Kanya – Isofield

Choosing Sterile Gloves for EU GMP Annex 1 Cleanrooms: A Practical Guide

Kanya — Thu, 27 Nov 2025 06:44:30 +0000

This guide is engineered for Pharmaceutical manufacturers operating under EU GMP Annex 1. It explains how to select, validate, qualify, and routinely manage sterile gloves for Grade A/B/C/D environments with concrete, inspection-ready details. Use it as a specification template, training aid, and procurement playbook.

1) Executive summary (what to choose, fast)

Use disposable sterile gloves validated to a sterility assurance level (SAL) of 10^-6 (e.g., gamma-irradiated).
Material: cleanroom nitrile (low particulates/extractables); low protein sterile latex gloves where tactile acuity is critical and allergy risk is managed; avoid vinyl in Grades A/B.
AQL <= 0.65 for pinholes (Type I defects).
Endotoxin limit: target <= 20 EU/pair for aseptic processing.
Particle/ionic cleanliness: certified per lot with Certificate of Analysis (COA).
Length: 300–400 mm with beaded cuffs; use 400 mm+ where gown overlap is marginal.
Surface: textured/micro-roughened for IPA / Ethanol handling.
Packaging: pair-packed, walleted, sterile with lot-level irradiation and sterility certificates as
well as validation; designed for aseptic transfer.
Double-don protocol with sterile 70% IPA in-use disinfection at validated frequencies.

For Grades C/D, sterile gloves may still be required when handling sterilised components or high-risk operations; otherwise, non-sterile gloves may be acceptable where justified by risk assessment and SOPs.

2) What Annex 1 expects (and where gloves fit)

Grades A/B: Sterile gloves are mandatory; regularly disinfect during operations and replace when compromised.
Routine verification: Gloved fingertip sampling (pre/post) during media fills and routine monitoring; trend and act on recoveries.
Isolators/RABS: Use sterile, validated gloves/gauntlets; perform integrity testing at defined intervals and after interventions.
Training & qualification: Operators trained and periodically qualified in gowning and glove sanitization technique, including validated in-use disinfection.

Audit-ready tip: Map each Annex 1 clause related to gowning/gloving into your CCS and link to SOPs for selection, receipt, quarantine, release, in-use disinfection, replacement, EM, and deviations.

3) Materials comparison: sterile latex gloves vs nitrile vs vinyl

Type	Material	Barrier & durability	Chemical compatibility	Tactile sensitivity	Allergen risk	Typical use case
Sterile latex gloves	Natural rubber latex	Excellent elasticity; conforms to fingers	Moderate; avoid strong ketones/aromatics	Highest tactile acuity	Allergy risk (Type I)	Precision aseptic assembly
Sterile nitrile gloves	Synthetic nitrile rubber	High puncture/tear resistance; robust in wet IPA	Good vs many solvents, acids, chemotherapy agents, bases	Very good (slightly less than latex)	Latex-free (Type I & IV), if accelerator-free	Default for high-throughput aseptic lines
Sterile vinyl gloves	PVC	Lowest durability; higher tear risk	Poor–moderate; plasticizer migration risk	Low–moderate	Latex-free	Short tasks in Grades C/D; avoid for Grades A/B

Recommendation: In Annex 1 aseptic areas, favour sterile nitrile for the best overall balance; deploy sterile latex gloves for ultra-precision tasks when allergies are managed; generally avoid vinyl for critical aseptic operations.

4) Sterility & cleanliness specs to put in your URS

Include the following in your User Requirements Specification (URS) for disposable sterile
gloves:

1. Sterility: Gamma irradiation (ISO 11137) validated to SAL 10^-6 provide lot-level Certificate of Sterility and routine dose audit reports.

2. Bioburden & Endotoxin: Pre-sterilisation bioburden limits trended (ISO 11737). Endotoxin 20 EU/pair.

3. Particulate & chemical reporting: Cleanroom-compatible processing/packaging; certificates for NVR/ions; silicone-free options if needed.

