Find a requirement or article

Requirement · EU GMP

Demonstrate sampling recovery

Recovery should be demonstrated for sampled contact materials and methods.

Recovery · Swab Sampling · Rinse Sampling

Requirement · EU GMP

Justify residue acceptance limits

Carryover limits require toxicological justification and consideration of equipment trains.

HBEL & PDE · MACO · Acceptance Criteria

Requirement · EU GMP

Define dirty and clean hold times

Account for both pre-cleaning and post-cleaning storage intervals.

Cleaning Validation · Hold Times

Requirement · EU GMP

Support worst-case product selection

Worst-case selection needs a scientific rationale and assessment of new products.

Worst Case · Shared Equipment

Requirement · EU GMP

Use visual inspection within validation

Visual inspection alone is generally insufficient for cleaning validation.

Visual Inspection · Acceptance Criteria

Requirement · EU GMP

Justify sampling locations

Protocols should identify sampling locations, their rationale and acceptance criteria.

Swab Sampling · Worst Case

Requirement · EU GMP

Include microbial and endotoxin risk

Consider microbial and endotoxin contamination when developing protocols.

Cleaning Validation · Microbial Control

Requirement · FDA

Define cleaning responsibilities

Written validation procedures should address responsibilities and acceptance decisions.

Cleaning Validation

Requirement · FDA

Prepare a study protocol

Prepare protocols addressing sampling and analytical method sensitivity.

Cleaning Validation · Analytical Methods

Requirement · FDA

Understand swab compatibility

Sampling materials and extraction solvents can influence analytical results.

Recovery · Swab Sampling

Requirement · FDA

Understand the rinse result

Rinse testing must meaningfully represent residues on equipment surfaces.

Recovery · Rinse Sampling

Requirement · FDA

Control time before cleaning

Residue drying can affect the effectiveness of a cleaning procedure.

Worst Case · Hold Times

Requirement · FDA

Document the validation conclusion

A management-approved report should establish whether cleaning is validated.

Cleaning Validation

Requirement · FDA

Reflect actual equipment use

Cleaning validation should reflect how equipment is actually used.

Worst Case · Shared Equipment

Requirement · FDA

Describe the cleaning study

Protocols should describe equipment, procedures, criteria and sample collection.

Cleaning Validation · Acceptance Criteria

Requirement · FDA

Select suitable sampling methods

Sampling should address soluble and insoluble residues appropriately.

Swab Sampling · Rinse Sampling

Requirement · FDA

Establish method capability

Analytical sensitivity and attainable recovery should support residue evaluation.

Recovery · Analytical Methods

Requirement · FDA

Monitor cleaning after validation

Monitor validated cleaning procedures at appropriate intervals during production.

Cleaning Validation · Revalidation

Requirement · FDA

Review the validated state

Periodically evaluate whether systems remain in a valid state.

Cleaning Validation · Revalidation

Requirement · EMA

Establish and reassess HBELs

Establish HBELs for medicinal products and reassess supporting data periodically.

HBEL & PDE · Shared Equipment

Requirement · EMA

Qualify the HBEL assessor

HBEL development requires suitable toxicological and pharmacological expertise.

HBEL & PDE

Requirement · EMA

Distinguish HBELs from cleaning alert limits

An HBEL is not automatically the operational cleaning limit.

HBEL & PDE · MACO · Acceptance Criteria

Requirement · EMA

Justify the changeover control strategy

Reduced analytical testing requires robust justification, including visual-inspection capability.

Visual Inspection · Shared Equipment

Requirement · Health Canada

Manage the cleaning lifecycle

Connect cleaning development, qualification and ongoing monitoring.

Cleaning Validation · Revalidation

Requirement · Health Canada

Address manual cleaning variability

Control operator-related variability in manual cleaning.

Cleaning Validation · Worst Case

Requirement · Health Canada

Assess new products before introduction

Evaluate new products within the existing cleaning control strategy.

Worst Case · Shared Equipment

Requirement · Health Canada

Design direct surface sampling

Surface sampling needs a justified, reproducible collection approach.

Recovery · Swab Sampling

Requirement · Health Canada

Assess cleaning-agent residues

Consider the selection and removal of cleaning agents.

Acceptance Criteria · Detergents

Requirement · MHRA

Use HBELs within risk assessment

HBEL implementation supports assessment of cross-contamination controls.

HBEL & PDE · Shared Equipment

Requirement · MHRA

Evaluate visual inspection capability

Reliance on visual inspection needs evidence supporting the intended limit.

