EN ISO 21420 vs EN 420: The General Requirements Standard Behind Every CE-Marked Safety Glove

What EN ISO 21420 Actually Is — and What It Is Not

Ask ten glove importers what standard matters most and nine will say EN 388. It is the number printed largest on the packaging, the one buyers negotiate over, the one that gets quoted in tender documents. Yet EN 388 is legally meaningless on its own. Underneath it sits a quieter standard that decides whether the glove is allowed to exist in the European market at all: EN ISO 21420:2020, Protective gloves — General requirements and test methods.

EN ISO 21420 is what standards bodies call a horizontal standard. It applies to every protective glove regardless of material, thickness, price or end use — disposable nitrile examination gloves, 13-gauge PU-coated assembly gloves, welding gauntlets, chainmail butcher gloves, cryogenic mitts, even arm protectors, pot holders and gloves permanently built into containment enclosures. Its scope covers five things:

• Design and construction — the glove must not restrict the wearer unnecessarily, seams must not reduce performance, and multi-layer gloves must not separate during donning and doffing
• Innocuousness — the glove itself must not harm the person wearing it
• Comfort and efficiency — dexterity, sizing, water vapour transmission
• Care and cleaning — performance must survive the stated number of wash cycles
• Marking and information supplied by the manufacturer

What it explicitly does not do is measure protection. There is no cut level, no permeation breakthrough time, no contact heat rating anywhere in the document. That is deliberate. EN ISO 21420 answers the question "is this a legitimate, safe, wearable, correctly labelled glove?" while the specific standards answer "what does it protect against, and how well?"

How it maps onto the standards you already specify

If you sell into the EU, the legal umbrella above all of this is Regulation (EU) 2016/425. We break the certification routes, notified body modules and importer obligations down in our EU PPE Regulation 2016/425 guide.

EN 420 to EN ISO 21420: What Changed in 2020

EN ISO 21420:2020 was published in early 2020 and became the harmonised reference from October 2020, superseding EN 420:2003+A1:2009. Because ISO adopted the same text, the requirements are now effectively global — useful leverage when consolidating one specification across EU, Gulf, African and Southeast Asian customers.

Five changes matter commercially:

1. Minimum glove length was deleted. EN 420 published minimum lengths per size; EN ISO 21420 does not. Length is now driven by the application standard — welding gauntlets under EN 12477 still carry length requirements. The practical consequence: you must specify cuff length in the purchase order, because the standard no longer does it for you.

2. Manufacturing date became mandatory. Every glove (or its first packaging, where marking the glove is impossible) must show at least the month and year of manufacture, plus an obsolescence date behind the hourglass pictogram where relevant. That is a traceability win — it makes shipping four-year-old warehouse stock as current production much harder.

3. Chemical restrictions were tightened and extended. PAHs and DMFa were brought in explicitly, alongside the pre-existing Chromium VI, pH, nickel and azo colorant limits. See the next section.

4. Electrostatic properties got a proper route. EN ISO 21420 now points explicitly to EN 16350 (test method EN 1149-2) for gloves intended for explosive atmospheres, and introduced the corresponding pictogram. Claims based on EN 1149-1 or EN 1149-3 surface resistivity alone are not sufficient for ATEX use — a distinction many suppliers still get wrong. Our anti-static glove guide covers the test-method trap in detail.

5. Dexterity became a graded five-level scale reported consistently, rather than the looser treatment under the old standard.

A further amendment, EN ISO 21420:2020+A1:2024, has since been issued, refining test-method references and editorial clauses. From 2026 onward, ask whether the laboratory report cites the amended version — a supplier who cannot answer that has almost certainly not re-tested since 2020.

Innocuousness: The Six Chemical Limits That Stop Shipments

Innocuousness is the clause that fails the most product, and the one buyers understand the least. The logic is straightforward: a glove is worn against skin for eight hours a day, often damp with sweat, so the glove must not itself be a chemical exposure. Six limits apply, each tied to a specific material rather than to the glove as a whole — which means each material in a composite glove is tested separately.

