Hazard Communication & SDS: How to Read Safety Data Sheets and GHS Labels in the Workplace

In many workplaces—whether construction sites, manufacturing plants, warehouses, or offshore environments—employees regularly work with hazardous substances. Cleaning agents, fuels, solvents, lubricants, and adhesives are common materials that can pose serious health or safety risks if handled incorrectly. For this reason, OSHA’s Hazard Communication Standard requires that workers have access to clear labeling and chemical safety information.

However, regulations alone do not guarantee safety. Workers also need to understand how to read chemical labels and how to find the most important information in a Safety Data Sheet (SDS). Being able to quickly recognize hazards and respond appropriately helps prevent accidents and improves workplace safety.

Understanding Hazard Communication

Hazard communication, often referred to as HazCom, is OSHA’s system for identifying and communicating chemical hazards in the workplace. Its purpose is to ensure that employees know what chemicals they are working with, the risks those chemicals pose, and the precautions necessary to prevent exposure.

The standard follows the Globally Harmonized System (GHS) for classification and labeling. This international system standardizes hazard symbols, warning words, and safety information so workers can recognize chemical risks regardless of the manufacturer or industry.

How to Read GHS Labels

Chemical containers use standardized GHS labels to communicate hazards quickly. These labels contain several key elements that workers should recognize immediately.

The product identifier specifies the name of the chemical. A signal word, such as Danger or Warning, indicates the severity of the risk. Labels also include hazard statements describing potential dangers and precautionary statements that explain how to handle or store the substance safely.

One of the most recognizable parts of the label is the pictogram, a red diamond symbol representing specific hazards like flammability, toxicity, or environmental damage. Supplier information is also included so workers can identify the manufacturer or request further details if necessary.

For example, a solvent used for cleaning equipment may display a flame pictogram indicating flammability, along with instructions to keep the substance away from heat sources and wear protective gloves.

Using Safety Data Sheets (SDS)

While labels provide quick warnings, Safety Data Sheets offer detailed information about each chemical. OSHA requires that SDS documents be accessible to employees at all times.

Each SDS follows a standardized 16-section format. Some sections are especially important for workers handling chemicals:

• Hazards Identification explains the risks associated with the substance

• First Aid Measures describes what to do in case of exposure

• Handling and Storage outlines safe working conditions

• Exposure Controls / PPE lists recommended protective equipment

Understanding where to find this information allows workers to respond quickly during an incident and avoid unsafe handling practices.

Why Hazard Communication Matters

Effective hazard communication protects both employees and employers. OSHA requires that workers receive training on chemical hazards so they understand the risks present in their workplace. When employees are familiar with labels and SDS documents, they are more likely to follow safe procedures and recognize dangerous situations before they escalate.

Proper communication also helps organizations maintain compliance during OSHA inspections. Inadequate labeling, missing SDS documents, or untrained employees can lead to violations and significant penalties.

Building Strong Safety Habits

Good hazard communication practices should be part of everyday workplace safety. Safety Data Sheets should always be accessible—either digitally or in clearly organized binders—and employees should be trained to consult them whenever they encounter unfamiliar chemicals.

Workplaces can reinforce awareness by posting GHS pictogram charts in storage areas and ensuring that all containers, including secondary bottles or tanks, are properly labeled. Regular safety meetings or toolbox talks can also help employees stay familiar with chemical hazards and safe handling procedures.

Conclusion

OSHA’s Hazard Communication Standard is designed to ensure that workers understand the chemicals they encounter on the job. But real safety comes from knowing how to apply that information. When employees can interpret GHS labels and navigate Safety Data Sheets confidently, they are better prepared to prevent exposure, respond to emergencies, and work safely around hazardous materials.

Training programs that cover hazard communication in depth help workers build these skills and create safer workplaces across industries.