Visual Inspection · Acceptance Criteria

Article · Other

The State of Cleaning Validation 2026: Five Developments Reshaping the Field

Two years of regulatory revision, enforcement, new standards, tighter analytics and a first serious statistics stack have moved cleaning validation out of the appendix and into the centre of GMP. Five developments define where the field stands in September 2026 — and each one changes something a programme owner has to decide.

Cleaning Validation · MACO · Worst Case · Analytical Methods · Revalidation

Article · Other

The Cleaning Validation Data Shift: From Offline Results to Process Intelligence

At-line TOC, in-line UV and automated process capability monitoring are moving cleaning data from a laboratory result reported days later to a signal produced during the cycle. A close reading of what is proven, what standards actually require, and what remains a promising research proposal.

Cleaning Validation · Analytical Methods · Acceptance Criteria

Article · Other

From Biologics to ADCs: Why New Modalities Are Changing Cleaning Validation

Biologics degrade under cleaning, ADCs split one residue into antibody, linker, payload and conjugate, and peptide APIs combine high potency with methods already under strain. A synthesis of the local evidence on why toxicology, cleaning and detectability now move together.

Cleaning Validation · HBEL & PDE · Worst Case · Analytical Methods

Article · Other

Visual Clean Is Important — but When Is It Enough?

Visual inspection was present in every one of the cleaning findings FDA issued between 2024 and 2026 — never as the accused technique, always as the whole of the evidence. The distinction between a qualified visual method and a visual-only release decision is the difference between a control and an assumption.

Cleaning Validation · MACO · Visual Inspection · Acceptance Criteria

Article · Other

HPLC, LC-MS/MS, TOC, UV or Visual Inspection? Choosing a Cleaning Validation Method by Risk

The analytical method is not a laboratory preference — it is the part of the cleaning validation strategy that decides whether a limit is actually measurable. The useful question is not which technique is 'best' but which technique matches the residue, the acceptance limit, the sampling method and the surface. This analysis walks through the trade-offs using published recovery, detection and clearance data, and shows why a method chosen before the residue is characterised tends to fail at the limit rather than at the bench.

Cleaning Validation · Recovery · Analytical Methods · Acceptance Criteria

Article · Other

From Three Runs to Lifecycle Control: What Continued Cleaning Verification Really Means

The three-run cleaning validation was never a requirement — it was the convention that grew where guidance was silent. PI 006-4, the ASTM cleaning standards and three recent FDA warning letters all point at the same thing: what has to be maintained is a validated state, and continued cleaning verification is how you know it still holds.

Cleaning Validation · Worst Case · Acceptance Criteria · Revalidation

Article · Other

A MACO Is Only as Good as the Assumptions Behind It

A maximum allowable carry-over value is a PDE multiplied by a set of process assumptions — batch size, dose, surface area, recovery and the cleaning step itself. Read as a body of evidence, the 2025–2026 enforcement record is rarely about toxicity assessment, and almost always about those assumptions.

Cleaning Validation · HBEL & PDE · MACO · Recovery · Acceptance Criteria

Article · Other

How to read a regulatory reference

Separate the source, its scope and the decision you need to make.

Article · Other

Build a sampling map someone else can use

A practical approach to connecting equipment, locations and samples.

Article · Other

Plan a recovery study around the actual method

Make the link between test surfaces and routine sampling explicit.

Article · Other

Make hold-time definitions unambiguous

Define the events behind the timestamps before evaluating the interval.

Article · Other

Review a change through the cleaning programme

Follow a proposed change across the evidence that supports routine use.

Article · EU GMP

PIC/S Publishes PI 006-4: A New Qualification and Validation Recommendation Takes Effect in October

PIC/S has published PI 006-4, the revised Recommendations on Qualification and Validation, superseding the 2007 PI 006-3 and entering into force on 1 October 2026. Cleaning validation now occupies a full chapter, with HBEL-driven scope, explicit limits on visual inspection and a clear position against continued test-until-clean practice.

Cleaning Validation · HBEL & PDE · MACO · Recovery · Swab Sampling · Rinse Sampling · Worst Case · Visual Inspection · Hold Times · Analytical Methods · Acceptance Criteria · Revalidation · Microbial Control · Detergents

Article · Other

A validation promise needs an interim control strategy

FDA connects unvalidated cleaning on shared equipment with interim measures and the assessment of distributed products.

Article · FDA

FDA Challenges a Visual-Only Cleaning Validation Strategy

A 2026 FDA warning letter to Dabur India rejects a shared-equipment cleaning programme that relied exclusively on visual inspection. The objection is narrower than it appears — and it turns on missing quantitative limits, not on visual inspection itself.

