What Is HazCom? OSHA Hazard Communication Standard Explained

What Is HazCom?

HazCom — short for Hazard Communication — is OSHA's requirement that every employer who uses hazardous chemicals must tell their workers what those chemicals are, what dangers they pose, and how to handle them safely.

The formal name is the OSHA Hazard Communication Standard, codified at 29 CFR 1910.1200. You'll also hear it called the HCS, the "Right to Know" law, or simply "HazCom." Whatever you call it, the goal is the same: workers have the right to know what chemicals they're exposed to on the job.

It's not optional. HazCom consistently ranks as one of OSHA's Top 10 most-cited standards every year, with thousands of violations issued annually. In fiscal year 2024, Hazard Communication was the #2 most-cited standard across all industries, behind only Fall Protection.

Who Does the Hazard Communication Standard Apply To?

The OSHA Hazard Communication Standard applies to virtually every workplace in America that uses, stores, or handles chemicals. That's broader than most people think. It includes:

• Manufacturing plants — chemicals in production processes, solvents, coatings
• Auto repair shops — brake fluid, degreasers, paints, refrigerants
• Pest control companies — pesticides, herbicides, fumigants
• Agricultural operations — fertilizers, agrochemicals, fuel
• Laboratories — reagents, acids, compressed gases
• Cleaning services — industrial cleaners, disinfectants, solvents
• Construction sites — adhesives, sealants, concrete additives
• Restaurants and food service — commercial cleaning chemicals, sanitizers
• Schools and universities — lab chemicals, maintenance products
• Healthcare facilities — sterilants, chemotherapy drugs, lab reagents

If your employees could be exposed to hazardous chemicals during normal work or in a foreseeable emergency, you need a HazCom program. The standard applies to all hazardous chemicals — not just the obviously dangerous ones. Even common products like certain cleaning sprays, paints, and adhesives can qualify.

Who Is Exempt?

A few narrow exemptions exist: - Consumer products used in the same manner and duration as a typical consumer - Pharmaceuticals dispensed in final form for patient administration - Food, drugs, and cosmetics regulated by the FDA - Hazardous waste regulated under RCRA - Tobacco products - Wood and wood products (unless processed to generate dust or are treated)

If you're unsure whether your workplace qualifies, the safe assumption is: yes, it does.

The Six Elements of a HazCom Program

OSHA requires your Hazard Communication program to cover six specific elements. Missing any one of them can result in a citation.

1. Written Hazard Communication Program

Every covered employer must have a written HazCom program — a document that describes how your company implements each element of the standard. This isn't a template you file away. It needs to reflect what you actually do.

Your written program must include: - How you will maintain your chemical inventory - How SDSs are obtained, maintained, and made accessible - Who is responsible for labeling - How and when employees are trained - Procedures for non-routine tasks involving chemicals - How you share hazard information with contractors in multi-employer workplaces

OSHA inspectors will ask to see this document. If you don't have one — or it doesn't match your actual practices — that's a violation.

2. Chemical Inventory List

You need a complete, up-to-date list of every hazardous chemical present at each worksite. This inventory is the foundation of your HazCom program. Everything else — SDSs, labels, training — flows from knowing what chemicals you have. For a deeper dive, see our complete guide to EHS chemical inventory management.

Best practices: - Include the product name, manufacturer, and location for each chemical - Update the list whenever chemicals are added or removed - Audit at least annually - Cover every area — don't forget maintenance closets, break rooms, and outdoor storage

3. Safety Data Sheets (SDSs)

Every hazardous chemical in your workplace must have a corresponding Safety Data Sheet — a standardized 16-section document that provides detailed information about the chemical's properties, hazards, safe handling, storage, and emergency procedures.

Key requirements: - Maintain an SDS for every hazardous chemical on-site - SDSs must be readily accessible to all employees during their shifts — not locked in an office - Chemical manufacturers must update SDSs within 3 months of learning new hazard information - The 16-section GHS format is mandatory (not the old MSDS format)

"Readily accessible" means employees can get to them quickly without asking permission. A binder in a locked manager's office doesn't count. Digital SDS systems that work on mobile devices are becoming the standard approach for meeting this requirement. Learn more in our guide: What Is a Safety Data Sheet (SDS)?

4. Labels and Warnings

All chemical containers must have proper GHS-compliant labels. This applies to both manufacturer labels on original containers and workplace labels on secondary containers. For the full breakdown, see GHS Label Requirements: What OSHA Expects on Every Container.

Required label elements: - Product identifier — the chemical name matching the SDS - Signal word — either DANGER (more severe) or WARNING (less severe) - Hazard statements — H-codes describing the specific hazards (e.g., "Causes serious eye damage") - Pictograms — standardized diamond-shaped red-bordered symbols (there are 9 GHS pictograms) - Precautionary statements — how to handle, store, and dispose of the chemical safely - Supplier information — name, address, and phone number

Secondary containers (when you transfer chemicals from the original container) also need labels — at minimum, the product identifier and hazard information. This is one of the most commonly missed requirements.

