Which action is part of using an SDS to fully understand the hazards of a chemical?

• A. Compare label info to ensure you have the right SDS
• B. Determine the hazard class: corrosive, flammable, etc
• C. Look up procedures for safe handling
• D. Check the packaging color to guess hazards

Answer: (B)

Understanding the hazards of a chemical from an SDS starts with identifying its hazard class. The hazard class tells you what kind of danger the substance poses—whether it’s flammable, corrosive, toxic, reactive, or something else—and this classification is given in the Hazards Identification section. Knowing the exact hazard class immediately guides what precautions are needed, such as the type of protective equipment, ventilation, storage conditions, and emergency measures.

Other actions don’t directly reveal the hazards themselves: comparing labels to ensure you have the right SDS is about matching documents, not about understanding the risks; looking up safe handling procedures is important, but those procedures are based on the hazard information you obtain once you know the class; and relying on packaging color to infer hazards is unreliable and not standardized.