BS EN 886:2004 pdf download.Chemicals used for treatment of water intended for human consumption – Polyaluminium hydroxide silicate sulfate.
Introduction
In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this document:
1) this document provides no information as to whether the product may be used without restnction in any of the Member States of the EU or EFTA;
2) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force.
NOTE: Conformity with this document does not confer or imply acceptance or approval of the product in any of the Member
States of the EU or EFTA. The use of the product covered by this document is subject to regulation or control by National Authorities.
BS EN 886 is applicable to polyaluminium hydroxide silicate sulfate used for treatment of water intended for human consumption. It describes the characteristics of polyaluminium hydroxide silicate sulfate and specifies the requirements for polyaluminium hydroxide silicate sulfate and refers to the corresponding analytical methods. It gives information on its use in water treatment. It also determines the wies to safe handling and use of polyaluminium hydroxide silicate sulfate (see annex B).
2 Normative references
EN 1302, Chemicals used for treatment of water intended for human consumption – Aluminium based coagulants – Analytical methods.
Iso 3165, Sampling of chemical products for industrial use – Safety in sampling.
Iso 6206, Chemical products for industrial use – Sampling — Vocabulary.
4.2 Composition of commercial product
The concentration of active matter (aluminium ion content) in the product expressed as grams per kilogram of product shall be not less than 40 g/kg.
The content of aluminium shall be within ± 3 % of the manufacturer’s declared value. The relative basicity expressed as the mole ratio OH/3A1 shall be greater than 0,35.
4.3 Impurities and main by-products
The content of insoluble matter shall not exceed 25 g/kg of Al.
4.4 Chemical parameters
The product shall conform to the requirements specified in Table 1.BS EN 886 pdf download.