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1、BRITISH STANDARD BS EN 935:2001 Chemicals used for treatment of water intended for human consumption Aluminium iron (III) chloride (monomeric) and aluminium iron (III) chloride hydroxide (monomeric) The European Standard EN 935:2001 has the status of a British Standard ICS 71.100.80 NO COPYING WITHO
2、UT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 935:2001 This British Standard, having been prepared under the direction of the Materials and Chemicals Sector Policy and Strategy C
3、ommittee, was published under the authority of the Standards Policy and Strategy Committee on 2 July 2002 BSI 2 July 2002 ISBN 0 580 40011 5 National foreword This British Standard is the official English language version of EN 935:2001. The UK participation in its preparation was entrusted to Techn
4、ical 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 qual
5、ity 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 o
6、f 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 che
7、micals 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 Purpos
8、es 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 se
9、ction 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 thei
10、r 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 interes
11、ts 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 d
12、ocument was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 935 October 2001 ICS 71.100.80 English version Chemicals
13、used for treatment of water intended for human consumption - Aluminium iron(III) chloride (monomeric) and aluminium iron(III) chloride hydroxide (monomeric) Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Chlorure et hydroxychlorure daluminium et de fer(III) (
14、monomres) Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Aluminium-Eisen(III) Chlorid (Monomer) und Aluminium-Eisen(III) Hydroxydchlorid (Monomer) This European Standard was approved by CEN on 29 September 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regul
15、ations 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 Euro
16、pean 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 nation
17、al 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 COMIT EUROPEN DE NORMALISATION EUROPISCHES KOM
18、ITEE FR 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 935:2001 E Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:03 GMT+00:00 2006, Uncontrolled Copy
19、, (c) BSI EN 935:2001 (E) 2 Contents page Foreword.3 Introduction .4 1Scope.5 2Normative references.5 3Description.5 3.1Identification.5 3.2Commercial form6 3.3Physical properties.6 3.4Chemical properties.7 4Purity criteria7 4.1General 7 4.2Composition of commercial product.8 4.3Impurities and main
20、by-products8 4.4Toxic substances .8 5Test methods .8 5.1Sampling8 5.2Analyses.9 6Labelling - Transportation - Storage 9 6.1Means of delivery.9 6.2Risk and safety labelling according to the EU Directives .10 6.3Transportation regulations and labelling10 6.4Marking 11 6.5Storage.11 Annex A (informativ
21、e) General information on aluminium iron(III) chloride (monomeric) and aluminium iron(III) chloride hydroxide (monomeric)12 A.1Origin12 A.2Use.12 Annex B (normative) General rules relating to safety14 B.1Rules for safe handling and use 14 B.2Emergency procedures14 Bibliography 15 Licensed Copy: shef
22、fieldun sheffieldun, na, Tue Nov 07 03:28:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 935:2001 (E) 3 Foreword This European Standard 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
23、 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/EEC (see 1) of 15 July 1980, however it will be
24、 revised in future in order to take account of the new EU Directive 98/83/EEC (see 3). 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: Austr
25、ia, 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 03:28:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN
26、 935:2001 (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 : a) this standard provides no information as to whether the product may be used without restriction in any of the Member States
27、 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. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:03 GMT+00:00 2006, U
28、ncontrolled Copy, (c) BSI EN 935:2001 (E) 5 1 Scope This European Standard is applicable to aluminium iron(III) chloride (monomeric) and aluminium iron(III) chloride hydroxide (monomeric) used for treatment of water intended for human consumption. It describes the characteristics and specifies the r
