Hazardous communication label requirements: what every employer must know

Last updated 2026-07-09

What is a hazardous communication label and why does OSHA require it?

A hazardous communication label is the physical or electronic tag on a chemical container that tells anyone handling it what the chemical is, what dangers it carries, and what to do if something goes wrong. OSHA's Hazard Communication Standard (HazCom 2012), found at 29 CFR 1910.1200, requires these labels on nearly every hazardous chemical sold or used in American workplaces ^[1].

OSHA rewrote the standard in 2012 to line up with the United Nations Globally Harmonized System of Classification and Labelling of Chemicals (GHS). Before that, labeling varied by manufacturer. It was genuinely hard for a worker to know whether the skull-and-crossbones on one drum meant the same thing as the skull on the drum sitting next to it. GHS fixed that with standardized pictograms, signal words, and statement language.

Here's the practical point. If a worker picks up an unlabeled container and gets hurt, OSHA's first question at inspection is where the label went. The employer is on the hook for maintaining labels on secondary containers and making sure nobody removes or covers the original. That's no technicality. It's the whole point of the system.

For a broader look at how the labeling rule fits into the full hazard communication program, including safety data sheets and training, see our in-depth guide on that topic.

What are the 6 required elements on a GHS hazard communication label?

OSHA spells out the six required label elements at 29 CFR 1910.1200(f)(1) ^[1]. Every element has a defined purpose. Here they are, in plain terms:

1. Product identifier. The chemical name, code, or batch number that matches what appears on the Safety Data Sheet (SDS). This is how workers and emergency responders look up detailed information fast.

2. Signal word. Either "Danger" (more severe hazard) or "Warning" (less severe). Only one signal word appears per label, and the choice is dictated by the chemical's hazard classification. A product with both acute toxicity and flammability gets one signal word covering the worst category.

3. Hazard statements. Standardized phrases that describe the nature and degree of the hazard. Examples: "Causes serious eye damage" or "May cause drowsiness or dizziness." These are assigned by hazard class and category, so the manufacturer doesn't write them from scratch.

4. Precautionary statements. Instructions for safe handling, storage, disposal, and first aid. OSHA's standard references the GHS precautionary statement codes (P-codes). A label for a flammable liquid might say "Keep away from heat, sparks, and open flames" and "Use explosion-proof electrical equipment."

5. Pictogram(s). Red-bordered diamond symbols, each containing a black hazard symbol on a white background. There are nine GHS pictograms covering categories from flammable (flame symbol) to corrosive (hand being eaten by liquid) to environment (dead fish and tree). A single container can carry several pictograms.

6. Supplier information. The name, address, and phone number of the manufacturer, importer, or distributor. This is who emergency responders and safety officers call when the SDS isn't enough.

Every one of these elements must be present. A label missing the supplier's phone number is technically non-compliant, even if everything else looks right.

What do the GHS pictograms on a hazcom label actually mean?

The nine GHS pictograms are standardized worldwide, which is the whole reason they exist. If a container ships from Germany to Texas, a worker in both places should read the same symbols and understand the same risks. Here's a plain-language breakdown:

Pictogram	Symbol inside	Hazard categories covered
Flame	Flame	Flammables, self-reactives, pyrophorics, self-heating, emits flammable gas, organic peroxides
Flame over circle	Flame over circle	Oxidizers
Exploding bomb	Burst circle	Explosives, self-reactives, organic peroxides
Skull and crossbones	Skull	Acute toxicity (fatal or toxic, categories 1-3)
Exclamation mark	!	Acute toxicity (harmful, category 4), skin/eye irritation, sensitizer, narcotic effects
Corrosion	Hand and metal being eaten	Skin corrosion, eye damage, corrosive to metals
Health hazard	Human silhouette with asterisk	Carcinogen, mutagen, reproductive toxin, respiratory sensitizer, STOT, aspiration hazard
Gas cylinder	Cylinder	Gases under pressure
Environment	Dead fish and tree	Aquatic toxicity (not yet mandatory under federal OSHA HazCom 2012, but often included) [2]

The exclamation mark and the health hazard symbol trip people up the most. The exclamation mark covers a broad range of less-severe acute effects. The health hazard symbol flags chronic dangers: cancer risk or reproductive harm. A chemical can carry both.

