Reactive metals such as lithium, sodium and potassium are stored in paraffin oil to prevent reaction with the moisture in the air.
Substances that decompose easily
Substances that decompose easily in the presence of light, for example concentrated nitric acid, hydrogen peroxide solution, silver nitrate solution, liquid bromine and liquid chlorine are stored in dark bottles.
Substances with pH<5 and pH>9
Corrosive chemicals (pH<5 and pH>9) are usually stored in special storage cabinets that are
kept locked.
Heavy metals and toxic substances
Toxic substances and heavy metals should be kept in special labelled containers and kept in a locked room which is heat free
Hydrocarbons and organic solvents
Volatile and inflammable liquids like hydrocarbons and organic solvents should be stored in shady areas far from sunlight and
