Why is soap preferred over solvents for removing OC residues?

• A. Soap is cheaper.
• B. OC is oil-based; soap emulsifies oil and helps remove residue more effectively; solvents may spread irritants.
• C. Solvents are always safer.
• D. Soap has no cleaning effect.

Answer: (B)

OC residues are oil-based, so removing them relies on breaking up and dispersing oily material. Soap contains surfactants that reduce the tension between oil and water and form emulsions. This means the oil-based irritant is transformed into tiny droplets that can be suspended in water and washed away, leaving skin and surfaces clean without spreading the residue.

Solvents, while they can dissolve oily substances, can move the irritant around instead of removing it, increasing the chance it spreads to new areas or into sensitive tissues. Many solvents can also irritate or dry the skin and pose additional hazards if inhaled or absorbed. So soap and water provides a safer, more effective way to clear oil-based OC residues by emulsifying the oil and allowing thorough rinsing.