Cleaning Validation · MACO · Swab Sampling · Visual Inspection · Acceptance Criteria

Article · FDA

What FDA Has Been Citing in Cleaning Validation: The Recurring Themes of 2025–2026

Twelve FDA warning letters issued between 3 December 2024 and 24 July 2026 cite cleaning and cross-contamination control. Read together rather than case by case, they stop looking like twelve incidents and start looking like one audit checklist: worst-case selection, hold times, recovery, MACO justification, visual-only strategies, sampling locations, change control and lifecycle management — in that order of frequency.

Cleaning Validation · MACO · Recovery · Swab Sampling · Worst Case · Visual Inspection · Hold Times · Shared Equipment · Revalidation

Article · EMA

Annex 15 Corrigendum: Small Text, Big Consequences for Cleaning Teams

EMA and PIC/S reissued the January 2026 Annex 15 concept paper in July 2026 with a new reference number and a substantially longer timetable. Nothing about cleaning validation itself changed — but the dates most teams are planning against did.

Cleaning Validation · Hold Times · Revalidation

Article · Other

ADCs Are Creating a New Cleaning Validation Problem

Antibody-drug conjugates combine a biologic, a chemical linker and a cytotoxic payload on shared equipment. A STERIS webinar frames the problem; independent guidance shows why one product-specific assay no longer answers the question.

Cleaning Validation · HBEL & PDE · MACO · Recovery · Worst Case · Analytical Methods · Shared Equipment

Article · Other

An HBEL is not the same as an operating target

An evergreen source briefing on the distinction between the safety basis and routine cleaning limits.

Article · FDA

Peptide APIs Put Cleaning Limits Under the Microscope: FDA Cites Missing MACO for Semaglutide and Tirzepatide

FDA's 1 May 2026 warning letter to Harbin Jixianglong Biotech found a cleaning procedure that required a toxicity-based carryover limit, and a validation study that established none — with no justification for swab locations and no swab results.

Cleaning Validation · HBEL & PDE · MACO · Swab Sampling · Analytical Methods · Shared Equipment

Article · Other

Cleaning records and equipment condition must tell the same story

Observed residues and the response to them put cleaning effectiveness and product-impact assessment in focus.

Article · Other

Worst Case or Product-Specific? New Research Reopens the Cleaning Validation Strategy Debate

A comparative review in the PDA Journal weighs worst-case matrices against product-specific validation and proposes a hybrid model anchored on visible residue limits.

Cleaning Validation · HBEL & PDE · Worst Case · Visual Inspection · Acceptance Criteria · Shared Equipment · Revalidation

Article · Other

When equipment marked clean still carries visible residue

A visible-residue observation illustrates the gap between a clean-status label and demonstrated cleaning effectiveness.

Article · FDA

Released as Clean, Yet Residue Remained: A Simple Finding With a Bigger System Lesson

An FDA investigator found white residue inside Tank #68 at Chemco Corporation — equipment the quality unit had already verified as clean. The finding itself is mundane. What it exposes about release decisions, shared equipment and the absence of cleaning validation is not.

Cleaning Validation · Visual Inspection · Shared Equipment · Revalidation

Article · Other

Residual moisture belongs in the cleaning discussion

The letter links equipment cleaning, drying and microbial contamination risk in sterile manufacturing.

Article · EU GMP

EU and PIC/S Start the Next Revision of Annex 15 — What Validation Teams Should Watch

A joint EMA–PIC/S concept paper proposes extending Annex 15 to active substance manufacturers and aligning it with ICH Q9(R1). The current Annex 15 stays in force, and the earliest a revised text could be published is 2028.

Cleaning Validation · Worst Case · Visual Inspection · Hold Times · Analytical Methods · Acceptance Criteria · Shared Equipment · Revalidation

Article · FDA

Can a Cleaning Validation Demonstrate Reproducibility If Every Run Samples Somewhere Different?

FDA's Warning Letter 320-26-43 to Cosmetic Manufacturers (Aust) Pty Ltd. states that the firm's cleaning validation protocol 'was not designed to demonstrate reproducibility'. The cause is a design flaw that is easy to copy by accident: each qualification run sampled a different set of locations, so the runs were never replicates of the same measurement.

Cleaning Validation · Swab Sampling · Worst Case · Shared Equipment

Article · FDA

A Cleaning Verification Programme Is Only Useful If It Can Detect the Risk

FDA Warning Letter 320-26-40 to Cohance Lifesciences did not turn on a single residue number. It turned on whether the firm's verification programme could have found the carryover at all — and whether its worst-case basis was ever revisited.

