1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 15076:2013Chemicals used for treatmentof swimming pool water Sodium hydroxideBS EN 15076:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementatio
2、n of EN 15076:2013. Itsupersedes BS EN 15076:2006 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee CII/59, Chemicals for drinking water treatment.A list of organizations represented on this committee can beobtained on request to its secretary.This public
3、ation does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 80014 6ICS 13.060.25; 71.100.80Compliance with a British Standard cannot confer
4、immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2013.Amendments issued since publicationDate Text affectedBS EN 15076:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15076 May 2013 ICS 71.100.80
5、Supersedes EN 15076:2006English Version Chemicals used for treatment of swimming pool water - Sodium hydroxide Produits chimiques utiliss pour le traitement de leau des piscines - Hydroxyde de sodium Produkte zur Aufbereitung von Schwimm- und Badebeckenwasser - Natriumhydroxid This European Standard
6、 was approved by CEN on 21 March 2013. 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
7、national standards may be obtained on application to the CEN-CENELEC 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 l
8、anguage and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Gre
9、ece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG
10、 Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15076:2013: EBS EN 15076:2013EN 15076:2013 (E) 2 Contents Page Foreword . 3 Introduction 4 1 Scope 5 2 Normative references
11、. 5 3 Description . 5 3.1 Identification . 5 3.2 Commercial forms 6 3.3 Physical properties 6 3.4 Chemical properties . 8 4 Purity criteria 8 4.1 General . 8 4.2 Composition of commercial product . 8 4.3 Impurities and main by-products 9 4.4 Chemical parameters . 9 5 Test methods 9 6 Labelling Trans
12、portation Storage 10 6.1 Means of delivery . 10 6.2 Labelling according to EU legislation . 10 6.3 Transportation regulations and labelling 11 6.4 Marking . 11 6.5 Storage . 11 Annex A (informative) General information on sodium hydroxide . 12 A.1 Origin 12 A.2 Use 12 Annex B (normative) General rul
13、es relating to safety . 13 B.1 Rules for safe handling and use 13 B.2 Emergency procedures 13 Bibliography 14 BS EN 15076:2013EN 15076:2013 (E) 3 Foreword This document (EN 15076:2013) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This
14、 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 November 2013, and conflicting national standards shall be withdrawn at the latest by November 2013. Attention is drawn to the possibility that some of
15、the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 15076:2006. Significant technical differences between this edition and EN 15076:2006 are as follows: Replacem
16、ent of warning and safety precautions notes by labelling according to Regulation (EC) No 1272/2008 3. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
17、 Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the U
18、nited Kingdom. BS EN 15076:2013EN 15076:2013 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for swimming pools caused by the product covered by this European Standard: a) this European Standard provides no information as to whether the product may be used
19、 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 1 Conformity with this Europe
20、an 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 European Standard is subject to regulation or control by National Authorities. NOTE 2 This product is a biocide and needs to comply with th
21、e relevant legislation in force. In the European Union, at the time of publication, this legislation is Directive 1998/8/EC 1. BS EN 15076:2013EN 15076:2013 (E) 5 1 Scope This European Standard is applicable to sodium hydroxide solution used directly or for the production of formulations for treatin
22、g swimming pool water. It describes the characteristics and specifies the requirements and the corresponding test methods for sodium hydroxide. It gives information on its use for treating swimming pool water and determines the rules relating to safe handling and use (see Annex B). 2 Normative refer
23、ences The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. E
24、N 896, Chemicals used for treatment of water intended for human consumption Sodium hydroxide 3 Description 3.1 Identification 3.1.1 Chemical name Sodium hydroxide. 3.1.2 Synonym or common name Caustic soda. 3.1.3 Relative molecular mass 40,0. 3.1.4 Empirical formula NaOH. 3.1.5 Chemical formula NaOH
25、. 3.1.6 CAS Registry Number 1)1310-73-2. 3.1.7 EINECS reference 2)215-185-5. 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. BS EN 15076:2013EN 15076:2013 (E) 6 3.2 Commercial forms The product is available as flakes, pearls, solid, or
26、 as an aqueous solution of different concentrations. 3.3 Physical properties 3.3.1 Appearance Solid: the product is white, deliquescent. Liquid: the product is a clear solution, slightly turbid colourless solution, slightly viscous. 3.3.2 Density Solid: the density of this product is 2,1 g/cm3. The
27、bulk density of pearls is 1,2 kg/dm3.Liquid: the density of solution is 1,52 g/ml for a product concentration of mass fraction of 50 % at 20 C. 3.3.3 Solubility in water The product is highly soluble at all temperatures above 20 C (partial crystallisation occurs above concentration of mass fraction
28、of 55 % (see Figure 1). BS EN 15076:2013EN 15076:2013 (E) 7 Key 1 temperature in C. 2 NaOH concentration in mass fraction in % Figure 1 Solubility of sodium hydroxide 3.3.4 Vapour pressure Solution of concentration of mass fraction of 50 %: 120 Pa at 20 C; 450 Pa at 40 C; 5 000 Pa at 80 C. 3.3.5 Boi