29、equirements for aluminium iron(III) chloride (monomeric) and aluminium iron(III) chloride hydroxide (monomeric) and refers to the corresponding test methods. It also gives information on their use in water treatment. 2 Normative references This European Standard incorporates by dated or undated refe
30、rence, provisions from other publications. These normative references are cited at the appropriate places 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 incorpo
31、rated 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 p
32、roducts 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(III) chloride (monomeric); b) Aluminium iron(III) chloride hydroxide (monomeric). 3.1.2 Synonym or common names
33、For Aluminium iron(III) chloride hydroxide (monomeric): bauxite or clay hydroxide chloride. 3.1.3 Relative molecular mass Variable (see 3.1.4). 3.1.4 Empirical formula AlxFe1-x(OH)aClb with (a + b) = 3 and x = 0,67 to 0,99 for aluminium iron chlorides x = 0,80 to 0,99 for aluminium iron chloride hyd
34、roxides a = 0 to 1,05 b = 3 to 1,95 a = 0 for aluminium iron(III) chloride (monomeric) products, and these products normally have a detectable free acidity (see 5.2) Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 935:2001 (E) 6 3.1.5 Che
35、mical formula Variable (see 3.1.4). 3.1.6 CAS Registry Number 1) The following is a list of CAS Registry Numbers for products or their components. AlCl3 : 7446-70-0. FeCl3 : 7705-08-0. Al(OH)aClb : 1327-41-9 with (a + b) = 3 and a less than 1,05. Al(OH)Cl2 : 14215-15-7. 3.1.7 EINECS reference 2) The
36、 following is a list of EINECS reference numbers for products or their components. AlCl3 : 231-208-1. FeCl3 : 231-729-4. Al(OH)aClb : 215-477-2. Al(OH)Cl2 : 238-071-7. 3.2 Commercial form The products are available as liquids. 3.3 Physical properties 3.3.1 Appearance The products are a yellow to bro
37、wn liquids. 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 value : 1,3 g/ml for Al 5,3 % (m/m). 3.3.3 Solubility in water Aluminium iron(III) chloride (monomeric) and aluminium iron
38、(III) chloride hydroxide (monomeric) are fully miscible with water. NOTEDepending on the particular product, dilute solutions can hydrolyze and form a precipitate. 1) Chemical Abstracts Service Registry Number. 2) European inventory of Existing Commercial chemical Substances. Licensed Copy: sheffiel
39、dun sheffieldun, na, Tue Nov 07 03:28:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 935:2001 (E) 7 3.3.4 Vapour pressure at 20 C Not known. 3.3.5 Boiling point at 100 kPa 3) Not known. 3.3.6 Crystallization point Typical value is - 20 C for Al 5,3 % (m/m). 3.3.7 Specific heat Not known. 3.3.8 Vis
40、cosity (dynamic) Typical value is 20 mPas 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 hardeness Not applicable. 3.4 Chemical properties Aluminium iron(III) chloride (monomeric) and aluminium iron(III) chloride hydrox
41、ide (monomeric) are acidic liquids which hydrolyze and form a precipitate of aluminium hydroxide and iron hydroxide when diluted beyond a particular concentration. NOTEThe solubility of aluminium and the solubility of iron depend on the pH value and the product should be used within an appropriate p
42、H 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 processes and raw materials. If a change in the production process or raw materials leads to significant quanti
43、ties of other impurities or by-products being present, this shall be notified to the user. 3) 100 kPa = 1 bar. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 935:2001 (E) 8 4.2 Composition of commercial product The concentration of activ
44、e matter expressed as grams of aluminium per kilogram of product (Al g/kg) shall be greater than 40 g/kg. The contents of aluminium and iron shall be within 3 % of the manufacturers declared values. The ratio Fe/Al (m/m) shall be less than 0,50 for aluminium iron(III) chloride hydroxides (monomeric)
45、 and less than 1,0 for aluminium iron(III) chlorides (monomeric). The relative basicity, expressed as the mole ratio OH/3(Al+Fe), shall be within the range 0 to 0,35 for aluminium iron(III) chloride hydroxides (monomeric). For aluminium iron(III) chloride (monomeric), the basicity is zero. Aluminium
46、 iron(III) chloride (monomeric) often have a free acidity. 4.3 Impurities and main by-products The content of insoluble matter shall be lower than 25 g/kg (Al + Fe). 4.4 Toxic substances The content of toxic substances shall conform to the requirements specified in Table 1. Table 1 Toxic substances
47、Limit mg/kg (Al + Fe) 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 t
48、he 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 bottle
49、s 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 5.1.1.1.3. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:28:03 GMT+00:00 20