Cleaning Validation · Worst Case · Analytical Methods · Shared Equipment · Revalidation

Article · Other

AI Enters Continued Cleaning Process Verification — but the Statistics Come First

A January 2026 AAPS PharmSciTech paper proposes normalising every residue result to a percentage of its own specification limit, so that cleaning data from different products can finally be pooled, analysed non-parametrically and monitored as a Stage 3 capability index. The statistical argument is the substance; the AI framing is thinner than the title suggests.

Cleaning Validation · MACO · Swab Sampling · Analytical Methods · Acceptance Criteria · Revalidation

Article · FDA

When the Cleaning Validation No Longer Matches the Factory

FDA's December 2025 letter to Medinatura New Mexico records a firm acknowledging that its cleaning validation was not reflective of current operations after years of buying new equipment and adding new products. What the gap looks like from the inside — and what it asks of change control.

Cleaning Validation · Worst Case · Hold Times · Shared Equipment · Revalidation

Article · Other

Cleaning Validation Is Becoming an Operational Strategy, Not Just a Compliance Exercise

A BeNeLux ISPE event on 23 September 2025 put 'business continuity' and 'culture' next to 'compliance' in the same talk title. That framing is the story: cleaning validation is being repositioned as an operational capability that keeps multi-product campaigns running, not a documentation obligation discharged before an inspection.

Cleaning Validation · Worst Case · Shared Equipment

Article · FDA

A Cleaning Validation Can Age: What Happens When Products Change but the Study Does Not

The FDA's August 2025 warning letter to ABBE Laboratories describes a 2009 cleaning validation still standing while a harder-to-clean product was introduced onto the same shared kettle — and no change-control step that caught it.

Cleaning Validation · Worst Case · Hold Times · Analytical Methods · Acceptance Criteria · Shared Equipment · Revalidation

Article · Other

Can Cleaning Be Monitored in Real Time? In-Line UV Moves Validation Closer to PAT

A STERIS-authored article in Pharmaceutical Technology reports that in-line UV spectrometry at 220 nm can follow a biopharmaceutical cleaning cycle continuously, from heavily soiled rinse to baseline. The data are encouraging, the framing is vendor-supplied, and the distance between process monitoring and a release decision is where our own thinking has to do the work.

Cleaning Validation · Rinse Sampling · Worst Case · Analytical Methods · Acceptance Criteria

Article · Other

Should Cleaning Validation Extend Into the QC Laboratory?

A 2025 DARU Journal of Pharmaceutical Sciences study builds a structured cleaning-validation protocol for QC-lab glassware and stainless-steel equipment, using oxcarbazepine as worst-case API and pairing HPLC residue analysis with conductivity and TOC detergent checks.

Cleaning Validation · Recovery · Swab Sampling · Rinse Sampling · Worst Case · Analytical Methods · Acceptance Criteria · Shared Equipment

Article · Other

ASTM E3470-25: Cleaning Risk Management Gets a Dedicated Method Standard

ASTM International has published E3470-25, a first-edition guide on using FMECA and HACCP/HARPC to identify, analyse and control risk in pharmaceutical and medical device cleaning processes. It is the method layer that E3106 required but did not fully specify.

Cleaning Validation · Acceptance Criteria · Microbial Control · Detergents

Article · EMA

ASTM Updates Its HBEL Guide: What E3219-25 Means for Cleaning Validation

ASTM has re-issued E3219 as E3219-25, the current reference for deriving health-based exposure limits. HBELs are a decade-old regulatory expectation, not a 2025 novelty — but the revision sharpens how limits are derived, documented and defended.

Cleaning Validation · HBEL & PDE · MACO · Acceptance Criteria

Article · Other

Lab, At-Line, Online, In-Line: Where Does TOC Fit?

TOC can live on the QC bench, on the shop floor next to the vessel, or plumbed into the CIP skid. The instrument is the same; the sampling chain — and therefore the meaning of the number — is not.

Cleaning Validation · Swab Sampling · Rinse Sampling · Analytical Methods

Article · Other

Do Cleaning Validation Programmes Need Every Analytical Test They Currently Run?

A lightning talk at PDA Week 2025 argued for a lean approach to analytical panels in cleaning validation. The independent framework to justify it already exists in ASTM E3106 and ICH Q9(R1) — but only if the arithmetic is documented.

Cleaning Validation · HBEL & PDE · Visual Inspection · Analytical Methods · Acceptance Criteria

Article · Other

INTERPHEX 2025: Process Monitoring Reaches the Cleaning Suite

INTERPHEX 2025 in New York put cleaning validation on the process-monitoring agenda: a dedicated panel on analytics, contamination control and sustainability, plus cleanroom and environmental-monitoring sessions. Industry-press report from Javits Center, 1-3 April 2025.

