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
Compass
COMPASS
Maintain inventory list and MSDS, Prevent Spills, DO NOT STOCK PILE, DISCARD EMPTY CONTAINERS
The correct spelling is "recognition."
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.
Hazardous.
The correct spelling is dangerous (hazardous).
The correct spelling is "dangerous" (hazardous).
The correct spelling is dangerous (risky, hazardous).
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.
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.
Forensic scientists may be exposed to hazardous materials and possibly dangerous pathogens. With correct safety measures the risks of suffering contamination or infection will go down a lot.
Packages must meet specific weight and size limits, be properly sealed and labeled, and not contain prohibited items such as hazardous materials. The address and postage must be clear and correct for delivery.