*Chlorine* `Cl2` / *Chlorine-based chemicals*
aka *Bleach, Pool Chlorine, Water Disinfectant*
Chlorine is a gas, but you’ll almost never handle pure `Cl2` gas. In Nigeria we use *chlorine compounds* that release chlorine to kill germs.
# *1. Main Forms Used in Nigeria*
**Form** **Chemical** **Strength** **Best For**
**Liquid Bleach** Sodium Hypochlorite `NaOCl` 5% - 15% Water treatment, cleaning, laundry. "Jik"
**Pool Granules** Calcium Hypochlorite `Ca(OCl)2` 65% - 70% Swimming pools, shock treatment
**Pool Tablets** Trichlor `C3Cl3N3O3` 90% Slow-release for pools
**Gas** Chlorine Gas `Cl2` 100% Big water treatment plants only
# *2. Key Uses*
1. *Water Purification* - #1 use in Lagos
Kills bacteria, virus, E.coli, cholera in borehole, tank, sachet water.