PropertyChlorine (Cl₂)Chlorine Dioxide (ClO₂)
CompositionDiatomic chlorine gasOne chlorine + two oxygen atoms
MechanismChlorinates (adds chlorine to)Oxidizes (steals electrons selectively)
ByproductsHarmful chlorinated compoundsHarmless salt + oxygen
ToxicityHighly toxicLow toxicity at controlled doses
Use in MMS/CDSNot usedThis is the active agent