4. Physical quality: AQL <= 0.65 for pinholes; tensile strength/elongation per EN/ASTM; powder-free.

5. Design: Length minimum 300–400+ mm; beaded cuffs; ambidextrous or hand-specific; textured fingertips or full-palm texture; high-contrast color for breach detection where appropriate.

6. Packaging & labelling: Cleanroom HDPE, Easy Tear preferred over Peel Pouch, Pair-packed, walleted, double/triple-bagged for unidirectional transfer; clear lot/expiry, irradiation indicator, storage conditions.

7. Documentation: COA/COC/COP per lot (sterility, endotoxin, AQL, particulate); change control notifications; shelf-life and stability data.

5) Double-don strategy & in-use disinfection (with examples)

8. Don gown per SOP; sanitize hands.

9. Don inner sterile glove (e.g., Green).

10. Apply sterile 70% IPA (contact time per label) without over-wetting seams.

11. Don outer sterile glove (e.g., White).

12. Disinfect outer gloves at defined frequency: at entry to Grade B/A, before critical manipulations, after touching non-product-contact surfaces, and every 15–30 minutes (as validated).

13. Replace outer glove if torn/soiled or after defined maximum wear time (e.g., 2–4 hours); replace inner glove per shift or upon compromise.

Isolators/RABS: Define gauntlet maximum use time and integrity test

6) Choosing between sterile nitrile vs sterile latex in Annex 1 operations

Frequent solvent/IPA handling, opt for sterile nitrile.
Microsurgical dexterity needed opt for Consider sterile latex gloves; manage allergy risk, check protein reporting.
High tear/puncture risk opt for Sterile nitrile cuff at 0.10-0.12 mm with textured palm and or fingers.
Extended wear/perspiration opt for Low-modulus sterile nitrile. Avoid inner coatings due to particulation risk.

7) Thickness, cuff length, and texture—how to specify

Thickness: 0.10 mm for tactile acuity; 0.12+ mm for durability.
Cuff length: Minimum 300mm; increasingly 400mm preferred by external auditors where sleeve overlap risk exists.
Texture: Fingertip texture for instruments; full-palm texture for vial/stopper grip in wet IPA.

8) Cleanroom grades and glove policy examples

Grade A: Cleanroom Sterile gloves mandatory; double-don; frequent disinfection; immediate change on compromise; fingertip monitoring per batch/shift.
Grade B: Cleanroom Sterile gloves; routine disinfection; time/event-based changes.
Grades C/D: Risk-based. Cleanroom Sterile gloves when handling sterilized components or open product-contact parts; otherwise high-quality non-sterile gloves acceptable per CCS and SOPs.

9) Compliance pack: what your QA will ask for

Validation packs (full product data, design, testing, packaging)
Vendor Quality Agreement (sterilization, change control, notifications).
Lot CoA/CoC: sterility/SAL, AQL, particulate/endotoxin, physical properties.
Irradiation validation summary and dose audits.
Shelf-life and packaging integrity studies; transit/shipping validation.
Allergen labeling and latex-free statements where applicable.
REACH, Prop 65 ROHS and extractables/leachables statements upon request.

10) Frequently asked questions

Q: Are non-sterile gloves acceptable in any Annex 1 area?

A: In Grades C/D, yes—if risk assessment shows no impact on product sterility and no exposed sterilized parts are handled. In Grades A/B, use sterile gloves.

Q: What AQL should we specify?

A: For aseptic operations, ≤ 0.65 is commonly specified to minimize breach risk; align with risk tolerance and validation data.

Q: Latex vs nitrile for aseptic assembly?

A: If maximum tactile acuity is critical and no latex sensitivity exists, sterile latex gloves perform well. Otherwise, sterile nitrile provides a strong balance with IPA compatibility.

Q: How often should we disinfect gloves?

A: Define frequencies via SOPs (e.g., entry to higher grade, before critical tasks, after touching non-critical surfaces, every 15–30 minutes) and verify via EM trends and media fills.

Q: What about EtO-sterilized gloves?

A: Unacceptable even if vendor meets ISO 11135/10993-7 and provides residual data. EtO implies paper packaging due to sterilization modality, and no paper packaging should be in A/B, C or D environments.