One detail worth knowing. Pictograms communicate hazard category severity. If a chemical qualifies for both "skull and crossbones" and "exclamation mark" for the same hazard class, OSHA allows only the more severe symbol (skull) to appear, to avoid cluttering the label ^[1].

Who is responsible for creating the label: the manufacturer or the employer?

Chemical manufacturers, importers, and distributors create and provide the original GHS-compliant label under 29 CFR 1910.1200(f)(1) ^[1]. That's their job before the product ever leaves the facility or port.

Employers carry a narrower set of obligations. First, they can't remove, deface, or cover any label on an incoming container. Second, they must keep labels legible. A drum that sat in a wet storage area until the label peeled off is the employer's problem to fix, not the supplier's. Third, employers create and apply labels to any secondary or portable containers they fill themselves.

The secondary container rule trips up a lot of small shops. If someone pours acetone from the original manufacturer's can into a smaller squeeze bottle for daily use at a workstation, that squeeze bottle needs a label. It doesn't have to be as elaborate as the original GHS label (OSHA allows "pull-out labels, tags, or other such alternatives" for portable containers that stay in the immediate work area and get used by the person who filled them within the same work shift) ^[1], but a bare unlabeled bottle is a violation.

For workplaces that produce their own chemicals (compounding, blending, synthesis), the employer functions as the manufacturer and has to develop the full label and accompanying SDS from scratch.

What are the rules for labeling secondary containers and portable containers?

29 CFR 1910.1200(f)(7) gives employers some room on secondary containers, but it's narrower than most people think ^[1]. Here's the actual rule.

You don't have to label a portable container if three things are all true: (a) it's filled from a larger labeled container, (b) it's only used by the person who transferred the chemical, and (c) it will be used up within the same work shift. All three conditions have to hold. If the container goes home with someone, gets left on a bench for the next shift, or gets used by another employee, it needs a label.

For secondary containers that don't meet all three conditions, the label must include at minimum the product identifier plus words, pictures, or symbols that give general information about the hazards. A full GHS-formatted label with all six elements is always acceptable and usually the safest approach.

Most small businesses should just apply full labels to every secondary container. Tracking which bottle was filled during which shift by which person is more work than printing a label. Pre-printed secondary container labels are cheap, and industrial label printers have come down enough in price that many shops find them worth the money.

How does OSHA enforce hazcom label violations and what are the penalties?

OSHA's Hazard Communication Standard has ranked in the top ten most-cited standards for more than 30 straight years. In fiscal year 2023 it ranked number one, with 3,213 citations issued ^[3]. Most of those citations touch labeling directly or indirectly.

Citation categories and penalties as of 2024 ^[4]:

• Other-than-serious: Up to $16,131 per violation. These usually cover paperwork issues or labels that are present but incomplete.
• Serious: Up to $16,131 per violation. A missing label on a chemical that creates real injury risk falls here.
• Willful or repeated: Up to $161,323 per violation. If OSHA cited you for the same labeling problem two years ago and you still haven't fixed it, expect a repeated citation.

OSHA raises penalty maximums each year for inflation under the Federal Civil Penalties Inflation Adjustment Act ^[4].

Inspectors typically pull a sample of chemicals on the floor. If they grab five containers and two have missing or defaced labels, each unlabeled container can be a separate violation. At a facility with dozens of chemicals, that adds up fast.

The other enforcement path is the complaint inspection. Workers can report hazcom violations to OSHA anonymously. A single complaint about unlabeled containers can trigger an inspection that covers the entire program, well beyond labels.

How should employers train workers to read and use hazcom labels?

29 CFR 1910.1200(h) requires employers to train workers on the HazCom standard before initial assignment to a job involving hazardous chemicals, and again when new hazards show up ^[1]. The label-specific training has to cover what each element means and how employees use that information in real work.

For labels specifically, training should cover:

• The meaning of each of the six required elements
• How to read a signal word and what the difference between "Danger" and "Warning" means in practice
• Each of the nine GHS pictograms and the hazard categories they represent
• Where to find additional information (the SDS) and how label information connects to SDS sections
• What to do if a label is missing, damaged, or unreadable
• The secondary container labeling rules and what employees are responsible for

Training doesn't have to be classroom-based. A supervisor walking a new hire through the chemicals in their work area, pointing to each label element, covering the relevant SDS, and documenting that conversation satisfies the standard. What OSHA wants is evidence that training happened and that it was specific to the actual chemicals in the workplace, never generic.

