CSN EN 12121

CSN EN 12121 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).
Original English text of CSN EN Standard.
The price of the Standard included all amendments and correcturs.