Safety Data Sheet (SDS)
A standardized 16-section document that communicates detailed information about the hazards, safe handling, storage, and emergency procedures for chemical products used in the workplace, required under OSHA's Hazard Communication Standard.
- What Is a Safety Data Sheet (SDS)?
- The 16 Sections of a Safety Data Sheet
- Employer Obligations Under HazCom
- How to Manage SDSs Effectively
- How to Read an SDS: Key Sections for HR and Safety Teams
- GHS Labels and Their Connection to SDSs
- Common SDS and HazCom Violations
- SDS and Hazard Communication Statistics [2026]
- Frequently Asked Questions About Safety Data Sheets
What Is a Safety Data Sheet (SDS)?
Key Takeaways
- ✓A Safety Data Sheet is a detailed document that describes the physical and health hazards of a chemical product, along with instructions for safe handling, storage, disposal, and emergency response.
- ✓OSHA's Hazard Communication Standard (29 CFR 1910.1200) requires chemical manufacturers and importers to provide SDSs for every hazardous product, and employers must maintain them and make them accessible to exposed workers.
- ✓The format follows the Globally Harmonized System (GHS) with 16 standardized sections, making SDSs consistent worldwide regardless of the chemical manufacturer.
- ✓SDSs replaced the older Material Safety Data Sheets (MSDSs) in 2015 when OSHA aligned the Hazard Communication Standard with GHS Rev. 3.
- ✓Employers don't create SDSs. Chemical manufacturers and importers do. Employers must collect, organize, maintain, and provide employee access to them.
A Safety Data Sheet is the instruction manual for every hazardous chemical in your workplace. It tells you what's in the product, what can go wrong, how to protect yourself, and what to do if something does go wrong. It's not optional reading for workplaces that handle chemicals. OSHA requires that SDSs be readily accessible to every employee who may be exposed to a hazardous chemical during their normal work or in a foreseeable emergency. 'Readily accessible' means the worker can get to it quickly, without asking permission or jumping through hoops. A locked filing cabinet in the plant manager's office doesn't count. An electronic system that crashes every other day doesn't count either. SDSs aren't exciting documents. They're dense, technical, and usually 10 to 16 pages long. But they contain life-saving information. When a worker splashes an unknown chemical in their eyes, the SDS tells the emergency responder exactly what they're dealing with. When a fire breaks out near chemical storage, the SDS tells firefighters which extinguishing agents to use and which to avoid. For HR and safety teams, the SDS program is a core compliance obligation. Hazard Communication violations are consistently in OSHA's top five most-cited standards every year.
The 16 Sections of a Safety Data Sheet
Every SDS follows the same 16-section format under GHS. The sections must appear in this order, and no section can be omitted.
| Section | Title | What It Contains |
|---|---|---|
| 1 | Identification | Product name, manufacturer info, recommended use, emergency phone number |
| 2 | Hazard Identification | GHS classification, signal word, hazard statements, pictograms, precautionary statements |
| 3 | Composition/Information on Ingredients | Chemical names, CAS numbers, concentration ranges for mixtures |
| 4 | First-Aid Measures | Treatment by exposure route (inhalation, skin, eyes, ingestion), symptoms, medical attention notes |
| 5 | Fire-Fighting Measures | Suitable extinguishing media, specific hazards from the chemical, special protective equipment for firefighters |
| 6 | Accidental Release Measures | Personal precautions, containment and cleanup methods for spills |
| 7 | Handling and Storage | Safe handling practices, incompatible materials, storage conditions and temperature |
| 8 | Exposure Controls/PPE | Occupational exposure limits (OELs), engineering controls, required PPE type and specifications |
| 9 | Physical and Chemical Properties | Appearance, odor, pH, flash point, boiling point, vapor pressure, solubility |
| 10 | Stability and Reactivity | Chemical stability, conditions to avoid, incompatible materials, hazardous decomposition products |
| 11 | Toxicological Information | Routes of exposure, acute and chronic toxicity data, LD50/LC50 values, carcinogenicity status |
| 12 | Ecological Information | Aquatic toxicity, persistence, bioaccumulation (not enforced by OSHA but part of GHS format) |
| 13 | Disposal Considerations | Waste disposal methods and contaminated packaging guidance |
| 14 | Transport Information | DOT, IATA, and IMDG shipping classifications and UN numbers |
| 15 | Regulatory Information | US regulatory status (TSCA, SARA, CERCLA, state regulations) |
| 16 | Other Information | Date of SDS preparation/revision, version number, abbreviations used |
Employer Obligations Under HazCom
The Hazard Communication Standard places specific requirements on employers who use hazardous chemicals. Here's what your obligations look like in practice.
Written hazard communication program
Every employer with hazardous chemicals must have a written HazCom program. It should describe how the employer will meet the requirements for labels, SDSs, and employee training. The program must include a list of all hazardous chemicals in the workplace (the chemical inventory) and explain how SDSs are obtained, maintained, and made accessible. The written program should also address non-routine tasks involving chemical exposure and how contractors are informed about chemical hazards in shared work areas.
SDS accessibility
SDSs must be readily accessible to employees during each work shift when they're in their work areas. Electronic access is allowed as long as employees can get to the SDSs immediately without delays. If the electronic system goes down, a backup method must be available. Employees can't be required to ask a supervisor for permission to view an SDS. They should be able to access any SDS they need at any time. For remote or traveling employees who may encounter chemical hazards, the employer must ensure access at those locations too.
Training requirements
Employees must be trained on how to read and interpret SDSs before working with or near hazardous chemicals. Training should cover the 16-section format, how to find specific information (first aid, PPE requirements, exposure limits), the physical and health hazards of chemicals in their work area, protective measures, and how to access SDSs in their workplace. Retrain when new chemicals are introduced or when an employee moves to a role with different chemical exposures.
