GHS Label Requirements: The Complete 2026 Guide

A GHS label is the single most visible point of chemical hazard communication. It is the first thing a worker sees when they pick up a container, and in regulatory terms it is the legal interface between the chemical you supply and the person who handles it. Getting it right is not optional: in the United States it is enforced by OSHA, and across the European Union it is enforced under the CLP Regulation. Getting it wrong means non-compliant product, rejected shipments, and avoidable risk to the people downstream.

This guide explains exactly what must appear on a compliant GHS label, why each element exists, and where the two largest regulatory systems — the US OSHA Hazard Communication Standard (HCS) and the EU CLP Regulation — agree and where they diverge. It is written as a reference, not a sales page. Where you eventually need to buy physical labels, our supplier directory covers vetted options, but the requirements below apply no matter who prints them.

What is a GHS label?

GHS stands for the Globally Harmonized System of Classification and Labelling of Chemicals, a framework adopted by the United Nations to standardize how chemical hazards are classified and communicated worldwide. Before GHS, a single chemical could carry completely different warnings depending on the country it was sold in. A flammable solvent might show one symbol in the US, another in Japan, and yet another in Germany. GHS replaced that patchwork with one consistent visual and textual language.

A GHS label is the container-level expression of that system. It takes the hazard classification of a substance or mixture and presents it through a fixed set of standardized elements — symbols, words, and statements — so that anyone, anywhere, can read the same warnings the same way. The system is now used in more than 80 countries, each implementing it through their own national or regional law. In the US that law is OSHA’s HCS; in the EU it is CLP.

It is worth being precise about scope from the start. A GHS label is a hazard communication tool, not a complete information document. It tells you that a chemical is dangerous and how to handle it safely in summary form. The full technical detail — composition, toxicological data, first-aid measures, disposal — lives on the safety data sheet (SDS), a separate 16-section document. The label and the SDS work together but are not interchangeable. This distinction matters, and it is the source of some of the most common questions about what does and does not belong on a label.

The 6 required GHS label elements

Every compliant GHS label is built from the same six mandatory elements. These are standardized: a label preparer cannot invent their own symbols or substitute their own wording for the official statements. The aim of harmonization is that the intended audience can recognize and understand the information instantly, regardless of who manufactured the chemical.

Element	What it is	Example
Product identifier	The name or code that uniquely identifies the chemical and links the label, the SDS, and the inventory list	”Acetone” or a product code
Signal word	A single word indicating relative severity	”Danger” (severe) or “Warning” (less severe)
Hazard pictogram(s)	Standardized red-bordered diamond symbols showing the hazard type	Flame, skull and crossbones, corrosion
Hazard statement(s)	Standardized phrases describing the nature and degree of hazard	”Highly flammable liquid and vapour” (H225)
Precautionary statement(s)	Standardized phrases on prevention, response, storage, and disposal	”Keep away from heat” (P210)
Supplier identification	Name, address, and telephone number of the manufacturer, importer, or distributor	Company contact block

Product identifier

The product identifier is the anchor of the whole system. It is the name or number used for the chemical on both the label and the SDS, and it provides the unique means by which a user can cross-reference the label, the SDS, and the workplace inventory of hazardous chemicals. For a single substance it is typically the chemical name; for a mixture it may be a trade name or product code, provided that same identifier appears on the corresponding SDS.

Signal word

There are only two signal words in GHS, and a label uses at most one. “Danger” is reserved for the more severe hazard categories; “Warning” is used for the less severe ones. If a chemical’s classification would call for both across different hazard classes, only the single most severe signal word — “Danger” — appears. A chemical whose hazards fall entirely into the lowest categories may carry no signal word at all.

Hazard pictograms

Pictograms are the most recognizable part of a GHS label: a black hazard symbol on a white background inside a red diamond frame set on its point. GHS defines nine pictograms in total. In the US, OSHA’s HazCom Standard uses eight of them — the ninth, the environmental hazard pictogram, is not mandated by OSHA because environmental hazards fall outside OSHA’s workplace-safety jurisdiction, though it is used under the EU’s CLP system. The red frame is not decorative; a printed-black-only diamond with no red border does not satisfy the requirement.

Hazard statements

Hazard statements are standardized phrases assigned to each hazard class and category. Each carries an “H” code — for example, H225 for “Highly flammable liquid and vapour” or H314 for “Causes severe skin burns and eye damage.” The wording is fixed by the standard. A preparer must use the exact assigned statement for each applicable hazard rather than paraphrasing it.

