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Course Overview and Foundations

Classification of Impurities: Organic, Inorganic, Residual Solvents

Course Overview Details

What is your course about?

Who is the mini-course for?

Learning Objective

Teaching Goals (10)

Concept Breakdown and Practical Application

Slide-by-Slide Presentation

Slide 1 — Opening Hook (45 sec)

Slide 2 — Concept Simplified (60 sec)

Slide 3 — Case Study (90 sec)

Slide 4 — Practical Application (60 sec)

Key Concepts and Audit Readiness

10 Key Concepts

Slide 5 — Knowledge Check + Takeaways (45 sec)

Part B — Reflection

Part C — Top 5 Takeaways

10-Point Audit Checklist (Impurity Classification Readiness)

Quiz

Quiz 1: Fundamentals of Impurity Classification

Quiz 2: Exclusions and Scope

Quiz 3: Regulatory Control and Testing Strategies

Quiz 4: Analyzing Case Scenarios

Part A — Quiz (3 scenario questions on-slide; full 5-question set below)

Survey/Feedback

Course Evaluation Survey

Welcome to the definitive guide on ICH Q3A(R2) Impurity Classification. In the highly regulated pharmaceutical industry, ensuring patient safety and product quality is paramount.

Welcome to the definitive guide on ICH Q3A(R2) Impurity Classification. In the highly regulated pharmaceutical industry, ensuring patient safety and product quality is paramount. A critical component of this is the accurate classification and control of impurities in new drug substances. This comprehensive online course, "ICH Q3A(R2) Impurity Classification: Organic, Inorganic, and Residual Solvents," is meticulously designed to provide regulatory affairs professionals, quality assurance specialists, and analytical scientists with a deep understanding of impurity frameworks. Throughout this course, you will explore the fundamental concepts, purposes, and scopes of impurity classification as outlined in ICH Q3A(R2) Section 2. We will break down the underlying rationale for classifying impurities separately—recognizing that organic, inorganic, and residual solvents each carry distinct toxicological risks and require specific control strategies. By engaging with realistic case studies, slide-by-slide concept breakdowns, and a 10-point audit readiness checklist, you will learn how to build a defensible control strategy. You will also learn to differentiate between compliant and non-compliant practices, identify common specification errors, and understand the exclusions from Q3A, such as extraneous contaminants and polymorphic forms. Whether you are preparing for a regulatory audit or looking to strengthen your drug substance specifications, this course equips you with the practical skills needed to navigate complex compliance scenarios confidently. Join us to master impurity classification and safeguard your pharmaceutical products.

100. ICH Q3A(R2) Impurity Classification: Organic, Inorganic, and Residual Solvents

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            <p>The accurate classification of impurities within new chemical drug substances is a foundational element of pharmaceutical quality assurance, directly impacting patient safety, product quality, and regulatory compliance. As established in the ICH Q3A(R2) guideline, developing a defensible control strategy requires a precise understanding of how to categorize impurities into organic, inorganic, and residual solvent classes. This program is specifically designed for quality assurance reviewers, quality control analysts, manufacturing chemists, validation personnel, and regulatory affairs professionals tasked with writing, reviewing, or defending drug substance specifications. It is critical to establish at the outset that the scope of this material is strictly limited to new chemical entities; biological and biotechnological products are explicitly excluded from this framework, as those fall under the purview of the ICH Q6B guideline.</p>

<p>Structured to bridge the gap between regulatory theory and practical application, the curriculum systematically unpacks the distinct toxicological basis and control framework for each impurity class. Participants will progress through foundational overviews, realistic case studies, and detailed analyses designed to identify and mitigate common specification errors, such as misclassifying a residual solvent or mishandling a dual-purpose metal catalyst. By engaging with the core modules, professionals will cultivate the analytical competencies necessary to link specific impurities to the correct guidelines—including Q3A, Q3C, and Q3D—as well as to appropriate analytical methods and acceptance criteria. Culminating in a comprehensive review of key concepts and a 10-point audit readiness checklist, this training ensures that practitioners are fully equipped to establish, justify, and defend a scientifically sound and compliant impurity control strategy during regulatory inspections.</p>
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