BS-EN-885-2001.pdf

BRITISH STANDARD BS EN 885:2001 Chemicals used for treatment of water intended for human consumption Polyaluminium chloride hydroxide silicate The European Standard EN 885:2001 has the status of a British Standard ICS 71.100.80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 885:2001 This British Standard, having been prepared under the direction of the Materials and Chemicals Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 2 July 2002 © BSI 2 July 2002 ISBN 0 580 40008 5 National foreword This British Standard is the official English language version of EN 885:2001. The UK participation in its preparation was entrusted to Technical Committee CII/59, Chemicals for drinking water treatment, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Additional information Article 10 of the Council of the European Community Directive 98/83/EC on the quality of water intended for human consumption requires Member States to ensure that substances and materials (including associated impurities) used in the preparation of drinking water do not remain in treated water at concentrations that are higher than necessary or that would reduce the protection of public health provided for in the Directive. This requirement is given effect in England and Wales by regulation 25 of the Water Supply (Water Quality) Regulations 1989 (similar provisions apply in Scotland and Northern Ireland). Regulation 25 makes provision for attaching conditions of use to chemicals and filter media that are authorized for use in public water supplies. Details of conditions of use are contained in the List of Products and Processes Approved Under Regulations 25 and 26 For Use In Connection With The Supply Of Water For Drinking, Washing, Cooking And Food Production Purposes published by the Drinking Water Inspectorate, Floor 2/A1, Ashdown House, 123 Victoria Street, London SW1E 6DE (www.dwi.gov.uk). Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users of this publication are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 15 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 885 October 2001 ICS 71.100.80 English version Chemicals used for treatment of water intended for human consumption - Polyaluminium chloride hydroxide silicate Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Polyhydroxychlorosilicate d'aluminium Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Polyaluminiumhydroxidchloridsilikat This European Standard was approved by CEN on 2 September 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2001 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 885:2001 E Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 885:2001 (E) 2 Contents page Foreword3 Introduction.4 1Scope 5 2Normative references 5 3Description .5 3.1Identification.5 3.2Commercial form6 3.3Physical properties6 3.4Chemical properties 7 4Purity criteria7 4.1General7 4.2Composition of commercial product.7 4.3Impurities and main by-products.7 4.4Toxic substances.8 5Test methods8 5.1Sampling.8 5.2Analyses .9 6Labelling - Transportation - Storage9 6.1Means of delivery.9 6.2Risk and safety labelling according to the EU-Directives .10 6.3Transportation regulations and labelling10 6.4Marking .11 6.5Storage11 Annex A (informative) General information on polyaluminium chloride hydroxide silicate 12 Annex B (normative) General rules relating to safety14 Bibliography15 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 885:2001 (E) 3 Foreword This document has been prepared by Technical Committee CEN /TC 164, “Water supply“, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2002, and conflicting national standards shall be withdrawn at the latest by April 2002. This European Standard refers to the EU Directive 80/778/EC (see 1) of 15 July 1980, however it will be revised in future in order to take account of the new EU Directive 98/83/EC (see2). Annex A is informative. Annex B is normative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 885:2001 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this standard : 1) this standard provides no information as to whether the product may be used without restriction 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. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 885:2001 (E) 5 1 Scope This European Standard is applicable to polyaluminium chloride hydroxide silicate used for treatment of water intended for human consumption. It describes the characteristics of polyaluminium chloride hydroxide silicate and specifies the requirements for polyaluminium chloride hydroxide silicate and refers to the analytical methods. It also gives information on its use in water treatment. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate place in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). 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 Polyaluminium chloride hydroxide silicate. 3.1.2 Synonym or common name Polyaluminium silicate chloride. 3.1.3 Relative molecular mass Variable (see 3.1.4). 3.1.4 Empirical formula Al(Na)d(OH)a(SiOx)cClb with a + b + 2c (x 2) = 3 + d and a = 1,05 to 2,4 b = 0,5 to 3 c = 0,01 to 0,3 d = 0,005 to 2 x ? 