Where failures actually cluster

pH drift on cheap dipped gloves. Latex and nitrile dipping lines use alkaline coagulants. When a factory shortens the post-dip leaching and rinsing cycle to raise throughput, residual alkalinity stays in the film and pH climbs above 9.5. It costs nothing to fix, so check it on every new supplier's first production run — it is also the leading cause of the contact dermatitis complaints distributors receive months after delivery.

DMFa in PU-coated gloves. DMFa is the solvent used to dissolve polyurethane resin for coating. Proper curing drives it off; rushed drying tunnels leave it in the film. Because 13-gauge PU-coated gloves are the highest-volume industrial glove category worldwide, this is the largest exposure risk in most catalogues — see our PU-coated glove guide for how coating weight and curing interact.

Chromium VI in chrome-tanned leather. Trivalent chromium used in tanning can oxidise to hexavalent chromium during storage, especially in the hot, humid warehouses that describe most ports in West Africa and Southeast Asia. A leather glove can pass at the factory and fail after ten weeks in a container. Specify chrome-free or low-chrome tanning for tropical destinations.

Azo dyes in bright-coloured shells. Hi-vis orange, red and deep navy are the usual offenders, because the cheapest dyes in those shades are the ones most likely to release restricted amines. Budget slightly more for compliant dyestuff on hi-vis specifications.

Dexterity Levels 1–5: The Pin Test Explained

The dexterity test is refreshingly physical. A wearer, gloved, must pick up a steel pin three separate times within a minimum period of 30 seconds. The level awarded corresponds to the smallest pin diameter they can manage. That is the whole test — no instrumentation, no interpretation.

Dexterity is where procurement decisions quietly succeed or fail. A Level 1 or 2 glove issued to workers handling M6 bolts, cable connectors or barcode scanners will simply be removed — and a removed glove protects nothing. Unexplained consumption spikes on cut-resistant SKUs almost always trace back to a dexterity mismatch: workers cut the fingertips off, then request replacements sooner.

Practical specification rule: if the smallest component a worker routinely handles is under 8 mm across, specify dexterity Level 4 minimum in your tender. It is a single line of text and it eliminates the most common cause of glove-programme failure. For tasks involving touchscreens and handheld terminals, pair that with the conductive-fingertip options covered in our haptic and touch screen glove guide.

Sizing and Hand Measurement: Why "One Size Ships" Fails

EN ISO 21420 defines glove size by the hand the glove is intended to fit, not by the glove's own dimensions. The standard covers sizes 4 to 13; commercially, 6 to 11 covers almost all industrial demand. Two measurements determine compliance: hand circumference around the palm excluding the thumb, and hand length from the wrist crease to the middle fingertip.

The compliance point most traders miss: a glove sold as "EN ISO 21420 compliant" in a single universal size is not compliant, because the standard requires the size range to be declared and the declared sizes to match real hand dimensions. A supplier shipping only sizes 9 and 10 while claiming 7–11 on the insert breaches the marking clause even if every chemical test passes.

For a full measuring procedure your customers can follow, including a printable measurement guide, see our glove size and fit guide.

Breathability, Washing and ATEX Electrostatic Properties

Water vapour transmission. Gloves worn for more than short periods must allow moisture to escape, or be declared impermeable — leather is assessed for water vapour permeability, textile assemblies for evaporative resistance under ISO 11092. This is why fully-dipped disposable and chemical gloves become uncomfortable across a full shift: they score poorly by design. Where full-shift wear is unavoidable, specify a breathable knitted shell with a partial coating rather than a full dip.

Cleaning and washing. If a manufacturer provides cleaning instructions, performance tests must be run before cleaning and again after the maximum recommended number of cycles, and the glove marked with the lower result. This clause is routinely ignored. If a datasheet claims "machine washable, 5 cycles" but the EN 388 report shows only pre-wash results, the wash claim is unsupported — always demand post-wash data for laundered glove programmes.

Electrostatic properties and ATEX. For work in explosive atmospheres, EN ISO 21420 directs you to EN 16350, tested by the EN 1149-2 vertical resistance method, and permits the associated pictogram only on that basis. Surface resistivity results from EN 1149-1 or decay results from EN 1149-3 are not equivalent and do not license the ATEX pictogram. If you supply refineries, fuel depots, grain handling or petrochemical sites, this single distinction is worth verifying line by line — details in our ESD and cleanroom glove guide.

