BS EN 900:2007 pdf free.Chemicals used fortreatment of waterintended for humanconsumption — Calcium hypochlorite.
BS EN 900 This European Standard is applicable to calcium hypochlorite used for the treatment of water intended for humanconsumption. It describes the characteristics of calcium hypochlorite and specifies the requirements and thecorresponding test methods for calcium hypochlorite. It provides information on its use in water treatment. It alsodetermines the rules relating to safe handling and use of calcium hypochlorite (see Annex B).
The following referenced documents are indispensable for the application of this document. For dated references,only the edition cited applies. For undated references, the latest edition of the referenced document (includingamendments) applies.
EN 1483, Water quality – Determination of mercury – Method using atomic absorption spectrometryEN ISO 3696, Water for analytical laboratory use – Specification and test methods (ISO 3696:1987)ISO 3165,Sampling of chemical products for industrial use – Safety in sampling.
ISO 6206, Chemical products for industrial use – Sampling – Vocabulary.
Is0 8213,Chemical products for industrial use – Sampling techniques – Solid chemical products in the form ofparticles varying from ‘powders to coarse lumps.
ISO 8288, Water quality – Determination of cobalt,nickel,copper,zinc，cadmium and lead – Flame atomicabsorption spectrometric methods.
ISO 9174, Water quality – Determination of chromium – Atomic absorption spectrometric methods.
Calcium hypochlorite is a strong oxidant and chlorination agent. lt reacts with acids or acidic salts to form chlorineand can form explosive nitrogen chlorides with ammonia and ammonia compounds. In the presence of inflammablsubstances, it causes fires and explosions of organic compounds, oxidation reactions occur with the release ofheat 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 treatmentof 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 theuser, and when necessary the relevant authorities, shall be notified.
NOTE Users of the product should check the national regulations to clarify whether it is of appropriate purity for treatmentof water intended for human consumption, taking into account raw water quality, required dosage,contents of other impuritiesand 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 significantquantities from the current production process and raw materials. If in the production process or raw materials leadto significant quantities of impurities, by-products or additives being present, this shall be notfied to the user.
The product shall contain a minimum of a mass fraction of 65,5 % of calcium hypochlorite (equivalent to anavailable active chlorine content of at least a mass fraction of 65 %.
Dissolution quality, calculated as available chlorine which is obtainable within 1 min after dissolution in water, shalnot be less than a mass fraction of 45,5 %.BS EN 900 pdf download.