2 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 885:2001 (E) 6 3.1.5 Chemical formula Variable (see 3.1.4). 3.1.6 CAS Registry Number1) Aluminium chloride hydroxide silicate : 94894-80-1. 3.1.7 EINECS reference2) The following is a list of EINECS reference numbers for products or their starting materials. Aluminium hydroxide chloride : 215-477-2. Aluminosilicate : 215-475-1. Sodium chloride : 231-598-3. 3.2 Commercial form The product is available as a liquid. 3.3 Physical properties 3.3.1 Appearance Polyaluminium chloride hydroxide silicate is a colourless to yellow, clear liquid. 3.3.2 Density The density depends on the particular composition, especially the aluminium ion content, expressed as percentage by mass (% (m/m) of aluminium. Typical values are 1,20 g/ml to 1,25 g/ml for Al 5,3 % (m/m). 3.3.3 Solubility in water Polyaluminium chloride hydroxide silicate is fully miscible with water. NOTEDepending on the particular product, dilute solutions can hydrolyse and form a precipitate. 3.3.4 Vapour pressure at 20 °C Not known. 3.3.5 Boiling point at 100 kPa3) 100 °C. 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. 3) 100 kPa = 1 bar. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 885:2001 (E) 7 3.3.6 Crystallization point Typical value is - 10 °C for Al 5,3 % (m/m). 3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) Typical value is 15 mPa.s for Al 5,3 % (m/m) at 20 °C. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties Polyaluminium chloride hydroxide silicate is an acidic liquid which hydrolyses and forms a precipitate of aluminium hydroxide when diluted beyond a particular concentration. NOTESince aluminium compounds are amphoteric in nature, the solubility of aluminium depends on the pH value and the product should be used within an appropriate pH range. 4 Purity criteria 4.1 General Limits have been given for impurities and toxic substances where these are likely to be present in significant quantities from the current production process and raw materials. If a change in the production process or raw materials leads to significant quantities of other impurities or by-products being present, this shall be notified to the user. 4.2 Composition of commercial product The concentration of active matter expressed as grams of aluminium per kilogram of product (Al g/kg) shall be not less than 50 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/3Al shall be greater than 0,35. 4.3 Impurities and main by-products The content of insoluble matter shall not exceed 25 g/kg Al. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 885:2001 (E) 8 4.4 Toxic substances The content of toxic substances shall conform to the requirements specified in Table 1. Table 1 Toxic substances Limit (mg/kg of Al) Parameter Type 1Type 2Type 3 Arsenic (As)max.1440100 Cadmium (Cd)max.350100 Chromium (Cr)max.307001 000 Mercury (Hg)max.41020 Nickel (Ni)max.207001 000 Lead (Pb)max.40200800 Antimony (Sb)max.2040120 Selenium (Se)max.2040120 NOTECyanide (CN-) is usually not relevant because of the acidity of the product. Pesticides and polycyclic aromatic hydrocarbons are not relevant since the raw materials used in the manufacturing process are free of them. 5 Test methods 5.1 Sampling Observe the general rules of ISO 3165 and take account of ISO 6206. 5.1.1 Sampling from drums and bottles 5.1.1.1 General 5.1.1.1.1Mix the contents of the container to be sampled by shaking the container, by rolling it or by rocking it from side to side, taking care not to damage the container or spill any of the liquid. 5.1.1.1.2If the design of the container is such (for example, a narrow-necked bottle) that it is impracticable to use a sampling implement, take a sample by pouring after the contents have been thoroughly mixed. Otherwise, proceed as described in 5.1.1.3. 5.1.1.1.3Examine the surface of the liquid. If there are signs of surface contamination, take samples from the surface as described in 5.1.1.2; otherwise, take samples as described in 5.1.1.3. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 885:2001 (E) 9 5.1.1.2 Surface sampling Take a sample using a suitable ladle. Lower the ladle into the liquid until the rim is just below the surface, so that the surface layer runs into it. Withdraw the ladle just before it fills completely and allow any liquid adhering to the ladle to drain off. If necessary, repeat this operation so that, when the other selected containers have been sampled in a similar manner, the total volume of sample required for subsequent analysis is obtained. 5.1.1.3 Bottom sampling Take a sample using an open sampling tube, or a bottom-valve sampling tube, suited to the size of container and the viscosity of the liquid. When using an open sampling tube, close it at the top and then lower the bottom end to the bottom of the container. Open the tube and move it rapidly so that the bottom of the tube traverses the bottom of the container before the tube is filled. Close the tube, withdraw it from the container and allow any liquid adhering to the outside of the tube to drain off. When using a bottom-valve sampling tube, close