Precautionary statements

Precautionary statements describe recommended measures to minimize or prevent adverse effects. They are grouped into four types — prevention, response, storage, and disposal — and each carries a “P” code, such as P210 (“Keep away from heat”). This is the one element where preparers have some flexibility: statements can be combined for readability, and as we will see, the EU’s CLP Regulation places a numerical limit on how many can normally appear.

Supplier identification

The label must identify who is responsible for the product: the name, address, and telephone number of the manufacturer, importer, or other responsible supplier. This gives downstream users a direct line back to the source for questions, the SDS, or emergencies.

What is NOT a required GHS label element

One of the most-searched questions about GHS labels is which element is not required — and it is worth answering clearly, because confusion here is common.

Several pieces of information that frequently appear on chemical containers are not mandatory GHS elements. The CAS number, the chemical’s expiration date, recommended PPE icons, net contents or volume, and NFPA or HMIS rating diamonds are all examples. None of these is one of the six required elements. They may be added as supplemental information — OSHA explicitly permits supplemental content such as directions for use or net contents — but they are optional, and supplemental information must not contradict or cast doubt on the required elements.

The NFPA and HMIS systems deserve a specific note because they are so widespread in US facilities. OSHA continues to allow NFPA and HMIS rating systems on labels and SDSs as supplemental information, provided they remain consistent with the current HCS requirements. But they are an addition to a GHS label, never a substitute for one. A container that shows only an NFPA diamond is not GHS-compliant.

Equally, certain things are simply not found on a GHS label at all because they belong elsewhere. The full safety data sheet, the complete composition of a mixture with exact percentages, and transport placards (DOT in the US, IMDG for sea freight) are not label elements. The detailed data lives on the 16-section SDS; transport markings follow a separate set of rules for shipping. The container label carries the six required hazard-communication elements and, optionally, supplemental information — nothing more is mandated.

OSHA HCS requirements (United States)

In the US, GHS is implemented through OSHA’s Hazard Communication Standard, 29 CFR 1910.1200. OSHA first adopted GHS provisions in 2012, introducing the 16-section SDS, the standardized label elements, and harmonized classification criteria.

The most important recent development is the 2024 update. On May 20, 2024, OSHA published a Final Rule (89 Fed. Reg. 44,144) revising the HCS to align it primarily with the 7th revised edition of GHS. The rule took effect on July 19, 2024, but the compliance dates that actually matter to manufacturers are phased:

• January 19, 2026 — compliance deadline for substances (chemical manufacturers, importers, and distributors who classify and label).
• July 19, 2027 — compliance deadline for mixtures.

The substance deadline has now passed, which means any single-substance chemical placed on the US market should already carry labels meeting the updated HCS. The mixture deadline is still ahead. If you supply mixtures into the US, this is the date to plan against.

The 2024 update did more than bump a version number. It revised hazard classification criteria (including changes to skin corrosion, flammable gases, desensitized explosives, and aerosols), codified OSHA’s existing interpretations on labeling very small containers, and clarified rules for GHS labels on bulk chemical shipments. For most label preparers the practical effect is that hazard statements, precautionary statements, and classifications need to be reviewed against Revision 7 rather than the older Revision 3 baseline.

A point that trips up many US facilities: laboratory chemicals are regulated separately. The HazCom Standard that incorporates GHS does not govern labeling inside laboratories — those fall under the Occupational Exposure to Hazardous Chemicals in Laboratories Standard, 29 CFR 1910.1450. If your operation is a lab rather than a manufacturing or distribution environment, the labeling regime is different.

CLP requirements (European Union)

In the EU, GHS is implemented through the CLP Regulation (EC) No 1272/2008 — Classification, Labelling and Packaging. CLP has applied since January 20, 2009, becoming compulsory for substances from December 2010 and for mixtures from June 2015. It works alongside REACH and replaced the older EU directives on dangerous substances and preparations.

A CLP label carries the same core GHS elements as an OSHA label — product identifier, pictograms, signal word, hazard and precautionary statements, supplier details — but CLP layers several EU-specific rules on top. These differences are exactly the kind of label-specific detail that catches suppliers expanding from the US market into Europe.

Language of the destination country

This is the single biggest practical difference from OSHA. A CLP label must be written in the official language(s) of each member state where the product is placed on the market. A chemical sold in France, Germany, and Poland needs label text in French, German, and Polish respectively — and often all on one multilingual label. There is no single “EU English” label that satisfies CLP across the bloc. This is one of the most demanding aspects of EU labeling and a major reason multilingual label printing is a specialist service.

The six-precautionary-statement rule

CLP applies a numerical limit that OSHA does not: as a general rule, no more than six precautionary statements should appear on a label unless more are necessary to reflect the nature and severity of the hazards. This forces preparers to prioritize the most relevant precautions rather than listing every possible statement, which keeps labels legible.

