SIST EN 12672:2009
(Main)Chemicals used for treatment of water intended for human consumption - Potassium permanganate
Chemicals used for treatment of water intended for human consumption - Potassium permanganate
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 methods for potassium permanganate. It gives information on its use in water treatment.
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Kaliumpermanganat
Diese Europäische Norm gilt für Kaliumpermanganat zur Aufbereitung von Wasser für den menschlichen
Gebrauch. Sie beschreibt die Eigenschaften von Kaliumpermanganat und legt die Anforderungen sowie die
entsprechenden Prüfverfahren für Kaliumpermanganat fest. Sie enthält Angaben zu dessen Anwendung in
der Wasseraufbereitung.
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Parmanganate de potassium
La présente Norme européenne s’applique au permanganate de potassium utilisé pour le traitement de l’eau destinée à la consommation humaine. Elle décrit les caractéristiques du permanganate de potassium et spécifie les exigences et les méthodes d’essai correspondantes. Elle donne des informations pour son emploi dans le traitement de l’eau.
Kemikalije, ki se uporabljajo za pripravo pitne vode - Kalijev permanganat
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo pitne vode - Kalijev permanganatProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - KaliumpermanganatProduits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Parmanganate de potassiumChemicals used for treatment of water intended for human consumption - Potassium permanganate71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12672:2008SIST EN 12672:2009en,fr,de01-januar-2009SIST EN 12672:2009SLOVENSKI
STANDARDSIST EN 12672:20011DGRPHãþD
SIST EN 12672:2009
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12672July 2008ICS 71.100.80Supersedes EN 12672:2000
English VersionChemicals used for treatment of water intended for humanconsumption - Potassium permanganateProduits chimiques utilisés pour le traitement de l'eaudestinée à la consommation humaine - Parmanganate depotassiumProdukte zur Aufbereitung von Wasser für denmenschlichen Gebrauch - KaliumpermanganatThis European Standard was approved 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 nationalstandards 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 the 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, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12672:2008: ESIST EN 12672:2009
EN 12672:2008 (E) 2 Contents
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 Bibliography 20
SIST EN 12672:2009
EN 12672:2008 (E) 3 Foreword This document (EN 12672:2008) 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 January 2009, and conflicting national standards shall be withdrawn at the latest 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 difference 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 countries 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, Spain, Sweden, Switzerland and the United Kingdom.
SIST EN 12672:2009
EN 12672:2008 (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 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 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 European 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.
SIST EN 12672:2009
EN 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 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 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 - 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) (ISO 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 method 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, 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 Permanganate of potash. 3.1.3 Relative molecular mass 158,04 SIST EN 12672:2009
EN 12672:2008 (E) 6 3.1.4 Empirical formula KMnO4 3.1.5 Chemical formula KMnO4 3.1.6 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 to 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. 3.3.2 Density The density of the product is 2,70 g/cm3 at 20 °C. The bulk density is between 1,45 g/cm3 and 1,60 g/cm3.
1) Chemicals Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. SIST EN 12672:2009
EN 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) + 0.0392 (T, °C)2 where
T
is the Solution Temperature (°C). Table 1 — Solubility in water Temperature °C KMnO4 g/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 emission 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 SIST EN 12672:2009
EN 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 solvents (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 General 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 impurities 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 account 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 process 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 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 standard, "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. SIST EN 12672:2009
EN 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. 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 free–flowing grade The free-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 permanganate (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 analytical 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. SIST EN 12672:2009
EN 12672:2008 (E) 10 Standardize the solution as follows: Weigh 2,120 g of the sodium oxalate (5.2.1.2.2) and transfer to a 1 l volumetric flask. Add 20 ml of 20 % (m/m) H2SO4 (5.2.1.2.3) to the 1 l volumetric flask containing the oxalate, dissolve and allow to stand for 5 min. Transfer 40 ml of the sodium oxalate solution by pipette into a small conical flask, heat to 70 °C to 80 °C and titrate with the potassium permanganate standard volumetric solution to a faint pink end-point that persists for 20 s to
30 s. The standardization factor (F) is calculated as follows: VF40=
(1) where V is the volume, in millilitres, of potassium permanganate standard volumetric solution used in titration. 5.2.1.3 Apparatus 5.2.1.3.1 Ordinary laboratory appara
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