BS EN 12121:2022

This standard BS EN 12121:2022 Chemicals used for treatment of water intended for human consumption. Sodium disulfite is classified in these ICS categories:

• 71.100.80 Chemicals for purification of water

This document is applicable to sodium disulfite used for treatment of water intended for human consumption. It describes the characteristics of sodium disulfite and specifies the requirements and the corresponding test methods for sodium disulfite. It gives information on its use in water treatment. It also determines the rules relating to safe handling and use (see Annex B).