Small packages

CLP recognizes that very small containers cannot physically carry a full label. For packages of 125 mL or less, certain GHS label elements may be omitted under defined conditions. This is a pragmatic allowance, not a blanket exemption — the rules specify which elements can be dropped and when.

UFI and poison centre notification

For hazardous mixtures, CLP requires a Unique Formula Identifier (UFI) on the label, tied to the poison centre notification (PCN) system. The harmonized PCN format under Annex VIII became fully mandatory in January 2025. The UFI is a 16-character code that lets poison centres identify the exact formulation in an emergency. This requirement has no direct OSHA equivalent.

Harmonized classification under Annex VI

CLP’s Annex VI contains legally harmonized classification and labelling for thousands of hazardous substances. Where a substance appears in Annex VI, suppliers must apply that harmonized classification — they cannot self-classify more leniently. CLP’s classification criteria are currently aligned with UN GHS Revision 5 (8th ATP), and the annexes are updated roughly yearly through Adaptations to Technical Progress (ATPs). Because ATPs can change classification criteria and hazard statements even when your formulation has not changed, labels need periodic review against the current ATP.

Secondary container labels

A frequent source of confusion is the secondary container — a container into which a chemical has been transferred from its original packaging, such as a spray bottle, beaker, or smaller drum filled from a bulk supply.

Under OSHA’s HCS, secondary containers used in the workplace still need to be labeled, but employers have some flexibility. The secondary container can carry the full GHS label, or it can use an alternative in-house labeling system (such as a workplace-specific label) provided that system conveys the same hazard information and employees are trained to understand it. The key principle is that no worker should ever encounter an unlabeled container of hazardous chemical.

There is one important exception in the US: a container is exempt from labeling if it holds a chemical transferred from a labeled container that is intended only for the immediate use of the worker who made the transfer, within that worker’s shift. The moment a transferred chemical is stored, left for another shift, or handled by someone else, a label is required.

If a chemical is dispensed from a bulk container into a second package for distribution rather than immediate use, that secondary package must be properly labeled with full GHS elements — it is now a labeled product entering the supply chain, not a transient workplace container.

Hazardous vs non-hazardous chemicals

GHS labeling requirements are triggered by hazard classification, not by the mere fact that something is a chemical. Both OSHA HCS and CLP apply to substances and mixtures that meet defined hazard criteria — physical hazards (flammable, explosive, oxidizing), health hazards (toxic, corrosive, carcinogenic), and, under CLP, environmental hazards.

A chemical that does not meet any hazard classification criteria is not subject to the GHS hazard-communication elements. It does not need pictograms, a signal word, or H/P statements, because there is no classified hazard to communicate. Water, for the obvious example, requires no GHS hazard label.

That said, “not hazardous” is a classification conclusion, not an assumption. The responsibility sits with the manufacturer or importer to evaluate the available data and determine whether a substance or mixture meets any classification criteria. Concluding that a product is non-hazardous is itself a regulatory decision that should be documented. And even for a genuinely non-hazardous product, a clear product identifier and supplier details remain good practice and may be required under other product-specific legislation.

Putting it together: a compliance checklist

For a substance or mixture you are placing on the market, a compliant label workflow looks like this:

1. Classify the substance or mixture against the applicable criteria — HCS (GHS Rev 7) in the US, CLP (and Annex VI where listed) in the EU.
2. Assemble the six required elements based on that classification: product identifier, signal word, pictogram(s), hazard statement(s), precautionary statement(s), supplier identification.
3. Apply jurisdiction-specific rules — English and Rev 7 for OSHA; destination-country languages, the six-P-statement rule, small-package allowances, and UFI for CLP.
4. Choose a durable label material appropriate to the chemical and the environment. Aggressive solvents, outdoor storage, and marine transport each impose physical demands on the label stock and adhesive — a topic covered in the BS5609 standard for drum labels shipped by sea.
5. Review periodically. OSHA’s Rev 7 deadlines and CLP’s annual ATPs both change requirements over time, independent of any change to your formulation.

Where you need to source physical labels that meet these requirements, our vetted supplier directory covers options across the US, EU, and UK, with each profile honest about its certifications and limitations. For the underlying regulatory theory — how classification works, the full pictogram set, and the SDS — the sibling resources at ghspictograms.com and ghssymbols.com go deeper than a label-focused guide can.

A GHS label looks simple, and that is the point: six standardized elements, instantly recognizable. But the simplicity on the container hides a precise set of rules underneath, and those rules differ enough between jurisdictions that “compliant in the US” does not mean “compliant in the EU.” Knowing exactly which six elements are required — and which common additions are merely optional — is the foundation everything else builds on.