Question

the skull and crossbones pictogram in the hazard communication standard refers to
fatal or toxic
gases under pressure
flammables
explosives

Explanation:

The skull and crossbones pictogram is a well - known symbol in safety and hazard communication. In the context of the Hazard Communication Standard, it is specifically used to denote substances that are fatal or toxic. Gases under pressure have a different pictogram (e.g., a gas cylinder with a burst symbol in some systems). Flammables typically have a flame pictogram, and explosives have a bomb - like or explosion - related pictogram.

Answer:

Fatal or toxic