Which clearing agent is neither flammable nor combustible?

• A. Chloroform
• B. Xylene
• C. Toluene
• D. Cedarwood oil

Answer: (A)

The clearing agent safety profile by flammability is the key idea here. Xylene and toluene are classic aromatic solvents with low flash points, so they ignite readily and are considered flammable. Cedarwood oil, being an essential oil, is also flammable in many safety references. Chloroform, on the other hand, is not classified as flammable or combustible in standard hazard classifications, so it does not ignite as easily under typical lab conditions. That combination of properties is why chloroform is the best choice for “neither flammable nor combustible.” (Note: chloroform is highly toxic and should be handled with proper ventilation and precautions regardless of its flammability.)