BS EN 891:2004 pdf download.Chemicals used for treatment of water intended for human consumption – Iron (III) chloride 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:
a) this document provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA;
b) 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 standard 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 891 is applicable to iron (Ill) chloride sulfate used for treatment of consumption. It describes the characteristics of iron (Ill) sulfate and specifies corresponding analytical methods for iron (Ill) chloride sulfate (analytical methods are information on its use in water treatment. It also determines the rules relating to safe chloride sulfate (see annex E).
water intended for human the requirements and the given in Annex B) and gives handling and use of iron (Ill).
2 Normative references
EN 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 5790:1979, Inorganic chemical products for industrial use – General method for determination of chloride content – Mercurimetric method.
ISO 6206, Chemical products for industrial use – Sampling — Vocabulary.
4 Purity criteria
4.1 General
This document specifies the minimum purity requirements for iron (Ill) chloride sulfate 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, this shall be notified to the user and when necessary to relevant authorities.
NOTE Users of this product should check the national regulations in order to clarity 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 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 891 pdf download.