Quality Attribute

Quality Attribute designates any physical, chemical, biological, or microbiological property or characteristic of materials, intermediates, or products requiring monitoring and control ensuring acceptable quality. These measurable features encompass diverse parameters including appearance, identity, assay, purity, impurities, potency, stability, dissolution, particle size, pH, sterility, endotoxin, moisture content, and numerous others depending on product type. Critical quality attributes directly impacting safety or efficacy require tight control, while non-critical attributes have wider acceptance ranges.

The pharmaceutical industry identifies, characterises, and controls quality attributes throughout development and manufacturing ensuring consistent product quality. Quality by Design approaches systematically identify quality attributes through risk assessment linking product characteristics to clinical performance. Analytical method development creates validated procedures accurately measuring quality attributes, with specifications establishing acceptable ranges based on clinical trial material characterisation, stability data, and manufacturing capability. For complex biologics, quality attributes include primary structure, higher order structure, glycosylation patterns, charge variants, size variants, and biological activity. Stability programs monitor quality attributes over time under various conditions. Comparability protocols assess quality attributes following manufacturing changes. Regulatory submissions include comprehensive quality attribute characterisation with justification for specifications. As biologics dominate pipelines with complex quality profiles, quality attribute identification and control continue evolving ensuring product consistency.