What type of information is indicated on a substances placard or label?

• A. Emergency contact numbers
• B. Hazardous characteristics of the material
• C. Manufacturer's details
• D. Storage instructions

Answer: (B)

A substance's placard or label primarily serves to communicate essential information about its hazardous characteristics. This includes details such as the nature of the hazards associated with the material, such as whether it is flammable, corrosive, toxic, or reactive. By clearly indicating these characteristics, the placard or label helps ensure that anyone handling the material is aware of the risks and can take appropriate safety measures.

While other options contain valuable information, they do not typically appear on a placard or label. Emergency contact numbers, for instance, may be provided in a safety data sheet (SDS) but are not standard on a label. Similarly, manufacturer's details and storage instructions are important for managing chemicals but are generally not communicated through a placard. Therefore, focusing on the hazardous characteristics is crucial as it directly relates to safety protocols when dealing with chemical substances.