Applied multivariate analysis (PCA, PLS) to model relationships between material properties, process variables, and tablet attributes (BFE, TMS, DT, LSR).

Main Results:

• MgSt-V fraction and blending time, including their square effects, demonstrated statistically significant impacts on tablet properties.
• Despite significant variations in MgSt-V's molecular and macroscopic characteristics, these differences did not significantly affect the studied product quality attributes.
• The DM(3) approach successfully modeled the interplay between material properties, manufacturing factors, and tablet performance.

Conclusions:

• Functional testing may be more appropriate than solely relying on molecular/macroscopic specifications for certain MgSt-V grades.
• Optimizing MgSt-V fraction and blend time is crucial for controlling tablet properties.
• The study highlights the complex relationship between excipient properties and final drug product performance.