Chlorine Halogen oxidizer; water treatment; chlorination 🏗️ Materials PDB source ↓ Drag to rotate · scroll to zoom 3D viewer requires JavaScript. Static renders available below. Structure Formula Cl2 Molecular weight 70.900 g/mol Heavy atoms 2 Total atoms 2 Composition Cl ×2 SMILES ClCl ⧉ Copy Class Inorganic