11) Selection matrix and URS template

Process scenario	Recommended glove	Notes
Aseptic filling (wet IPA, stoppering)	Sterile nitrile, textured, cuff 0.10–0.12 mm, 400 mm	Double-don; disinfect frequently
Aseptic micro-assembly	Sterile latex gloves, textured fingertips, 0.10 mm	Confirm no latex sensitivity; monitor fingertip EM
Component prep in Grade B	Sterile nitrile, 300 mm	Outer glove changes at defined intervals
Grades C/D equipment handling	High-quality non-sterile gloves (nitrile), 300 mm	Sterile when handling sterilized parts
Isolator/RABS gauntlet use	Validated sterile gauntlets + disposable sterile gloves (outer layer)	Integrity test gauntlets; event/time-based outer-glove changes

URS excerpt you can paste into procurement brief:

Disposable sterile gloves, SAL 10^-6 (gamma preferred), AQL <= 0.65, endotoxin <= 20 EU/pair.
Material: nitrile (primary); latex option for precision tasks; vinyl excluded for Grades A/B.
Powder-free, low NVR/ions; pair-packed, walleted, double-bagged.
Length >= 300 mm (>= 400 mm where indicated); textured fingertips/palm.
Lot documentation: CoA (sterility, AQL, endotoxin, particulate), irradiation certificate, expiry, storage.
Standards: ISO 11137/11135/10993-7, ISO 11737, EN 455/ISO 21420, EN ISO 374 (where applicable).
Supplier QA: change control, CoA availability within 24 h, annual review meeting.

12) Common pitfalls and how to avoid them

Specifying only “sterile gloves” without AQL/endotoxin/cleanliness criteria. Request Sterile Cleanroom Gloves.
Single-don policy in aseptic filling instead of double-don with contrasting colors.
Ignoring cuff length leading to wrist/forearm exposure during reach-in tasks.
Unvalidated disinfection frequency (too infrequent or excessive).
Latex sensitivity not managed with alternatives and surveillance.
Mixing brands/lots within a shift complicating deviations and trending.

13) How Isofield helps (and what to ask us for)

Isofield — Leading Manufacturer of Sterile Gloves

Disposable sterile gloves with SAL 10^-6, AQL <= 0.65, low endotoxin, and cleanroom-ready pair-packed, walleted, double-bagged presentation.
Options: sterile nitrile (standard and high-dexterity, white and Green for color contrast), sterile latex gloves for precision tasks, and controlled non-sterile gloves for Grades C/D per risk assessment.
Full lot traceability and CoA delivery with each shipment.

Evaluation support: Request our free sample kit (nitrile + latex variants, 300/400 mm, textured options). Our technical team will help align SOPs for double-don and in-use disinfection to Annex 1 expectations.

14) Glossary (quick refresher for QA and Operators)

AQL: Acceptance Quality Limit; lower value = tighter pinhole control.

CCS: Contamination Control Strategy; site-wide plan integrating gowning/gloving controls.

Endotoxin: Pyrogenic LPS; gloves for aseptic work should have low EU/pair levels.

IPA: Isopropyl alcohol; generally use 70/30 sterile product for glove disinfection.

SAL: Sterility Assurance Level; probability of a non-sterile unit (10^-6 for terminal sterilization).

URS: User Requirements Specification; your technical purchase spec.

Four quick and crucial facts about cleanrooms

Kanya — Tue, 18 Nov 2025 04:36:46 +0000

1. What is a cleanroom?

According to the ISO14644-1 (International Standards Organisation), a cleanroom is a room where the number of airborne particles is controlled and classified and which is designed, constructed and operated in a manner to control the introduction, generation and retention of particles inside the room.[1] In other words, cleanrooms are rooms in which environments are controlled for critical activities.

