67/548/EEC Council Directive on the Approximation of Laws, Regulations and Administrative Provisions Relating to the Classification, Packaging and Labelling of Dangerous Substances ((Amended by 79/831/EEC, 96/56/EC, and 96/C 73/08))
98/83/EC COUNCIL DIRECTIVE on the quality of water intended for human consumption
EN 897 Chemicals used for treatment of water intended for human consumption - Sodium carbonate*, 2023-12-23 Update
BS EN 15362:2014 history
2014BS EN 15362:2014 Chemicals used for treatment of swimming pool water. Sodium carbonate
2008BS EN 15362:2007 Chemicals used for treatment of swimming pool water - Sodium carbonate