29、ling point at 100 kPa 3)145 C for a solution of concentration of mass fraction of 50 %. 3.3.6 Crystallisation point + 12 C for a solution of concentration of mass fraction of 50 % (see Figure 1). 3) 100 kPa = 1 bar. BS EN 15076:2013EN 15076:2013 (E) 8 3.3.7 Specific heat 3 220 J/(kg K) at 20 C for a
30、 solution of concentration of mass fraction of 50 %. 3.3.8 Viscosity (dynamic) For a solution of concentration of mass fraction of 50 %: 100 Pa.s at 20 C; 25 Pa.s at 40 C; 5 Pa.s at 80 C. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not
31、 applicable. 3.4 Chemical properties The solutions of sodium hydroxide are strongly alkaline. Dilution of sodium hydroxide is very exothermic. 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for sodium hydroxide used for the treatment of water for swimm
32、ing pools. 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. Users of this product should check the n
33、ational regulations in order to clarify whether it is of appropriate purity for treatment of water for swimming pools, 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 f
34、or 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 n
35、otified to the user. 4.2 Composition of commercial product The product shall contain not less than a mass fraction of 96 % of NaOHfor the solid form. Typical concentration for solutions of sodium hydroxide is either a mass fraction of 50 % or 30 %, and shall be in any case within the manufacturers s
36、tated tolerance. BS EN 15076:2013EN 15076:2013 (E) 9 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 1. The concentration limits refer to pure NaOH mass fraction of 100 %. Table 1 Impurities Impurity Limit in mass fraction in % of NaOH Sodium chlo
37、ride (NaCl)amax. 2,4 Sodium carbonate (Na2CO3)bmax. 0,4 Sodium chlorate (NaClO3)cmax. 0,7 aToo high concentrations can cause problems with some ion exchange resins. bSodium carbonate is formed in contact with atmospheric carbon dioxide. cThe presence of any oxidising agent in sodium hydroxide is to
38、be avoided. 4.4 Chemical parameters The product shall conform to the requirements specified in Table 2. Table 2 Chemical parameters Parameter Limit in mg/kg of NaOH Type 1 Type 2 Arsenic (As) max. 2 10 Cadmium (Cd) max. 1 5 Chromium (Cr) max. 1 10 Mercury (Hg) max. 0,1 1 Nickel (Ni) max. 2 10 Lead (
39、Pb) max. 5 20 Antimony (Sb) max. 5 5 Selenium (Se) max. 5 5 NOTE Cyanides, pesticides and polycyclic aromatic hydrocarbons are not relevant in sodium hydroxide. For parametric values of sodium hydroxide on trace metal content in drinking water, see 2. 5 Test methods The sampling and the analytical m
40、ethods shall be those described in EN 896. BS EN 15076:2013EN 15076:2013 (E) 10 6 Labelling Transportation Storage 6.1 Means of delivery Sodium hydroxide may be delivered in containers, drums, cans or bottles. To ensure the purity of the product, the means of delivery shall not have been previously
41、used for any different product or it shall have been specially cleaned and prepared before use. 6.2 Labelling according to EU legislation4)The following labelling requirements shall apply to sodium hydroxide at the date of publication of this European Standard. Signal word: Danger Classification and
42、 hazard statement: H 314 Causes severe skin burns and eye damage Figure 2 GHS 05 The regulation 3 contains a list of substances classified by the EU. Substances not listed in this regulation should be classified on the basis of their intrinsic properties according to the criteria in the regulation b
43、y the person responsible for the marketing of the substance. 4) See 3. BS EN 15076:2013EN 15076:2013 (E) 11 6.3 Transportation regulations and labelling Sodium hydroxide solution is listed as UN Number 5): 1824. The labelling requirements are the following at the date of publication of this European
44、 Standard: RID 6)/ADR 7) : class 8, classification code C5, packing group II. IMDG 8): class 8, packing group II. IATA9): class 8, packing group II. 6.4 Marking The marking shall include the following information: name “sodium hydroxide“, trade name and type; net mass; name and the address of the su
45、pplier and/or manufacturer; statement “this product conforms to EN 15076“. 6.5 Storage 6.5.1 Material Avoid contact with aluminium, zinc or galvanised steel material. Mild steel, polyester or polypropylene are suitable materials. To avoid any iron contamination in the product, a suitable lining of t
46、he steel tank may be used. 6.5.2 Long term stability Absorption of carbon dioxide from the ambient air leads to formation of sodium carbonate. 6.5.3 Storage incompatibilities Avoid contact with some metals such as zinc, aluminium, copper, tin or their alloys, which produce hydrogen. A violent reacti
47、on is to be expected when sodium hydroxide comes in contact with concentrated acids and organic chemicals, particularly chlorinated hydrocarbons. 5) United Nations Number. 6) Regulations concerning International carriage of Dangerous goods by rail. 7) European Agreement concerning the international
48、carriage of Dangerous goods by Road. 8) International Maritime transport of Dangerous Goods. 9) International Air Transport Association. BS EN 15076:2013EN 15076:2013 (E) 12 Annex A (informative) General information on sodium hydroxide A.1 Origin A.1.1 Raw materials Sodium chloride solution. For an
49、alternative production route: sodium carbonate and calcium hydroxide. A.1.2 Manufacturing process Electrolysis of sodium chloride solution (brine) in a mercury cell, a membrane cell or a diaphragm cell. Sodium hydroxide can also be produced by caustification of sodium carbonate with calcium hydroxide. A.2 Use A.2.1 Function Sodium hydroxide is mainly used as a neutralising agent, for adjusting the pH value, as a softening agent and for alkalinity adjustment. A.2.2 Form in which it is used For safety reason
