BS EN 900:2014 pdf free.Chemicals used for treatment of water intended for human consumption – Calcium hypochlorite.
BS EN 900 This European Standard is applicable to calcium hypochlorite used for the treatment of water intended for human consumption. It describes the characteristics of calcium hypochlorite and specifies the requirements and the corresponding test methods for calcium hypochlorite. It provides information on its use in water treatment. It also determines the rules relating to safe handling and use of calcium hypochlorite (see Annex B).
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 3696, Water for analytical laboratory use – Specification and test methods (ISO 3696) EN ISO 12846:2012, Water quality – Determination of mercury – Method using atomic absorption spectrometry (AAS) with and without enrichment (ISO 12846:2012)
ISO 3165, Sampling of chemical products for industrial use — Safety in sampling
ISO 6206, Chemical products for industrial use — Sampling — Vocabulary
ISO 8213, Chemical products for industrial use—Sampling techniques — Solid chemical products in the form of particles varying from powders to coarse lumps
ISO 8288, Water quality—Determination of cobalt, nickel, copper, zinc, cadmium and lead — Flame atomic absorption spectrometric methods
ISO 9174, Water quality—Determination of chromium—Atomic absorption spectrometric methods.
Solutions of calcium hypochlorite are alkaline. The pH value of a solution of concentration 10 g/l is about 11,5 at25 °C.
Calcium hypochlorite is a strong oxidant and chlorination agent. It reacts with acids or acidic salts to form chlorine, and can form explosive nitrogen chlorides with ammonia and ammonia compounds. In the presence of inflammable substances, it causes fires and explosions of organic compounds, oxidation reactions 0ccur with the release of heat and of moisture, and it is also highly corrosive to most metals.
This European Standard specifies the minimum purity requirements for calcium hypochlorite used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the product. Depending on the raw material and the manufacturing process other impurities may be present and if so, then the user, and when necessary the relevant authorities, shall be notified.
Users of the product should check the national regulations to clarify whether it is of appropriate purity for treatment of water intended for human consumption, taking into account raw water quality, required dosage, contents of other impurities and additives used in the product not stated in this product standard.Limits have been given for impurities and chemical parameters where these are likely to be present in significant quantities from the current production process and raw materials. If in the production process or raw materials lead to significant quantities of impurities, by-products or additives being present, this shall be notified to the user.BS EN 900 pdf download.