5. Employee Training

Employers must train employees on chemical hazards. This isn't a one-time event — it's ongoing.

Required training covers: - The HazCom standard itself and your company's written program - How to read and interpret Safety Data Sheets - How to read and interpret chemical labels and GHS pictograms - Physical and health hazards of chemicals in their specific work area - Protective measures — PPE, ventilation, emergency procedures - What to do if there's a spill, leak, or exposure

Training must happen: - At initial assignment — before the employee works with or near chemicals - When a new chemical hazard is introduced — not just new chemicals, but new hazards from existing chemicals - When processes change — new procedures that affect chemical exposure

You must document that training occurred. OSHA will ask for records.

6. Non-Routine Tasks and Multi-Employer Coordination

Two often-overlooked requirements:

Non-routine tasks: If employees occasionally perform tasks outside their normal duties that involve chemical exposure (like cleaning a rarely-used storage tank), your program must address how those situations are handled.

Multi-employer workplaces: If contractors, temporary workers, or other employers' employees work at your site, you must share hazard information with them — including your chemical inventory and SDS locations. They need the same information your own employees get.

Common HazCom Violations and OSHA Penalties

HazCom violations are some of the most frequently issued citations. Here's what OSHA finds most often:

Willful violations — where OSHA determines you knew about the requirement and ignored it — can reach $161,323 per violation. Repeat violations carry the same maximum.

These penalties are per-violation, per-instance. A single inspection finding 5 unlabeled containers and 3 missing SDSs could result in 8 separate citations.

HazCom 2024: What Changed

OSHA updated the Hazard Communication Standard in 2024 to align with GHS Revision 7. For a complete walkthrough of what changed and what to do, read OSHA HazCom 2024: What Small Businesses Must Do Before the Deadline (the Globally Harmonized System of Classification and Labelling of Chemicals). Key changes:

• New hazard categories for aerosols, desensitized explosives, and chemicals under pressure
• Updated classification criteria for flammable gases and certain health hazards
• Concentration ranges on labels — manufacturers can now specify concentration ranges for ingredients
• Small container labeling — new provisions for labeling containers under 100 mL
• Bulk shipment labeling — updated requirements for large-quantity chemical shipments

Compliance deadlines: - January 19, 2026 — Manufacturers/importers must reclassify pure substances and update labels/SDSs - July 19, 2027 — Manufacturers/importers must reclassify mixtures and update labels/SDSs - January 19, 2028 — All employers must have updated SDSs and labels in the workplace

If you're building or updating your HazCom program now, build it to the 2024 standard. There's no reason to implement the old version.

How to Build a HazCom Program: Step by Step

If you're starting from scratch or modernizing an existing program:

Step 1: Conduct a chemical inventory audit. Walk every area of your facility and document every hazardous chemical. Check storage rooms, maintenance closets, loading docks — everywhere.

Step 2: Gather SDSs for every chemical. Contact manufacturers or use their websites to obtain current SDSs. Make sure they're in the 16-section GHS format.

Step 3: Write your Hazard Communication Program. Document how you'll handle each of the six elements. Be specific to your workplace — generic templates won't survive an inspection.

Step 4: Label all containers. Verify that all original containers have GHS-compliant labels. Create workplace labels for all secondary containers.

Step 5: Train your employees. Cover all required topics. Document who was trained, when, and what was covered. Make training specific to the chemicals in each work area.

Step 6: Set up ongoing maintenance. HazCom isn't a one-time project. New chemicals arrive, employees change, SDSs get updated. Build a system that keeps everything current.

Why Paper-Based HazCom Programs Fail

The six-element structure sounds straightforward on paper. In practice, maintaining a compliant HazCom program manually is where most businesses fall behind:

• Binders full of SDSs that nobody updates when chemicals change
• Chemical inventories that are outdated the week after the audit
• Training records scattered across spreadsheets, emails, and filing cabinets
• No system to flag when an SDS is outdated or a new employee needs training

This is why HazCom stays in OSHA's Top 10 year after year. It's not that businesses don't care — it's that manual processes can't keep up with the ongoing requirements. Digital SDS management systems, chemical inventory software, and automated training platforms exist specifically to solve this problem — and they're becoming the standard approach for businesses that want to stay ahead of inspections instead of reacting to them. If you're evaluating options, our guide on hazard communication software covers what to look for.

Key Takeaways

• HazCom applies to almost every business that uses hazardous chemicals — including common cleaning products and maintenance supplies
• Six elements make up a compliant program: written plan, chemical inventory, SDSs, labels, training, and multi-employer coordination
• Penalties are steep — up to $16,131 per violation for serious citations, $161,323 for willful violations
• HazCom 2024 updated the standard to align with GHS Revision 7, with compliance deadlines through January 2028
• Manual programs fail because they can't keep up with ongoing requirements — digital tools exist to solve exactly this problem