Marking and Information Supplied by the Manufacturer

Marking is the cheapest clause to comply with and the most frequently breached, because it happens at the packaging stage — often subcontracted, often rushed. Every protective glove must carry:

• Manufacturer's name or identifying mark
• Glove designation (the model code)
• Size designation
• Pictograms for each applicable standard, with the standard reference and performance levels
• Date of manufacture, at minimum month and year
• Obsolescence date behind the hourglass pictogram, where applicable
• CE mark

Where the glove is too small or too thin to be marked — disposables, for instance — the information must appear on the first packaging enclosure.

The user instructions must additionally cover the manufacturer's name and address, the full size range with its reference sizing system, intended use with relevant standards, the PPE hazard category (I, II or III), care and storage instructions, use limitations, warnings, and the notified body that certified the product. A natural rubber latex warning is mandatory where applicable. Instructions must be in the official language of the destination market — which catches out plenty of shipments into francophone West Africa, Brazil and Indonesia, where an English-only insert is technically non-compliant.

How to Verify a Real EN ISO 21420 Report in 15 Minutes

You do not need a compliance department to catch recycled documentation. These five checks take about a quarter of an hour per supplier and filter out most problem files before you place a deposit.

1. Match the model code across every document. Compare the model code on the EN ISO 21420 report character by character with the performance report, the EU type-examination certificate and the Declaration of Conformity. Mismatched or "similar" codes are the single most common red flag — a borrowed certificate almost always shows itself here.

2. Check the standard edition and report date. The report should cite EN ISO 21420:2020, ideally the 2020+A1:2024 amendment. An EN 420 citation on a post-2022 report means the file is stale, and usually belongs to an older model.

3. Confirm all six innocuousness results are present, not just pH. Many suppliers submit a partial file with pH and Chromium VI only. If the glove contains PU, DMFa must be there; if it has rubber or plastic in skin contact, PAHs must be there. Missing results are not implied passes.

4. Verify the notified body actually exists. Category II and III gloves need EU type examination. Take the four-digit notified body number from the certificate and confirm it in the European Commission's NANDO database, checking that the body is listed for Regulation (EU) 2016/425 and for gloves specifically. Numbers that belong to a body accredited for a different product family are a familiar trick.

5. Ask for photographs of the actual marking and insert — not renders or artwork files, but production packaging. Compare the declared size range against what is physically in the carton, and confirm the insert language matches the destination market.

What This Means for Distributors in Africa, SE Asia and Latin America

If you distribute into markets that reference European standards — and most of West Africa, East Africa, the Gulf, Southeast Asia and much of Latin America write EN 388 and CE marking directly into tender documents — then EN ISO 21420 is your quiet competitive advantage, for three reasons.

It wins tenders. Large industrial and government tenders increasingly ask for the general requirements report alongside the performance report. Bidders who can only produce an EN 388 certificate get disqualified on documentation, not on product.

It protects your margin against the bottom of the market. The cheapest imported gloves in Lagos, Nairobi, Jakarta and Manila compete purely on unit price, and the corners they cut are precisely the EN ISO 21420 clauses — short leaching cycles, uncured PU, undeclared size ranges, no manufacturing date. A complete compliance file shifts the conversation from price per pair to cost per compliant pair, the same argument we make quantitatively in our cost-per-wear analysis.

It reduces your own liability. Under EU rules the importer carries obligations; in many other jurisdictions the local distributor does. If a worker develops dermatitis from an out-of-range pH glove, the paper trail leads to whoever placed it on the market. A complete file per model, filed per shipment, is inexpensive insurance.

At ExPedSafety we test to EN ISO 21420:2020 as standard for every model in the export catalogue, not as a paid extra, and we supply the full document set — general requirements report, specific performance report, type-examination certificate, Declaration of Conformity and marking photographs — with the first shipment of every new SKU. Browse the current range in the product catalogue, review MOQ and FOB terms on the wholesale programme page, or check common sourcing questions in our FAQ. For a broader view of what changes in hand protection procurement this year, see the 2026 safety glove buyer's guide, and browse every standards explainer in the blog index.