There is no single "correct" mnemonic. Whatever helps you remember correctly is a correct mnemonic.
Once such might be:
COMPASS - Container, Occupancy/Location, Marking/Colors, Placards/Labels, Appearance, Shipping Papers/MSDS and Senses
Maintain inventory list and MSDS, Prevent Spills, DO NOT STOCK PILE, DISCARD EMPTY CONTAINERS
"recognition"
Hazardous.
Orientation arrows are required on container labels for hazardous materials when the package is not upright during transport and the contents must remain in a specific orientation to avoid hazards. This includes materials that are liquid, fragile, or otherwise sensitive to orientation. The arrows indicate the correct upright position for the container to ensure safe handling and minimize risks. Compliance with these labeling requirements is essential for the safe transport of hazardous materials.
An container of hazardous materials must state safety instructions on the label. Any such hazardous materials must have been assessed by the company or employer before using in any manufacturing process, and any relevant safety information must be passed on to the employee as part of the training. As following safety regulations in the workplace is compulsory by law (at least in the UK), anyone (employer or employee) could find themselves in serious trouble should an accident occur. Addition note: Not only is the correct and safe use of hazardous materials important, but just as important is the safe disposal of any hazardous waste.
In-place protection This question is misleading. Evacuation is often the correct response when a hazardous material presents an immediate danger.
The mnemonic I use to remember what happened to each of Henry VIII's wives is: Divorced, beheaded, died; divorced, beheaded, survived. I use mnemonics to remember stuff.
The correct spelling is dangerous (hazardous).
The correct spelling is "dangerous" (hazardous).
The correct spelling is dangerous (risky, hazardous).
You want to use "mnemonic" if you're referring to any learning technique which aids in information retention. You'll use "pneumonic" if you're talking about anything to do with the lungs.
A common mnemonic for remembering the spelling of "Wednesday" is "Wendy’s Day," which highlights the initial sound of "Wen" and emphasizes the day of the week. Another simple mnemonic is "We’re halfway to the weekend," as it falls in the middle of the week. These phrases can help recall the correct spelling and pronunciation of the day.