CEN/TC 164
| Registration number (WIID) | Project No. | Title | Status |
|---|---|---|---|
| 21695 | EN 891:2004 | Chemicals used for treatment of water intended for human consumption - Iron (III) chloride sulfate | Atcelts |
| 69051 | EN 891:2023 | Chemicals used for treatment of water intended for human consumption - Iron (III) chloride sulfate | Standarts spēkā |
| 6956 | EN 896:1998 | Chemicals used for treatment of water intended for human consumption - Sodium hydroxide | Atcelts |
| 24072 | EN 896:2005 | Chemicals used for treatment of water intended for human consumption - Sodium hydroxide | Atcelts |
| 36417 | EN 896:2012 | Chemicals used for treatment of water intended for human consumption - Sodium hydroxide | Izstrādē |
| 6957 | EN 897:1998 | Chemicals used for treatment of water intended for human consumption - Sodium carbonate | Atcelts |
| 24073 | EN 897:2005 | Chemicals used for treatment of water intended for human consumption - Sodium carbonate | Atcelts |
| 36429 | EN 897:2012 | Chemicals used for treatment of water intended for human consumption - Sodium carbonate | Izstrādē |
| 6958 | EN 898:1998 | Chemicals used for treatment of water intended for human consumption - Sodium hydrogen carbonate | Atcelts |
| 24074 | EN 898:2005 | Chemicals used for treatment of water intended for human consumption - Sodium hydrogen carbonate | Atcelts |
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