*Chlorine — Cl2*
It’s a chemical element you’ve definitely used before, even if you didn’t know it.
# *1. Quick Facts*
**Property** **Detail**
**Element** Chlorine
**Symbol** Cl
**Gas at room temp** Yellow-green gas
**Smell** Sharp, bleach-like, choking
**State** Gas. But we use it as liquid or in compounds
# *2. Where You See Chlorine Daily*
1. *Water treatment* - 90% of tap water in Lagos and worldwide is disinfected with chlorine. Kills bacteria
2. *Bleach* - Household bleach = Sodium hypochlorite NaOCl. Made from chlorine
3. *Swimming pools* - Chlorine tablets/powder to keep pool water clean
4. *PVC Plastics* - Pipes, cables, buckets. ∼50% of chlorine goes to PVC
5. *Cleaning products* - Toilet cleaners, disinfectants
6. *Paper & Textiles* - To bleach paper white