What information is critical to have readily available in case of a hazardous materials leak?

Answer: B — Safety Data Sheet (SDS) for the material

Having a Safety Data Sheet (SDS) readily available in the event of a hazardous materials leak is crucial because it contains vital information regarding the substance involved. The SDS provides detailed data on the chemical composition, potential hazards, safe handling practices, first aid measures, spill response procedures, and information about how to properly dispose of the material. In an emergency situation, having this information at hand allows responders to act quickly and effectively to mitigate risks to health and safety. The other options, while they may contain relevant information for specific contexts, do not provide the immediate and comprehensive guidance that an SDS offers in the case of a hazardous materials incident. For example, the material’s expiration date or insurance information may not be relevant in an emergency response situation, while the manufacturer’s contact information may be useful later for further inquiries but does not provide the actionable guidance necessary for immediate response.