How to Manage SDSs Effectively
With hundreds or thousands of chemical products in a typical facility, SDS management can quickly become chaotic without a system.
Chemical inventory
Start with a complete inventory of every hazardous chemical in the facility. Include the product name, manufacturer, where it's used, and the quantity on hand. This inventory drives your SDS collection: every chemical on the list needs a current SDS. Review the inventory at least annually and update it when new chemicals are introduced, old ones are phased out, or manufacturers reformulate products.
Electronic SDS management systems
Paper binders worked decades ago, but electronic SDS management is now the standard for most employers. Systems like SDS Vault, Chemwatch, VelocityEHS, and MSDSonline host cloud-based SDS libraries that are searchable by product name, manufacturer, or CAS number. They track SDS currency (SDSs must be updated within 3 months of new hazard information), send alerts when updates are available, and provide access from any device. The key requirement is reliability. If the system goes down, employees still need immediate access.
Keeping SDSs current
There's no expiration date on an SDS, but manufacturers must update them within 3 months of learning new significant information about a chemical's hazards. Employers should verify they have the most recent version for each product. When you receive a shipment, check if the SDS has been revised since your last order. Electronic management systems automate this by pulling updated sheets from manufacturer databases. For chemicals that have been in your inventory a long time without a shipment, reach out to the manufacturer periodically to confirm your SDS is still current.
How to Read an SDS: Key Sections for HR and Safety Teams
You don't need to memorize all 16 sections, but certain sections are critical for daily safety decisions.
Section 2: Hazard identification
This is the most important section for a quick understanding of the chemical's dangers. Look at the signal word ('Danger' is more severe than 'Warning'), the GHS pictograms (flame, skull and crossbones, exclamation mark, health hazard, etc.), and the hazard statements (H-statements like 'H302: Harmful if swallowed'). This section tells you at a glance how dangerous the product is and through which routes (skin, inhalation, ingestion, eyes).
Section 8: Exposure controls and PPE
This section specifies the occupational exposure limits (OELs), what engineering controls should be in place (ventilation, fume hoods), and what PPE workers must wear when handling the chemical. It's the primary link between the SDS and your PPE program. If Section 8 says 'wear chemical-resistant gloves (nitrile, minimum 8 mil thickness),' that's what your workers need. Generic disposable gloves won't meet the requirement.
Section 4: First-aid measures
When an exposure incident occurs, this section tells first responders exactly what to do. It covers first-aid measures by exposure route: inhalation (move to fresh air), skin contact (wash with soap and water), eye contact (flush with water for 15 minutes), and ingestion (do not induce vomiting unless directed). It also lists symptoms to watch for and whether immediate medical attention is needed. Post this information at eyewash stations and first-aid kits for the chemicals used in that area.
GHS Labels and Their Connection to SDSs
Container labels and SDSs work together as part of the Hazard Communication system. Labels provide a quick hazard summary, while the SDS provides the full details.
| GHS Pictogram | Hazard Category | Example Chemicals | Key SDS Sections |
|---|---|---|---|
| Flame | Flammable gases, liquids, solids, aerosols | Acetone, ethanol, propane | Sections 2, 5, 7, 9 |
| Skull and Crossbones | Acute toxicity (fatal or toxic) | Methanol (high concentration), sodium cyanide | Sections 2, 4, 8, 11 |
| Exclamation Mark | Irritant, skin sensitizer, acute toxicity (harmful) | Dilute acids, many cleaning products | Sections 2, 4, 8 |
| Health Hazard | Carcinogen, respiratory sensitizer, reproductive toxicity, organ toxicity | Benzene, formaldehyde, silica dust | Sections 2, 8, 11 |
| Corrosion | Corrosive to metals, skin, or eyes | Sulfuric acid, sodium hydroxide | Sections 2, 4, 8, 10 |
| Environment | Hazardous to aquatic environment | Pesticides, some heavy metal compounds | Sections 2, 6, 12, 13 |
| Gas Cylinder | Gases under pressure | Compressed nitrogen, oxygen cylinders | Sections 2, 5, 7, 9 |
Common SDS and HazCom Violations
Hazard Communication is perennially one of OSHA's most-cited standards. These are the failures that trigger the most citations.
- No written HazCom program. This is the most basic requirement, and it's still the most common violation. Every employer with hazardous chemicals needs one.
- Missing SDSs. If a chemical is in the workplace, its SDS must be too. 'We couldn't get one from the manufacturer' isn't an acceptable excuse. Don't use the product until you have the SDS.
- SDSs not accessible to employees. Locked offices, password-protected computers without employee access, or binders in a different building don't meet the 'readily accessible' standard.
- No employee training on HazCom. Employees must be trained before they work with or near hazardous chemicals. 'They should know this stuff' isn't training.
- Missing container labels. Secondary containers (spray bottles, buckets, smaller containers filled from bulk supplies) must be labeled with the product identity and hazard warnings. Unlabeled containers are one of the easiest violations for an inspector to spot.
- Outdated SDSs that don't reflect the current GHS format. SDSs from before 2015 that still use the old MSDS format should have been replaced years ago.
SDS and Hazard Communication Statistics [2026]
Data on HazCom compliance, chemical exposures, and the scope of SDS requirements in US workplaces.
Frequently Asked Questions
Do SDSs expire?
What's the difference between an SDS and an MSDS?
Do I need SDSs for consumer products?
Can employees request copies of SDSs?
Who is responsible for creating SDSs?
How should SDSs be organized in the workplace?
Written by Adithyan RK