Cleaning Validation · MACO · Analytical Methods · Acceptance Criteria · Revalidation

Article · FDA

What Does 'Clean' Mean When Equipment Status and Physical Condition Disagree?

A March 2025 FDA warning letter to Aspen Biopharma Labs Private Limited records investigators finding manufacturing equipment labelled "Cleaned" while liquid with a floating substance or residue remained on product-contact surfaces. That gap between a status tag and physical reality is one of the most consequential — and most preventable — failures in cleaning validation.

Cleaning Validation · Visual Inspection · Acceptance Criteria · Shared Equipment

Article · FDA

When MACO Is Not Enough: What the Granules India Warning Letter Really Teaches

The FDA rejected a retrospective MACO argument in a February 2025 warning letter — not because the arithmetic was wrong, but because the cleaning it assumed had not been performed. What cleaning-validation teams can take from it.

Cleaning Validation · MACO · Recovery · Swab Sampling · Worst Case · Hold Times · Shared Equipment · Microbial Control

Article · FDA

Visual Inspection Alone Was Not Enough: What FDA Expected to See

In Warning Letter 320-25-38 the FDA did not attack visual inspection as a technique. It objected to a cleaning programme in which visual inspection was the only evidence on the table — no acceptance criteria for carryover residues, no analytical data, and no procedures for the rest of the equipment train.

Cleaning Validation · Visual Inspection · Analytical Methods · Acceptance Criteria

Article · Other

Cleaning Validation Meets Waste Treatment: A Study of SGLT-2 Inhibitor Residues

A NIPER-Ahmedabad group pairs a validated RP-HPLC surface-residue method for three SGLT-2 inhibitors with a detoxification strategy for the resulting cleaning waste.

Cleaning Validation · Recovery · Swab Sampling · Analytical Methods · Acceptance Criteria · Detergents

Article · FDA

FDA Again Links Shared Equipment to the Need for a Lifecycle Cleaning Programme

A December 2024 warning letter to Brands International Corporation cites the firm under 21 CFR 211.67(b) for failing to perform cleaning validation studies on non-dedicated equipment — and asks for a cleaning programme built around worst-case products, worst-case swab sites and maximum hold times before cleaning.

Cleaning Validation · Worst Case · Shared Equipment · Revalidation

Article · FDA

When Shared Equipment Has Never Been Cleaning-Validated: Lessons From an FDA Warning Letter

An FDA Warning Letter to Indian API manufacturer Micro Orgo Chem describes non-dedicated equipment that had never been cleaned under a validated procedure, cleaning SOPs that were not followed, and no evidence that the rinse and swab samples required by the firm's own procedure were ever collected or tested.

Cleaning Validation · Swab Sampling · Rinse Sampling · Worst Case · Visual Inspection · Hold Times · Shared Equipment · Revalidation · Microbial Control

Article · Other

ASTM Puts Process Capability on the Cleaning Validation Agenda

ASTM work item WK92658 wants to standardise how cleaning processes are judged capable — one-sided limits, small data sets, non-normal residues and continued verification included. It is the statistical gap E3106 left open.

Cleaning Validation · Swab Sampling · Worst Case · Analytical Methods · Acceptance Criteria · Revalidation

Article · Other

What Happens to Biologics During Cleaning? New Data on Cleaning-Induced Protein Degradants

A bench-scale study puts the 650 ug/dose parenteral PDE for cleaning-induced protein degradants to the test with human-cell immunogenicity assays on HLE BiTE and mAb degradants, spiked into the same and a cross product.

Cleaning Validation · HBEL & PDE · MACO · Worst Case · Analytical Methods · Acceptance Criteria · Shared Equipment

Article · Other

ASTM Moves Toward Dedicated Guidance for TOC in Cleaning Validation

ASTM Work Item WK92599 would give total organic carbon analysis its own dedicated guidance for swab and rinse samples — and force cleaning programmes to defend recovery and limits, not just concentrations.

Cleaning Validation · Swab Sampling · Rinse Sampling · Analytical Methods

Article · Other

Cleaning Validation Beyond Manufacturing Vessels: What About Blister Packaging?

A German hospital-pharmacy study argues blister-machine cleaning is a mandatory duty of care, and shows UV-Vis spectroscopy can replace HPLC as the analytical method.

Cleaning Validation · Analytical Methods · Acceptance Criteria · Shared Equipment