This document is applicable to aluminium chloride (monomeric), aluminium chloride hydroxide (monomeric) and aluminium chloride hydroxide sulfate (monomeric) used for treatment of water intended for human consumption. It describes the characteristics and specifies the requirements of aluminium chloride, aluminium chloride hydroxide and aluminium chloride hydroxide sulfate (monomeric) and refers to the corresponding analytical methods. This document does not apply to any polymeric form of these salts (see EN 883). It also gives information for their use in water treatment. It also determines the rules relating to safe handling and use of these aluminium salts (see Annex B).