For a structured approach to OSHA training that covers several standards at once, including HazCom, a formal program helps make sure you're not missing anything.

If you need to build a written HazCom program quickly, SafetyFolio's safety program generator can produce a compliant written program in about 15 minutes, including the training documentation structure.

What is the difference between a hazcom label and a safety data sheet?

The label and the SDS work together but do different jobs. The label lives on the container and gives workers immediate, at-a-glance information about hazards and basic precautions. The SDS is a 16-section document that goes deep on chemistry, toxicology, exposure limits, first aid, firefighting measures, and disposal. OSHA adopted the 16-section SDS format as part of the 2012 GHS alignment ^[1].

Think of it this way. The label tells you the building is on fire. The SDS tells you what the building is made of, how hot the fire can get, what toxic gases the smoke contains, and which extinguishing agents to use.

Employers must keep SDSs accessible to workers during every work shift for every hazardous chemical in the workplace. Paper binders work. Electronic systems work if employees have immediate access during an emergency. A locked computer that needs a password and a supervisor key is probably not immediate access.

For specific chemicals, like checking the SDS for a common industrial acid, see our article on the hcl safety data sheet as an example of what a real SDS looks like and how to read the sections that matter most.

The product identifier on the label must match section 1 of the SDS exactly. That match is how a worker or paramedic pulls up the right SDS in an emergency.

Are there any chemicals or products exempt from hazcom labeling?

Yes, and the exemptions are more specific than most people expect. 29 CFR 1910.1200(b)(6) lists the categories excluded from the standard ^[1]:

• Hazardous waste regulated under RCRA (covered by EPA, not OSHA HazCom)
• Tobacco products
• Wood and wood products (with a narrow exception for wood dust generated by processing)
• Articles (items that don't release hazardous chemicals under normal use, like a steel bolt)
• Food, drugs, and cosmetics regulated under the FDCA for consumer use
• Consumer products used in the workplace the same way a consumer would use them at home, in the same quantities, with the same frequency
• Ionizing and nonionizing radiation
• Biological hazards

The consumer product exemption confuses employers constantly. If your cleaning crew uses a gallon jug of bleach the same way someone would at home, it's exempt. If they're going through 55-gallon drums of the same chemical six hours a day, five days a week, the "consumer use" argument falls apart and it needs full HazCom treatment.

OSHA has published letters of interpretation on the consumer product exemption; check OSHA.gov for the current guidance on how to apply it in practice ^[5].

What do you do if a label is damaged, missing, or in a foreign language?

A damaged or missing label means the employer takes the container out of service or relabels it before returning it to use. You can relabel using information from the original SDS. The relabeled container must include all six required elements. You can't just write the chemical name on a piece of tape and call it done.

For foreign-language labels, 29 CFR 1910.1200(f)(8) requires employers to provide the label information in English ^[1]. The standard doesn't ban additional languages, and including Spanish, Haitian Creole, or any other language your workforce speaks is a good idea. But English has to be present.

If your workforce mainly speaks a language other than English, provide bilingual labels and bilingual training materials. OSHA offers HazCom materials in Spanish through OSHA.gov ^[6]. This is more than legal risk management. A worker who can't read a label in their primary language is genuinely more likely to get hurt.

For labels that are partly readable, use judgment. If you can still identify the chemical name and read the signal word and pictograms, the label may be serviceable until you replace it. If you're unsure what's in the container, treat it as unknown and either contact the supplier for a replacement label or dispose of it through proper chemical waste channels.

How do hazcom labels apply in specific industries like construction and maritime?

The core HazCom standard at 29 CFR 1910.1200 covers general industry. OSHA extended parallel requirements to construction (29 CFR 1926.59) and maritime (29 CFR 1915.99, 1917.28, 1918.90) ^[7]. The labeling requirements are substantially the same across all three sectors, because GHS is the foundation in each case.

Construction has some practical differences. Containers on job sites get beat up faster. Outdoor storage, multiple trades handling the same materials, and high turnover all raise the odds a label gets destroyed or a new subcontractor runs into a relabeled container they don't recognize. General contractors who control a multi-employer site carry some responsibility for making sure subcontractors' chemicals are properly labeled, especially in shared work areas.

Maritime operations deal with extra requirements from the International Maritime Organization (IMO) for chemicals shipped internationally, but OSHA's domestic requirements still apply to chemicals used in shipyard work.

