1、BS EN 12672:2008ICS 13.060.20; 71.100.80NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDChemicals used for treatment of water intended for human consumption Potassium permanganateCopyright European Committee for Standardization Provided by IHS under license with
2、 CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-This British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 May 2009 BSI 2009ISBN 978 0 580 58049 9Amendments/corrigenda issued since publicationDate CommentsBS EN 1267
3、2:2008National forewordThis British Standard is the UK implementation of EN 12672:2008. Itsupersedes BS EN 12672:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee CII/59, Chemicals for drinking water treatment.A list of organizations represented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 t
4、his committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.Copyright European Commit
5、tee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12672:2008EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 12672July 2008ICS 71.100.80 Supersedes EN 12672:2000 English VersionChemicals used for tr
6、eatment of water intended for humanconsumption - Potassium permanganateProduits chimiques utiliss pour le traitement de leaudestine la consommation humaine - Parmanganate depotassiumProdukte zur Aufbereitung von Wasser fr denmenschlichen Gebrauch - KaliumpermanganatThis European Standard was approve
7、d by CEN on 28 June 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandar
8、ds may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to th
9、e CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherla
10、nds, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any
11、 form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12672:2008: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12672:2008EN 12672:2008 (E) 2 Con
12、tents Page Foreword 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Description 5 4 Purity criteria 8 5 Test methods 9 6 Labelling - Transportation - Storage 14 Annex A (informative) General information on potassium permanganate 16 Annex B (normative) General rules relating to safety 18 Biblio
13、graphy 20 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12672:2008EN 12672:2008 (E) 3 Foreword This document (EN 12672:2008) has been prepared by Technical Committee CEN/
14、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 January 2009, and conflicting national standards shall be withdrawn at the latest
15、by January 2009. Attention is drawn to the possibility that some of 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 12672:2000. Significant technical differe
16、nce between this edition and EN 12672:2000 is as follows: Deletion of reference to EU Directive 80/778/EEC of July 15, 1980 in order to take into account the latest Directive in force (see 1). According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following co
17、untries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, S
18、pain, Sweden, Switzerland and the United Kingdom. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12672:2008EN 12672:2008 (E) 4 Introduction In respect of potential adverse
19、 effects on the quality of water intended for human consumption, caused by the product covered by this European Standard: a) this European 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; b) it should be noted t
20、hat, 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 European Standard does not confer or imply acceptance or approval of the product in any of the Memb
21、er 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. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without lice
22、nse from IHS-,-,-BS EN 12672:2008EN 12672:2008 (E) 5 1 Scope This European Standard is applicable to potassium permanganate used for treatment of water intended for human consumption. It describes the characteristics of potassium permanganate and specifies the requirements and the corresponding test
23、 methods for potassium permanganate. It gives information on its use in water treatment. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition
24、of the referenced document (including any amendments) applies. EN 1233, Water quality - Determination of chromium - Atomic absorption spectrometric methods EN 1483, Water quality - Determination of mercury Method using atomic absorption spectrometry EN ISO 3696, Water for analytical laboratory use -
25、 Specification and test methods (ISO 3696:1987) EN ISO 11885, Water quality - Determination of 33 elements by inductively coupled plasma atomic emission spectroscopy (ISO 11885:1996) EN ISO 11969, Water quality - Determination of arsenic Atomic absorption spectrometric method (hydride technique) (IS
26、O 11969:1996) ISO 3165, Sampling of chemical products for industrial use - Safety in sampling ISO 3856-2, Paints and varnishes - Determination of “soluble“ metal content - Part 2: Determination of antimony content - Flame atomic absorption spectrometric method and Rhodamine B spectrophotometric meth
27、od ISO 6206, Chemical products for industrial use - Sampling Vocabulary ISO 8213, Chemical products for industrial use - Sampling techniques - Solid chemical products in the form of particles varying from powders to coarse lumps ISO 8288:1986, Water quality - Determination of cobalt, nickel, copper,
28、 zinc, cadmium and lead - Flame atomic absorption spectrometric methods ISO 9965, Water quality - Determination of selenium - Atomic absorption spectrometric method (hydride technique) 3 Description 3.1 Identification 3.1.1 Chemical name Potassium permanganate. 3.1.2 Synonym or common name Permangan
