This European Standard 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).
EN 12121:2012 Referenced Document
EN ISO 3696:1995 Water for Analytical Laboratory Use- Specification and Test Methods (ISO 3696 : 1987)
ISO 22743:2006 Water quality - Determination of sulfates - Method by continuous flow analysis (CFA)
ISO 3165:1976 Sampling of chemical products for industrial use; Safety in sampling
ISO 3629:2000 Photography - Processing chemicals - Specifications for potassium metabisulfite
ISO 5993:1979 Sodium hydroxide for industrial use; Determination of mercury content; Flameless atomic absorption spectrometric method
ISO 6206:1979 Chemical products for industrial use; Sampling; Vocabulary Bilingual edition
ISO 6353-1:1982 Reagents for chemical analysis; Part 1 : General test methods
ISO 8213:1986 Chemical products for industrial use; Sampling techniques; Solid chemical products in the form of particles varying from powders to coarse lumps
ISO 9297:1989 Water quality; determination of chloride; silver nitrate titration with chromate indicator (Mohr's method)
EN 12121:2012 history
2012EN 12121:2012 Chemicals used for treatment of water intended for human consumption - Sodium disulfite
2005EN 12121:2005 Chemicals used for treatment of water intended for human consumption - Sodium disulfite
1998EN 12121:1998 Chemicals Used for Treatment of Water Intended for Human Consumption - Sodium Disulfite