Analytical Quality Control News

EMA/CMDh: Nitrosamine Q&A Document updated

The Q&A document "Questions and answers for marketing authorisation holders/applicants on the CHMP Opinion for the Article 5(3) of Regulation (EC) No 726/2004 referral on nitrosamine impurities in human medicinal products", which was prepared jointly by the EMA and the CMDh, has been updated once again and published in the new revision 22 on the EMA website.

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USP informs about Monographs affected by the Revision of NMR Chapters <761> and <1761>

Revisions to USP Chapters <761> Nuclear Magnetic Resonance Spectroscopy and <1761> Nuclear Magnetic Resonance Spectroscopy—Theory and Practice were proposed for comment in PF 49(5) and are scheduled to become official on 1 December 2025. The USP has now identified other documentary standards that reference these chapters and has published a list of monographs that will be revised accordingly.

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APIC: Update of the Nitrosamine Guide

The guideline 'Additional guidance on the assessment on the risk assessment for presence of N-nitrosamines in APIs', first published in February 2020, has now been revised by a subgroup of the 'APIC Nitrosamines Task Force' and recently published in its latest version on the APIC website. The document is now called 'Nitrosamine Risk Management: Guidance for API Manufacturers' and has been extensively updated.

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ICH: New Guideline for Stabilities

The draft guideline "STABILITY TESTING OF DRUG SUBSTANCES AND DRUG PRODUCTS" of the ICH was published in April 2025 and is now available for public comment.

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FDA Warning Letter for Chinese Manufacturer: Inadequate Testing and Stability Program Deficiencies

The U.S. Food and Drug Administration (FDA) has issued a Warning Letter to a Chinese OTC manufacturer, highlighting CGMP deficiencies in raw material testing, process controls, stability testing, and quality oversight.

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FDA Warning Letter: Missing Testing for Toxic Impurities and Lack of Stability Data in OTC Drug Products

In a recent Warning Letter, the FDA outlines severe GMP deficiencies in the manufacture of OTC hand sanitizers and antibacterial soaps, including missing identity testing, lack of stability data, and absent process validation. Critical raw materials such as glycerin and ethanol were accepted without proper testing – despite their known risk of contamination with diethylene glycol (DEG), ethylene glycol (EG), or methanol, substances that have caused fatal poisoning incidents worldwide.

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Proposal for USP Chapter <320>: NMR-Based Determination of Degree of Hydrolysis and Monomer Ratio in Polyvinyl Alcohols

In the Pharmacopeial Forum, PF 51(3), a proposal for a new chapter <320> NMR Spectroscopy for the Determination of Degree of Hydrolysis for Polyvinyl Alcohol and Vinyl Alcohol Homopolymer, and Monomer Ratio for Vinyl Alcohol and Vinyl Acetate Copolymer has been published for public comment. The commenting period is open until 31 July 2025.

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New ICH Q1 Draft Guideline - What’s Changing in Stability Testing

On 11 April 2025, the new ICH Q1 Draft Guideline “Stability Testing of Drug Substances and Drug Products” was published, marking a comprehensive revision and consolidation of the former ICH Q1A–F and Q5C Guidelines. Against this background, the ECA is offering a compact, 3-hour Live Online Training on 18 June 2025. The training is designed to provide participants with a clear overview of changes, new aspects and interpretations of the upcoming regulatory expectations with respect to the stability strategy.

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New ECA Guidance on Sampling and Sample Management

The ECA Analytical Quality Control Group (AQCG) has published a new guidance document on Sampling and Sample Management. The PDF file is available for free in the AQCG members area. Additionally, a free webinar for all members is scheduled for 17 June 2025.

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Update of USP Chapter <1099> on Content Uniformity in Large Samples

In the current Pharmacopeial Forum, PF 51(3), the USP has published a revised draft of General Chapter <1099> Limit on Number of Large Deviations When Assessing Content Uniformity in Large Samples. The deadline for submitting comments is 31 July 2025.

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