2. How to determine cleanroom class?

Cleanroom classes are categorized by the number of airborne particles allowed in each room. The less airborne particles present, the cleaner the room. Levels of cleanroom are expressed in terms of an ISO Class, which represents maximum allowable concentrations of particles in a unit volume of air. ^[1]

Table 1 – ISO Classes of air cleanliness by particle concentration

a. All concentrations in the table are cumulative. e.g. for ISO Class 5, the 10,200 particles shown at 0.3 µm include all particles equal to and greater than this size.

b. These concentrations will lead to large air sample volumes for classification. A sequential sampling procedure may be applied; (see [1] page 33).

c. Concentration limits are not applicable in this region of the table due to very high particle concentration.

d. Sampling and statistical limitations for particles in low concentrations make classification inappropriate.

e. Sample collection limitations for both particles in low concentrations and sizes greater than 1 µm make classification at this particle size inappropriate, due to potential particle losses in the sampling system.

f. In order to specify this particle size in association with ISO Class 5, the macroparticle descriptor M may be adapted and used in conjunction with at least one other particle size. (see [1] page 26)

g. This class is only applicable for the in-operation state.

3. What is a cleanroom used for?

Cleanroom environments are highly controlled. The main function of these extremely clean areas is to help manage and mitigate particle contamination generated by people, products and processes. In Life Sciences, cleanrooms are used to produce injectables like vaccines, ingestible like tablets as well as implantable like pacemakers. In short, industries which make pharmaceuticals, medical devices and other biotech products will use a cleanroom as a critical component in their day-to-day working environment.

4. How to control contamination in a cleanroom?

Humans are by far the biggest source of contamination in any cleanroom. Our every movement generates particles. The goal is to always ensure that we do not unnecessarily introduce particles into a cleanroom environment. A large part in controlling particles in environments is through the proper selection of consumables used by personnel working in the cleanroom. Every piece of PPE (Personal Protective Equipment) used must be selected to ensure it minimises the ingress of particles into the Cleanroom. In fact, the EU GMP Annex 1: Manufacture of Sterile Medicinal Products outlines the criteria necessary for the consideration and selection of Cleanroom PPE depending on the classification of the environment [1]

Isofield’s range of PPE consumables are compatible for both ISO Class 4 or ISO Class 5 cleanrooms. Technical reports are available to confirm the cleanliness of our products and are available upon request.

References

[1] “Cleanrooms and associated controlled environments – Part 1: Classification of air cleanliness by particle concentration.” <https://zoser.com.co/wp-content/uploads/2015/10/ISO%2014644-1%20Version%202015.pdf> Accessed July 2, 2021

Five techniques to maintain sterility: FDA Guidance

Kanya — Tue, 18 Nov 2025 04:03:47 +0000

STERILE DRUG PRODUCTS PRODUCED BY ASEPTIC PROCESSING —CURRENT GOOD MANUFACTURING PRACTICE

The FDA guide is intended to help manufacturers meet the requirements in the Agency’s Current Good Manufacturing Practice (CGMP) regulations (2l CFR parts 210 and 211) when manufacturing sterile drug and biological products using aseptic processing.

1. Contact sterile materials only with sterile instruments

Sterile cleanroom gloves should be regularly sanitized or changed, as appropriate, to minimize the risk of contamination after initial gowning to minimize contamination risks.

2. Move slowly and deliberately

Rapid movements can create an unacceptable turbulence in a critical area. Such movements can present challenges to the intended cleanroom design and control parameters that needs to be maintained while housing sterile products. The principle of slow, careful movement should be followed throughout the cleanroom.

3. Keep the entire body out of the path of unidirectional airflow

Unidirectional airflow design is used to protect sterile equipment surfaces, container closures and product. Disruption of the path of unidirectional flow air in the critical area can pose a risk to product sterility.

4. Approach a necessary manipulation in a manner that does not compromise sterility of the product

To maintain sterility of nearby sterile materials, a proper aseptic manipulation should be approached from the side and not from above the product (in vertical unidirectional flow operations). Also, operators should refrain from speaking when in direct proximity of the critical area.

5. Maintain proper gown control

Prior to and throughout aseptic operations, an operator should not engage in any activity that poses an unreasonable contamination risk to the gown. The gown should provide a barrier between the body and exposed sterilized materials and prevent contamination from particles generated by, and microorganisms shed from, the body.