Healthcare workplaces covered by 29 CFR 1910 have the same labeling obligations for chemicals like cleaning agents, sterilants, and lab reagents. Some facilities wrongly assume FDA regulation of drugs means OSHA HazCom doesn't apply. For chemicals used as drugs on patients, FDA controls. For the same chemical used as a cleaning or sterilizing agent by workers, OSHA controls.

What should a compliant written hazard communication program say about labels?

OSHA's standard requires a written HazCom program at every workplace that has hazardous chemicals ^[1]. The written program has to address labeling specifically. At minimum, it needs to describe:

• How incoming containers get checked for proper labels on receipt
• The procedure for labeling secondary and portable containers
• What employees should do if they find a damaged or missing label
• Who is responsible for maintaining the labeling system

The written program doesn't have to be long. A two-page document that actually answers those four questions beats a 30-page boilerplate nobody reads. The key is that it reflects what your workplace actually does. OSHA inspectors compare your written program to what they see on the floor. If your program says you check incoming containers on receipt and there are unlabeled drums in your storage room, that gap makes your citation worse, not better.

This is exactly the kind of document SafetyFolio's program generator is built to produce: a written program that matches your specific chemical inventory and operations rather than a generic template pulled from a binder. It takes about 15 minutes and covers the labeling, SDS, and training components OSHA requires.

If you want to see how the written HazCom program fits into a broader safety documentation system, our guide to hazard communication covers the full picture.

Frequently asked questions

Does every container in the workplace need a GHS hazard communication label?

Every container of a hazardous chemical needs a label unless it qualifies for one of the narrow exemptions in 29 CFR 1910.1200(b)(6), such as articles, tobacco, or consumer products used at consumer quantities and frequency. Secondary portable containers are also exempt if they're filled and used by the same person within the same work shift. Any other container needs a label.

What happens if an employee removes a hazcom label from a container?

Removing or defacing a label violates 29 CFR 1910.1200(f)(9), which bars employers from allowing labels to be removed. An employer who tolerates label removal can face an OSHA citation. Relabel the container immediately from the SDS information and address the behavior through whatever disciplinary process the company uses. Employees also have obligations not to remove labels under the standard.

How is a GHS label different from the old HMIS or NFPA diamond?

HMIS (Hazardous Materials Identification System) and the NFPA 704 diamond use numeric rating scales (0-4) and color-coded bars to communicate hazard severity at a glance. They're common on stationary tanks and in fire codes. GHS labels use standardized pictograms, signal words, and text statements. GHS is OSHA's required system for container labels under 29 CFR 1910.1200. NFPA and HMIS markings on facilities don't substitute for GHS labels on containers.

Can a workplace use a QR code on a label instead of printing all six elements?

OSHA's position, clarified in a 2014 letter of interpretation, is that supplemental electronic information (like a QR code linking to the SDS) is acceptable as a supplement, never a substitute. All six required label elements must appear on the physical label. A QR code that replaces printed hazard statements would not comply with 29 CFR 1910.1200(f)(1). If the technology goes down or a worker lacks a smartphone, the label still has to work on its own.

What training do employees need specifically on reading hazcom labels?

29 CFR 1910.1200(h) requires training before initial assignment and when new chemicals are introduced. For labels, training must cover the meaning of each required element: pictograms, signal words, hazard statements, precautionary statements, the product identifier, and supplier information. Training must be specific to the actual chemicals in the employee's work area, never generic. Documentation of training completion is required.

Are small businesses with fewer than 10 employees exempt from hazcom labeling?

No. The HazCom standard applies to any employer with one or more employees who may be exposed to hazardous chemicals, regardless of company size. Small employer status affects some OSHA recordkeeping requirements (establishments with 10 or fewer employees are partially exempt from 29 CFR 1904 injury logs) but does not affect HazCom labeling or program requirements. One employee who handles a hazardous chemical means full HazCom compliance is required.

What is a signal word on a hazcom label and how is it determined?

A signal word is either "Danger" or "Warning," chosen based on the chemical's GHS hazard classification and category. "Danger" indicates a more severe hazard (typically categories 1 and 2 for most classes). "Warning" indicates a less severe hazard (typically categories 3 and 4). When a chemical has multiple hazards, only one signal word appears: the one corresponding to the most severe hazard category across all classifications.

Do employers need to keep records of their chemical inventory for hazcom compliance?

