Category 3 and 4 flammables, previously identified as “combustibles,” have higher flash points than category 1 and 2 flammables, which means that they require higher temperatures to produce vapors that will ignite and burn if an ignition source is present. To safely store and handle combustible liquids, make sure you read and understand their labels and safety data sheets, and fully understand their hazards. Also follow the combustible liquid storage and handling best practices in this course and for your workplace.
• Define the terms “flash point” and “boiling point”
• Differentiate between “combustibles” and “flammables”
• Describe how flammables and combustibles are categorized
• Describe the workplace requirements for hazardous chemicals in OSHA’s HazCom Standard
• Describe how flammability is indicated on chemical labels
• Identify the characteristics of combustibles which make them especially hazardous
• List storage and handling best practices for combustibles
