BS EN 901:2007 pdf free.Chemicals used fortreatment of waterintended for humanconsumption—Sodium hypochlorite.
BS EN 901 This European Standard is applicable to sodium hypochlorite used for treatment of water intended for humanconsumption. It describes the characteristics of sodium hypochlorite and specifies the requirements and thecorresponding test methods for sodium hypochlorite. t gives information on its use in water treatment. It alsodetermines the rules relating to safe handling and use of sodium hypochlorite (see Annex B).
NOTE While this standard is not applicable to sodium hypochlorite generated in-situ (see bibliographic reference [6])the limits for impurities and chemical parameters apply.
The following referenced documents are indispensable for the application of this document.For datedreferences，only the edition cited applies. For undated references， the latest edition of the referenceddocument (including any amendments) applies.
EN 1233, Water quality – Determination of chromium – Atomic absorption spectrometric methodsEN 1483,Water quality – Determination of mercury
EN ISO 3696:1995, Water for analytical laboratory use – Specifications 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.
ISO 8288:1986,Water quality – Determination of cobalt,nickel,copper, zinc，cadmium and lead – Flameatomic absorption spectrometric methods.
This European Standard specifies the minimum purity requirements for sodium hypochlorite used for treatingwater 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, 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 fortreating water intended for human consumption, taking into account raw water quality, required dosage, contents of otherimpurities and additives used in the product that are not stated in this product standard
Limits have been given for impurities and chemical parameters where these are likely to be present insignificant quantities from the current production process and raw materials. lf in the production process orraw materiais lead to the presence of significant amounts of impurities, by-products or additives, the user shallbe notified.
Sodium hypochlorite is available only in solutions with concentrations up to 18 % active chlorine at the time ofdelivery by the producer.Common concentrated products contain a minimum of 12 % active chlorine. Dilutedsolutions are also available.
The concentration of sodium hypochlorite shall be equal to or greater than the value specified by themanufacturer.
The product contains sodium chloride (NaCl) in equimolar amounts at minimum, and a small portion of sodiumhydroxide (NaOH) which keeps the product alkaline. Thus a little amount of sodium carbonate (Na;COa) canbe present, too.BS EN 901 pdf download.