29、ate of potash. 3.1.3 Relative molecular mass 158,04 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12672:2008EN 12672:2008 (E) 6 3.1.4 Empirical formula KMnO43.1.5 Chemica
30、l formula KMnO43.1.6 CAS Registry Number 1)7722-64-7 3.1.7 EINECS reference 2)231-760-3 3.2 Commercial forms Solid product, consisting of rhombic crystals. For water treatment the commercial forms normally used are: technical grade to be dosed in liquid form, dissolved in water; free-flowing grade t
31、o be dosed either in solid form or dissolved in water. 3.3 Physical properties 3.3.1 Appearance Crystals of a dark purple or bronze-like colour; almost opaque by transmitted light and of a blue metallic lustre by reflected light. The free-flowing grade can present a different colour, usually greyish
32、. 3.3.2 Density The density of the product is 2,70 g/cm3at 20 C. The bulk density is between 1,45 g/cm3and 1,60 g/cm3. 1)Chemicals Abstracts Service Registry Number. 2)European Inventory of Existing Commercial Chemical Substances. Copyright European Committee for Standardization Provided by IHS unde
33、r license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12672:2008EN 12672:2008 (E) 7 3.3.3 Solubility (in water) The product is soluble in water. The solubility in water is given in Table 1. Aqueous solubility: KMnO4(g/l )= 30.55 + 0.796 (T, C) + 0
34、.0392 (T, C)2 where T is the Solution Temperature (C). Table 1 Solubility in water Temperature C KMnO4g/l 5 35,51 10 42,43 15 51,31 20 62,15 25 74,95 30 89,71 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3)Not applicable. 3.3.6 Melting point Product decomposes at 240 C with em
35、ission of oxygen. 3.3.7 Specific heat 744,2 kJ/kg.K at 20 C. 3.3.8 Viscosity (dynamic) Not applicable. 3.3.9 Critical temperature Not applicable. 3)100 kPa = 1 bar Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permi
36、tted without license from IHS-,-,-BS EN 12672:2008EN 12672:2008 (E) 8 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties Potassium permanganate is a very strong oxidizing agent. It is soluble in water and dissolves also in various organic solven
37、ts (e.g. methanol, ethanol). It decomposes at high temperature and also in the presence of concentrated acids, hydrogen peroxide and organic compounds in general. It hydrolyzes in contact with air, reducing to manganese dioxide (MnO2), a solid, brown to black colour product. 4 Purity criteria 4.1 Ge
38、neral This European Standard specifies the minimum purity requirements for Potassium permanganate 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 impurit
39、ies 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 clarify whether it is of appropriate purity for treatment of water intended for human consumption, taking into ac
40、count raw water quality, required dosage, contents of other impurities and additives used in the product not stated in the product standard. Limits have been given for impurities and chemicals parameters where these are likely to be present in significant quantities from the current production proce
41、ss 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. 4.2 Composition of commercial product The potassium permanganate content shall not be less than a mass fraction
42、of 98,5 % in the technical grade, and a mass fraction of 97,5 % in the free-flowing grade. 4.3 Impurities and main by-products MnO2(water insolubles): less than a mass fraction of 1,00 %. Moisture (H2O): less than a mass fraction of 0,50 %. 4.4 Chemical parameters NOTE For the purpose of this standa
43、rd, “chemical parameters“ are those defined in the EU Directive 98/83/EC of 3 November 1998 (see 1). The content of chemical parameters shall conform to the requirements specified in Table 2. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo repr
44、oduction or networking permitted without license from IHS-,-,-BS EN 12672:2008EN 12672:2008 (E) 9 Table 2 Chemical parameters Parameter Limit mg/kg of product Arsenic (As) max. 20 Cadmium (Cd) max. 50 Chromium (Cr) max. 50 Mercury (Hg) max. 10 Nickel (Ni) max. 50 Lead (Pb) max. 50 Antimony (Sb) max.
45、 50 Selenium (Se) max. 50 NOTE Cyanide, which does not exist in a strong oxidizing medium such as potassium permanganate, is not a relevant chemical parameter. Pesticides and polycyclic aromatic hydrocarbons are not by-products of the manufacturing process. 4.5 Flowability of freeflowing grade The f
46、ree-flowing grade shall pass the flowability test. 5 Test methods 5.1 Sampling Observe the general recommendations of ISO 3165 and take account of ISO 6206. Prepare the laboratory sample(s) required by the relevant procedure described in ISO 8213. 5.2 Analysis 5.2.1 Determination of potassium perman
47、ganate (main product) 5.2.1.1 Principle Reduction of potassium permanganate Mn(VII) to Mn(II) with sodium oxalate under acidic conditions. The excess of sodium oxalate is titrated with a standard volumetric solution of potassium permanganate. 5.2.1.2 Reagents All reagents shall be of a recognized an
48、alytical grade and the water used shall conform to grade 3 in accordance with EN ISO 3696. 5.2.1.2.1 Potassium permanganate. 5.2.1.2.2 Sodium oxalate. 5.2.1.2.3 Sulfuric acid solution, 20 % (m/m). 5.2.1.2.4 Potassium permanganate standard volumetric solution c(KMnO4) = 1,000 g/l. Weigh 1,000 g of the potassium permanganate (5.2.1.2.1), transfer to a 1 l volumetric flask and dilute to volume with water. Allow to stand with occasional mixing for 15 min. Copyright European Committee for Standardization Provided by IHS under license with CENNot for Resal
