Pharmaceutical Manufacturing and GMP Cleanroom Cleaning — MHRA, EU GMP and ISO Cleanroom Standards

Pharmaceutical manufacturing in the UK is regulated by the Medicines and Healthcare products Regulatory Agency (MHRA) under a Good Manufacturing Practice (GMP) framework derived from EU GMP guidelines retained in UK law post-Brexit. Cleaning in pharmaceutical manufacturing environments -- production suites, cleanrooms, fill-and-finish areas, quality control laboratories and warehouse areas -- is a validated, documented manufacturing process, not a support service. Contamination of pharmaceutical products from inadequate cleaning can cause patient harm, product recalls and MHRA enforcement action including licence suspension. The cleaning equipment used in GMP environments must itself meet specific requirements for material compatibility, particle generation and the ability to be cleaned and decontaminated.

Pharmaceutical cleaning validation is a specialist discipline requiring site-specific expertise. This page covers the cleaning equipment implications of GMP and cleanroom environments -- the types of equipment appropriate to different cleanroom grades, the contamination control requirements that drive equipment selection, and the regulatory framework that governs cleaning in pharmaceutical manufacturing.

The regulatory framework

MHRA and UK GMP

The MHRA grants Manufacturing Authorisations (MAs) to pharmaceutical manufacturers. To hold an MA, manufacturers must comply with UK GMP -- the Good Manufacturing Practice guidelines published as part of the Human Medicines Regulations 2012 and the retained EU GMP Annex series. MHRA inspectors carry out GMP inspections and can issue critical, major and other deficiencies that must be remediated within specified timeframes. Cleaning and contamination control are among the most common inspection findings.

EU GMP Annex 1 -- Manufacture of Sterile Medicinal Products (2022)

Annex 1 to the EU GMP guidelines (updated 2022, adopted for UK GMP) sets the most demanding cleaning and contamination control requirements in pharmaceutical manufacturing. It applies to the manufacture of sterile medicinal products -- injectables, ophthalmics, sterile creams and infusions. Annex 1 requires a Contamination Control Strategy (CCS) that covers cleaning equipment, cleaning agents, cleaning validation and environmental monitoring. The 2022 revision significantly strengthened requirements and is now the benchmark for sterile manufacturing cleaning programmes globally.

ISO 14644 -- Cleanrooms and associated controlled environments

ISO 14644 is the international standard series for cleanroom classification and operation. ISO 14644-1 defines cleanroom grades by airborne particle counts. The pharmaceutical industry uses both ISO classification and the EU GMP A/B/C/D grade system -- these are broadly aligned but not identical. Cleaning equipment used in ISO-classified cleanrooms must not itself be a source of particulate contamination.

Cleanroom grades and cleaning equipment implications

Grade A / ISO 5 -- Critical zone, highest cleanliness

Grade A environments are the zone directly around open product -- filling needles, open containers, stoppers before sealing. The air in Grade A zones is ultra-clean (particle count equivalent to ISO 5). Cleaning equipment entering a Grade A zone must be dedicated to that zone, constructed of materials compatible with the cleaning agents used (typically WFI -- water for injection -- and pharmaceutical-grade IPA or hydrogen peroxide), able to be cleaned and sterilised, and must not shed particles or fibres. Standard industrial vacuum cleaners are not appropriate for Grade A environments. HEPA-filtered, stainless construction, validated cleaning equipment is required.

Grade B / ISO 7 -- Background environment to Grade A

Grade B is the background environment within which Grade A operations take place in isolators or RABS (Restricted Access Barrier Systems). Cleaning in Grade B follows similar requirements to Grade A -- dedicated equipment, validated cleaning procedures, documented completion records. H-Class HEPA filtration (99.995% at 0.3 microns) is the minimum filtration standard for vacuum equipment used in Grade B environments. H-Class extraction

Grade C and D / ISO 8 -- Less critical manufacturing areas

Grade C and D areas include preparation rooms, corridor areas, component preparation and less critical production areas. Cleaning equipment for Grade C and D areas must still meet material compatibility and particle generation requirements, but the specification is less demanding than for Grades A and B. M-Class HEPA filtration (99.9% at 0.3 microns) may be appropriate for Grade D areas depending on the cleaning validation outcome and site-specific risk assessment. M-Class extraction

Non-classified areas -- warehousing, utilities, external areas

Non-classified areas in pharmaceutical facilities -- finished goods warehousing, utilities plant rooms, external areas -- follow standard industrial cleaning compliance frameworks (COSHH, environmental permitting, PUWER) without the additional GMP requirements. Pressure washing of external areas, loading bays and vehicle access routes follows the same specification as other commercial industrial premises. Environmental Permitting guidance

Equipment material compatibility

Cleaning agents used in GMP environments include pharmaceutical-grade IPA (isopropyl alcohol), hydrogen peroxide vapour and solution, sodium hypochlorite, peracetic acid and WFI. Many of these are highly oxidising or flammable. Equipment used in GMP cleaning must be constructed of materials compatible with these agents -- stainless steel construction for tanks, hoses and fittings in contact with cleaning agents; chemical-resistant seals; no materials that shed particles or fibres when exposed to cleaning chemicals.

DSEAR assessment is required for any GMP cleaning operation using flammable cleaning agents (IPA, flammable solvents). Cleaning equipment used in areas classified as ATEX zones must meet the appropriate ATEX category. DSEAR and ATEX guidance

Cleaning validation -- what it means for equipment

GMP requires that cleaning processes are validated -- that it can be demonstrated that the cleaning procedure reliably removes product residues, cleaning agents and microbiological contamination to acceptable levels. Cleaning validation applies to the equipment, the cleaning agent and the cleaning procedure as a system. A change to any element of the system -- including a change in cleaning equipment model or specification -- may require revalidation. This means that equipment procurement decisions in GMP environments must go through a change control process, and equipment specifications must be documented in the cleaning procedure and validation records.

For cleaning contractors working in pharmaceutical facilities, this has practical implications: equipment must be documented, approved and consistent. Substituting a different vacuum or pressure washer model without client approval is a potential GMP deviation.

Related legislation and compliance

Related sector pages

Manufacturing hub | Healthcare hub | Chemical industry hub | Facilities management

Trade accounts for pharmaceutical manufacturers and contractors

V-TUF supplies H-Class and M-Class extraction equipment, industrial vacuums and pressure washers to pharmaceutical manufacturers, contract cleaning companies working in GMP environments, and facilities management teams responsible for pharmaceutical facility maintenance across the UK.

Telephone: 01522 787978. Email through the contact page.

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Pharmaceutical Manufacturing and GMP Cleanroom Cleaning — MHRA, EU GMP and ISO Cleanroom Standards