Analytical advances in pharmaceutical impurity profiling.

Area of Science:

• Pharmaceutical Science
• Analytical Chemistry

Background:

• Impurities are inherent in all drug substances and products.
• Regulatory guidelines (ICH Q3B(R2)) set impurity identification thresholds, e.g., 0.1% for daily doses < 2g.
• Analytical challenges vary, necessitating sophisticated techniques for certain impurities.

Purpose of the Study:

• To review current analytical techniques for impurity investigation and quantification in pharmaceuticals.
• To highlight advancements in chromatographic methods for impurity separation and measurement.
• To discuss the identification of classical, inorganic (metal residues), and solid-state impurities.

Main Methods:

• Review of current literature on analytical techniques for pharmaceutical impurities.
• Focus on chromatographic methods for separation and quantification.
• Inclusion of methods for classical, inorganic, and solid-state impurities.

Main Results:

• Progress in analytical techniques, especially chromatography, aids in impurity detection and quantification.
• Comprehensive approaches cover various impurity types, including metal residues and solid-state forms.
• Risk control strategies aligned with ICH guidelines are discussed.

Conclusions:

• Advanced analytical techniques are crucial for managing pharmaceutical impurities.
• Chromatography plays a key role in separating and quantifying related impurities.
• A holistic approach to impurity identification and risk management ensures drug safety.