This European Standard is applicable to sodium hydrogen sulfite used for treatment of water intended for human consumption. It describes the characteristics of sodium hydrogen sulfite and specifies the requirements and the corresponding test methods for sodium hydrogen sulfite. It gives information on its use in water treatment.
EN 12120:2012 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 418:2001 Photography - Processing chemicals - Specifications for anhydrous sodium sulfite
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 9297:1989 Water quality; determination of chloride; silver nitrate titration with chromate indicator (Mohr's method)
EN 12120:2012 history
2012EN 12120:2012 Chemicals Used for Treatment of Water Intended for Human Consumption - Sodium Hydrogen Sulfite
2005EN 12120:2005 Chemicals Used for Treatment of Water Intended for Human Consumption - Sodium Hydrogen Sulfite
1998EN 12120:1998 Chemicals Used for Treatment of Water Intended for Human Consumption - Sodium Hydrogen Sulfite