The 8 OSHA Pictograms vs the 9 GHS Pictograms: Why the Environment Symbol Isn't Required

OSHA requires eight GHS pictograms on hazardous chemical labels under 29 CFR 1910.1200, Appendix C. The full international GHS defines a ninth pictogram — the Environment (aquatic toxicity) symbol, GHS09 — but OSHA does not require it, because environmental hazards fall outside OSHA's worker-safety jurisdiction (they belong to the EPA). Its use on US labels is voluntary and permitted. Calling GHS09 the "9th required pictogram" is one of the most common HazCom myths — and it is the single distinction this article exists to settle.

The 8-vs-9 distinction in one table

GHS (the Globally Harmonized System) is a United Nations framework, not a single binding law. Each country adopts it as a set of "building blocks," choosing which hazard classes and symbols to enforce. The US adopted GHS into the Hazard Communication Standard and selected eight of the nine pictograms.

The eight OSHA pictograms cover physical hazards (fire, explosion, oxidizers, gases under pressure) and health hazards (toxicity, corrosivity, irritation, carcinogenicity). The ninth covers environmental hazards — a domain OSHA does not regulate.

Why the environment symbol is voluntary under OSHA

The answer is jurisdictional, not safety-based. OSHA's authority comes from the Occupational Safety and Health Act of 1970, whose mandate is protecting workers, not ecosystems. Aquatic and environmental toxicity is the statutory domain of the U.S. Environmental Protection Agency (EPA) under laws like the Clean Water Act, RCRA, and CERCLA.

So when OSHA harmonized the HazCom Standard with GHS, it could only adopt the building blocks that fall within its own legal authority. The eight worker-health and physical-hazard pictograms made the cut; the environment pictogram (GHS09) did not become a requirement — but OSHA explicitly permits it on US labels.

Key takeaways:

• The environment pictogram is permitted on US labels but not required by OSHA.
• A label without GHS09 meets 29 CFR 1910.1200.
• Including GHS09 (common on internationally shipped products) does not violate OSHA.
• It should never be described as the "9th OSHA-required pictogram."
• Environmental release of the chemical is still regulated — just by EPA, not OSHA.

The eight OSHA-required pictograms

Each pictogram is a black symbol on a white background inside a red diamond frame (a square set on a point). Per Appendix C, the red frame must be "sufficiently wide" to be clearly visible, and a red frame with no symbol inside it is prohibited.

For a symbol-by-symbol breakdown with construction examples, PPE, and precautions, see GHS Pictograms Explained: What Each Symbol Means.

The ninth (voluntary) GHS pictogram

You will see GHS09 most often on petroleum products (diesel, motor oil, hydraulic fluid), pesticides and wood preservatives, and some sealers and solvents. Manufacturers selling the same product in the EU, Canada, or Australia frequently leave GHS09 on the US label rather than print two artwork versions — and that is perfectly fine.

Worked example: does this label need a 9th pictogram?

Suppose a contractor receives a 5-gallon pail of a petroleum-based concrete form-release oil with a Safety Data Sheet that classifies it as:

• Flammable liquid, Category 3 → GHS02 (Flame)
• Skin irritant, Category 2 → GHS07 (Exclamation Mark)
• Aspiration hazard, Category 1 → GHS08 (Health Hazard)
• Hazardous to aquatic environment, Chronic Category 2 → would be GHS09

How many pictograms must the US label show? Three: GHS02, GHS07, and GHS08. The aquatic-toxicity classification is real and belongs in SDS Section 12 (Ecological Information), but because GHS09 is outside OSHA's jurisdiction, the label is fully OSHA-compliant without it. If the supplier did print GHS09 (very likely, since the product is petroleum-based), that is also compliant — it adds information without breaking any rule.

One more wrinkle: under OSHA's precedence rules (Appendix C.4), if the exclamation mark (GHS07) is used for skin sensitization or respiratory irritation and a more severe symbol also applies, GHS07 may be dropped. But GHS07 here is for skin irritation, which is not overridden — so all three required symbols stay.