Yes. 29 CFR 1910.1200(e)(1)(i) requires the written HazCom program to include a list of all hazardous chemicals in the workplace, using the same product identifiers found on the labels and SDSs. This list doesn't have to be elaborate: a spreadsheet of chemical names, their locations, and SDS file references works. It also helps during OSHA inspections and emergency response.

What is the GHS and how does it relate to OSHA's hazard communication standard?

The GHS (Globally Harmonized System of Classification and Labelling of Chemicals) is a United Nations framework that standardizes how hazardous chemicals are classified and communicated. OSHA revised its Hazard Communication Standard in 2012 to align with GHS, changing label and SDS formats to match GHS requirements. The terms 'HazCom 2012' and 'GHS-aligned labeling' are often used interchangeably in the context of OSHA compliance in the United States.

How often do hazcom labels need to be updated or reviewed?

OSHA doesn't set a fixed calendar schedule for label review. Manufacturers and importers must update labels when new hazard information becomes available, and changes must be reflected in the SDS and label within three months of discovering the new information, per 29 CFR 1910.1200(g)(5). Employers should check labels when they receive new shipments, especially if the formulation has changed, and whenever OSHA updates its hazard communication rules.

Are there specific font size or color requirements for hazcom labels?

OSHA's standard requires labels to be legible, in English (additional languages are permitted), and displayed prominently under 29 CFR 1910.1200(f)(2), but it doesn't mandate a specific font size or typeface. Pictograms must appear with a red border. In practice, OSHA expects that a worker can read the label under normal workplace lighting without special equipment.

What is the difference between a "Danger" and a "Warning" signal word on a chemical label?

"Danger" is reserved for the most severe hazard categories within a given hazard class, typically categories 1 and 2. "Warning" covers less severe categories, typically 3 and 4. The distinction matters because it tells a worker how urgently to treat the hazard. A product labeled "Danger" calls for more protective measures and more caution than one labeled "Warning" in the same hazard category.

Can employees refuse to work with a chemical that has no hazcom label?

Employees have the right to refuse work they reasonably believe poses imminent danger, under the OSH Act Section 11(c) and established OSHA enforcement policy. An unlabeled container of an unknown chemical is a reasonable basis for concern. Best practice: pull the container from service, identify the chemical through the supplier or SDS file, relabel it, and return it to use. Employers should make this the standard procedure, not something employees have to fight for.

How do multi-employer worksites handle hazcom labeling when multiple contractors are on site?

On multi-employer sites, the host employer and each contractor must make sure their own chemicals are properly labeled. The host employer must make SDSs available for all chemicals present and inform all employers on site of hazards their workers may encounter. OSHA's multi-employer citation policy means a general contractor can be cited for a subcontractor's labeling failures if the GC had control over the work area and didn't take reasonable steps to detect or correct the problem.

Sources

1. OSHA, 29 CFR 1910.1200 Hazard Communication Standard (full regulatory text): Six required label elements, secondary container rules, written program requirements, training requirements, and exemptions under the Hazard Communication Standard
2. OSHA, Hazard Communication: GHS Pictogram Reference: Nine GHS pictograms and their associated hazard categories, including the environmental pictogram not yet mandatory under federal HazCom
3. OSHA, Top 10 Most Frequently Cited Standards FY2023: Hazard Communication Standard ranked number one most-cited OSHA standard in FY2023 with 3,213 citations
4. OSHA, Civil Penalty Structure and Maximum Penalty Amounts: Maximum penalty of $16,131 per serious or other-than-serious violation and $161,323 per willful or repeated violation as of 2024
5. OSHA, Hazard Communication Resources and Letters of Interpretation: OSHA guidance on the consumer product exemption under the Hazard Communication Standard
6. OSHA, Hazard Communication Spanish-Language Resources: OSHA provides HazCom training and informational materials in Spanish on its HazCom resource page
7. OSHA, 29 CFR 1926.59 Hazard Communication (Construction): Construction-sector HazCom standard that extends GHS labeling requirements to construction worksites
8. United Nations Economic Commission for Europe, Globally Harmonized System of Classification and Labelling of Chemicals (GHS): GHS is the UN framework that standardized chemical hazard classification and label format, adopted by OSHA in its 2012 HazCom revision
9. BLS, Survey of Occupational Injuries and Illnesses 2022: BLS injury and illness data used as context for chemical exposure incidents in U.S. workplaces