Chemicals are used in industry for among others in chemical synthesis, cleaning, cooling and surface treatment . Also, they are transported on the roads, at sea and in air. All in all chemicals propose a risk for people and environment in case of an accident with spillage.
There are many different ways of classifying chemicals. One way is to look at which form the chemical has in normal temperaure and pressure:
Organic - inorganic
Chemicals that are only constructed from carbon and hydrogen atoms are referred to as "Organic" whereas chemicals that also include metal atoms (sodium, iron, aluminum), halogen atoms (chlorine, fluorine), sulphur or silica is referred to as "Inorganic".
Another way to divide chemicals is to look at their different properties, which for example makes them react differently in contact with for example water, high temperatures and pressure.
||Sulphuric acid, Acetic acid
|Base / Alkali
||Sodium hydroxide, Ammonia
||Etylether, Tetrahydrofuran (THF)