How the precedence rules work

OSHA's Appendix C keeps two symbols that would send a mixed message about the same hazard from both appearing:

• If the skull and crossbones (GHS06) applies, the exclamation mark (GHS07) is not shown for acute toxicity.
• If the corrosion (GHS05) symbol applies, the exclamation mark is not shown for skin or eye irritation.
• If the health hazard (GHS08) symbol applies for respiratory sensitization, the exclamation mark is not shown for skin sensitization or skin/eye irritation.

Each rule only suppresses the lesser symbol for the same hazard endpoint. That is why, in the pail above, the exclamation mark for skin irritation stays even though a flame and a health-hazard symbol are also present — different endpoints, so all three belong. Precedence removes duplicates of a message; it never removes a hazard the worker still needs to see.

How pictograms must appear on labels

Whether on a shipped-container label (29 CFR 1910.1200(f)(1)) from the manufacturer or a full-information workplace/secondary label (29 CFR 1910.1200(f)(6)(i)), pictograms must be:

• A black symbol on a white background,
• Inside a red frame that is a square set on a point and "sufficiently wide," and
• Clearly legible — not shrunk to illegibility or reproduced in black-and-white.

Emoji, clip-art, or monochrome substitutes are not compliant. A chemical with multiple hazards must display all applicable required pictograms. Need to produce compliant artwork? Use the GHS Label Generator, and for in-house bottles see Secondary Container Labels: OSHA Rules.

What's the risk of getting this wrong?

Mislabeling cuts both ways. Omitting a required pictogram (one of the eight) is a labeling violation under 29 CFR 1910.1200(f) — and Hazard Communication ranked second on OSHA's FY2025 list of most-cited standards. A serious citation can run up to $16,550 (2026 maximum, unchanged from 2025), with willful or repeated violations up to $165,514. Construction employers are covered through 29 CFR 1926.59, which adopts the 1910.1200 standard by reference.

By contrast, adding the voluntary GHS09 symbol carries no OSHA penalty — it is expressly permitted. The only real "mistake" with GHS09 is believing it is required and panicking when a supplier omits it, or worse, citing a subcontractor for not having it.

Note: This is general guidance, not legal advice. OSHA-approved State Plans may have their own HazCom requirements that are at least as effective as the federal standard; verify your state's rules.

Common mistakes to avoid

• Don't call the environment symbol an OSHA requirement — GHS09 is voluntary.
• Don't omit a required pictogram because the label is small (the small-container accommodation at 1910.1200(f)(12) applies only to shipped containers, and the ≤100 mL reduced set still requires pictograms).
• Don't use a red-and-black symbol without the white background and red diamond frame — and never print an empty red frame.
• Don't drop pictograms when a chemical has several hazards — show all applicable required symbols.
• Don't confuse GHS pictograms (red diamonds, product labels, OSHA) with NFPA 704 diamonds (multicolored, building placards, emergency responders).
• Do match the pictograms to the hazard classification in SDS Section 2 — and remember aquatic data lives in Section 12.

What to do next

1. Audit your incoming labels against the eight required symbols using SDS Section 2 — not the supplier's artwork alone.
2. Stop treating GHS09 as a red flag. If it appears, fine; if it doesn't, also fine.
3. Fix workplace/secondary containers, which are the most commonly cited gap — generate compliant ones with the GHS Label Generator.
4. Train your crew to recognize the eight symbols; a quick Toolbox Talk does the job. Background reading: Complete OSHA HazCom 2026 Guide.
5. Track HazCom 2024 deadlines — the employer compliance date for substances is November 20, 2026 (29 CFR 1910.1200(j)). See the Hazard Communication Standard 1910.1200 overview.

Put the right pictograms on every label

Generate labels with the correct eight OSHA pictograms — properly red-framed and SDS-matched — using the GHS Label Generator. Related reading: GHS Labels hub · GHS Pictograms Explained · GHS Label Requirements Complete Guide · Secondary Container Labels: OSHA Rules.

Sources & verification: 29 CFR 1910.1200 Appendix C (pictograms) and (f) (labels); construction adoption via 29 CFR 1926.59; penalty maximums per 29 CFR 1903.15(d) (2026). Facts verified against the HazComFast regulatory source of truth (ghsClassification, hcsDeadlines, oshaPenalties), last verified 2026-06-26. Not legal advice.