What is a major advantage of M8 and M9 papers?

• A. Chemical warfare agents
• B. Bacteria
• C. Base vapors
• D. Heavy metals

Answer: (A)

M8 and M9 papers are fast, field-screening tools that give a quick colorimetric readout indicating the possible presence of chemical warfare agents on surfaces or in the environment. The major advantage is that responders can recognize a chemical threat within minutes and make immediate protective decisions and start decontamination, without waiting for lab confirmation. They’re specifically designed to detect chemical warfare agents, such as nerve and blister agents, not biological agents, base vapors, or heavy metals, which is why this option fits best. Keep in mind these papers provide rapid screening, not definitive identification, and should be used in conjunction with other assessment methods.