The Agency recommends gowns that are sterilized and non-shedding, and covering the skin and hair (face-masks, hoods, beard/moustache covers, protective goggles, and elastic gloves are examples of common accessories to gowns). Written procedures should detail the methods used to don the gown and each of the accessories in an aseptic manner. An adequate barrier should be created by the overlapping of gown and accessories (e.g., gloves overlapping sleeves). Gloves should also be sanitized regularly.

*Content has been adapted from the FDA Guidance Document. Original document here: https://www.fda.gov/regulatory-information/search-fda-guidance-documents/sterile-drug-products-produced-aseptic-processing-current-good-manufacturing-practice

Considerations in selecting arm protection for vaccine manufacturing

Kanya — Tue, 18 Nov 2025 03:35:16 +0000

Vaccine production dates back to the 1700’s. Today thankfully, vaccines are commonplace and highly effective. With the recent SARS-CoV-2 outbreak, many have benefited directly from this life-saving technology.

Vaccine production can present serious risks to patients if not managed carefully. The manufacture of vaccines and similar biologics are carried out in ISO Class 5, Grade A environments. This means that not only must the area be mostly free of particles, but also effectively sterile. Constant vigilance and process control is critical as contaminants can still be introduced into these cleanrooms, usually coming from bulk material and equipment, but primarily from cleanroom operators. (1)

Below are the considerations to make when selecting gloves for vaccine manufacturing:

Length of gloves

300mm (12”) length gloves still remain the most widely used length of gloves in sterile environments today. The trend, however, is shifting to a 400mm (16”) length glove. Many regulatory agencies stress the need to provide adequate forearm coverage by properly overlapping gloves on the gown sleeves. A 400mm (16”) glove ensures that the entire forearm is covered thereby reducing the risk of skin exposure. A longer length, depending on material and thickness, may also provide protection to operators who work with harmful chemicals or pathogenic strains.

Double gloving

Smooth inner glove
If you are double gloving, you need to ensure that the 1st pair (inner pair) of gloves you put on has a smooth outer surface to aid the donning of the 2nd glove on top.

Length of inner glove and outer glove
A 300mm (12”) glove is commonly used as the inner glove while a 400mm (16”) glove is used as the outer glove to provide maximum coverage. In many instances end users may also choose a 400mm (16”) inner glove as well as a 400mm (16”) outer glove.

Sterility of gloves
This decision depends on each company’s SOP. Some companies will have a protocol which mandates a non-sterile inner glove (sanitized with some form of alcohol or sporicidal biocide), with a sterile glove on top, or simply one sterile glove on top of another sterile glove.

Colour

Using contrasting inner and outer gloves helps operators to visually detect punctures or tears triggering an immediate glove change to avoid any contamination risk.

GLOVE polymer coating

It is imperative to ensure that gloves selected for vaccine manufacturing are not polymer coated. Polymer coated gloves will generate particles contributing to process contamination when used. Opt for gloves from your suppliers that have been chemically treated to make them smooth and powder-free as this process leaves no residues or loose particles which can be introduced into your cleanroom.

Also important: sterility

As vaccine manufacturers, it is critical to validate the sterility of the gloves which you have received from your suppliers. Request from them documents which prove the sterility of the product, in particular the sterility validation file. Ensure that suppliers are also able to provide routine dose audit documents for the gloves to ensure the glove you are using are still appropriate regardless of the regularity of their production (2)

Isofield manufactures 600mm (24″),400mm (16″) and 300mm (12″) sterile gloves which are suitable for use in aseptic / sterile environments (Grade A/ISO Class 5). We can guide you in the selection of the suitable hand and arm protection after considering your processes and systems. Get in touch with us to find the right gloves for your vaccine manufacturing.

References

“Environmental Monitoring of Clean Rooms in Vaccine Manufacturing Facilities: Points to consider for manufacturers of human vaccines.” <https://dcvmn.org/wp-content/uploads/2016/03/who_env_monitoring_cleanrooms_final_2_.pdf>. Accessed July 5, 2021.
“Method 1 Quarterly Dose Audits: Interpretation Of Results” <https://www.steris-ast.com/techtip/method-1-quarterly-dose-audits-interpretation-results/ >. Accessed July 5, 2021