BS EN 935:2004 pdf download.Chemicals used for treatment of water intended for human consumption – Aluminium iron(III) chloride (monomeric) and aluminium iron(III) chloride hydroxide (monomeric).
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 935 is applicable to aluminium iron (Ill) chloride (monomeric) and aluminium iron (Ill) chloride hydroxide (monomeric) used for treatment of water intended for human consumption. It describes the characteristics and specifies the requirements for aluminium iron (Ill) chloride (monomeric) and aluminium iron (Ill) chloride hydroxide (monomeric) and refers to the corresponding test methods. It gives information on their use in water treatment. It also determines the wles relating to safe handling and use of aluminium iron (Ill) chloride (monomeric) and aluminium iron (Ill) chloride hydroxide (monomeric) (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.
3 Description
3.1 Identification
3.1.1 Chemical name
a) Aluminium iron (Ill) chloride (monomeric);
b) Aluminium iron (Ill) chloride hydroxide (monomeric).
3.1.2 Synonym or common names
For aluminium iron (Ill) chloride hydroxide (monomeric): bauxite or clay hydroxide chloride.
3.1.3 Relative molecular mass Variable (see 3.1.4).
4 Purity criteria
4.1 General
This document specifies the minimum purity requirements for aluminium iron (Ill) chloride (monomeric) and aluminium iron (Ill) chloride hydroxide (monomeric) used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the products. 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 these products 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 products 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 processes and raw materials, If the production process or raw materials leads to significant quantities of impurities, by-products or additives being present, this shall be notified to the user.BS EN 935 pdf download.