What is BS EN 1421 - Ammonium chloride about?
BS EN 1421 is the European standard that covers the chemicals used for the treatment of water intended for human consumption.
In particular, this standard applies to ammonium chloride used for the treatment of water intended for human consumption. It describes the characteristics and specifies the requirements of ammonium chloride and refers to the corresponding analytical methods and determines the rules relating to the safe handling and use of ammonium chloride.
Who is BS EN 1421 - Ammonium chloride for?
BS EN 1421 on ammonium chloride used for the treatment of water intended for human consumption is useful for:
- Water analysis laboratories
- Government agencies and research centres 
- Water treatment plants
- Water suppliers
Why should you use BS EN 1421 - Ammonium chloride?
Ammonium chloride is a systemic and urinary acidifying salt. It helps maintain pH and exerts a mild diuretic effect. Too much use of ammonium chloride in water treatment can cause irritation, shortness of breath, cough, nausea, and headache.
BS EN 1421 provides methods for the treatment of water so that the insoluble matters and impurities are within safe limits for human consumption.
It specifies the minimum purity requirements for ammonium chloride used for the treatment of water intended for human consumption. Depending on the raw material and the manufacturing process other impurities may be present and, if so, this shall be notified to the user and when necessary to relevant authorities.
BS EN 1421 also gives guidance on the labelling, transportation, and storage of the product so that the purity is not affected. It helps to avoid potential adverse effects on the quality of water intended for human consumption.
What is changed since the last update?
BS EN 1421:2012 supersedes BS EN 1421:2005 which is withdrawn.
BS EN 1421:2012 modification of 6.2 on labelling, deletion of the reference to EU Directive 80/778/EEC of 15 July 1980 in order to take account of the latest Directive in force with respect to BS EN 1421:2005.
