Which item among the following is a required permanent marking related to the aerosol dispersing medium on the container?

• A. Type and net weight of halocarbon-dispersing medium or pressure level
• B. Type and net weight of aerosol-forming material
• C. Date of manufacture
• D. Name of the installer

Answer: (A)

The main idea here is that the container must clearly identify what propellant is used to disperse the agent and how much of it is present. The aerosol dispersing medium (the propellant) is what carries and delivers the extinguishing material when the device is discharged, so knowing its type and the amount (or the associated pressure level) is essential for proper service, recharging, and safety verification. That’s why the required permanent marking specifies the type and net weight of the halocarbon-dispersing medium, or the pressure level.

The other items don’t fit this specific requirement. The aerosol-forming material describes the agent itself, not the dispersing medium, so it isn’t the mandated permanent marking about what carries the agent. The date of manufacture and the installer’s name may appear elsewhere, but they aren’t the permanent marking related to the dispersing medium itself.