SIST EN 12678:2008
(Main)Chemicals used for treatment of water intended for human consumption - Potassium peroxomonosulfate
Chemicals used for treatment of water intended for human consumption - Potassium peroxomonosulfate
This European Standard is applicable to potassium peroxomonosulfate used for treatment of water intended for human consumption. It describes the characteristics of potassium peroxomonosulfate and specifies the requirements and the corresponding test methods for potassium peroxomonosulfate. It gives information on its use in water treatment.
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Kaliumperoxomonosulfat
Diese Europäische Norm gilt für Kaliumperoxomonosulfat zur Aufbereitung von Wasser für den menschlichen
Gebrauch. Sie beschreibt die Eigenschaften von Kaliumperoxomonosulfat und legt die Anforderungen sowie
die entsprechenden Prüfverfahren für Kaliumperoxomonosulfat fest. Sie gibt Informationen für seine
Anwendung in der Wasseraufbereitung.
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Peroxomonosulfate de potassium
La présente Norme européenne s’applique au peroxomonosulfate de potassium utilisé pour le traitement de l’eau destinée à la consommation humaine. Elle décrit les caractéristiques du peroxomonosulfate 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 peroksomonosulfat
General Information
Relations
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 peroksomonosulfatProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - KaliumperoxomonosulfatProduits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Peroxomonosulfate de potassiumChemicals used for treatment of water intended for human consumption - Potassium peroxomonosulfate71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12678:2008SIST EN 12678:2008en,fr,de01-november-2008SIST EN 12678:2008SLOVENSKI
STANDARDSIST EN 12678:20011DGRPHãþD
SIST EN 12678:2008
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12678July 2008ICS 71.100.80Supersedes EN 12678:2000
English VersionChemicals used for treatment of water intended for humanconsumption - Potassium peroxomonosulfateProduits chimiques utilisés pour le traitement de l'eaudestinée à la consommation humaine - Peroxomonosulfatede potassiumProdukte zur Aufbereitung von Wasser für denmenschlichen Gebrauch - KaliumperoxomonosulfatThis 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 12678:2008: ESIST EN 12678:2008
EN 12678:2008 (E) 2 Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Description.5 4 Purity criteria.7 5 Test methods.8 6 Labelling - Transportation - Storage.14 Annex A (informative)
General information on potassium peroxomonosulfate.16 Annex B (normative)
General rules relating to safety.18 Annex C (normative)
Determination of arsenic, antimony and selenium (atomic absorption spectrometry hydride technique).19 Bibliography.25
SIST EN 12678:2008
EN 12678:2008 (E) 3 Foreword This document (EN 12678:2008) 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 12678:2000. Significant technical difference between this edition and EN 12678:2000 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 12678:2008
EN 12678:2008 (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 12678:2008
EN 12678:2008 (E) 5 1 Scope This European Standard is applicable to potassium peroxomonosulfate used for treatment of water intended for human consumption. It describes the characteristics of potassium peroxomonosulfate and specifies the requirements and the corresponding test methods for potassium peroxomonosulfate. 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) ISO 3165, Sampling of chemical products for industrial use - Safety in sampling 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 3 Description 3.1 Identification 3.1.1 Chemical name Potassium peroxomonosulfate triple salt. 3.1.2 Synonym or common name Potassium peroxomonosulfate, Potassium monopersulfate, Potassium hydrogenperoxomonosulfate, Pentapotassium-bis(peroxomonosulfate)bis(sulfate). 3.1.3 Relative molecular mass Triple salt: 614,76. (Active ingredient KHSO5: 152,17) 3.1.4 Empirical formula of triple salt K5H3S4O18 (2 KHSO5. KHSO4. K2SO4) Active ingredient KHSO5. SIST EN 12678:2008
EN 12678:2008 (E) 6 3.1.5 CAS Registry Number1) 70693-62-8 3.1.6 EINECS reference2) 274-778-7 3.2 Commercial form Potassium peroxomonosulfate as commercial product exists as a triple salt comprising potassium peroxomonosulfate (2KHSO5) potassium hydrogen sulfate (KHSO4) and potassium sulfate (K2SO4). 3.3 Physical properties of triple salt 3.3.1 Appearance and odour The product is white, odourless, granular, free-flowing salt. 3.3.2 Density The bulk density of the product is approximately between 1 g/cm3 and 1,2 g/cm3. 3.3.3 Solubility in water The solubility of the product is: approximately 250 g/l at 20 °C; approximately 300 g/l at 50 °C; approximately 330 g/l at 70 °C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3) Not applicable. 3.3.6 Melting point The product decomposes above 60 °C. 3.3.7 Specific heat Not applicable.
1) Chemical Abtracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. 3) 100 kPa = 1 bar SIST EN 12678:2008
EN 12678:2008 (E) 7 3.3.8 Viscosity (dynamic) Not applicable. 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 Potassium peroxomonosulfate is a powerful oxidizing agent. Aqueous solutions of the product exhibit a strongly acid reaction; a mass fraction solution of 3 % has a pH value of 2 at 20 °C. The standard reduction potential E0 of potassium peroxomonosulfate for the reaction: HSO5- + 2H+ + 2e-
'
HSO4- + H2O
(1) is:
+ 1,82 V at 25°C 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for Potassium peroxomonosulfate 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 the 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 commercial product shall contain KHSO5 (potassium peroxomonosulfate) at a mass fraction greater than 45 per cent or the manufacturer’s declared values. NOTE Typical composition in mass fraction should be approximately 45 % KHSO5, potassium hydrogen sulfate (KHSO4), 25 % and potassium sulfate (K2SO4) 30 % . SIST EN 12678:2008
EN 12678:2008 (E) 8 4.3 Impurities and main by-products See 4.1. 4.4 Chemical parameters NOTE For the purpose of this European 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 1. Table 1 - Chemical parameters Parameter Limit (mg/kg) of KHSO5
Type 1 Type 2 Arsenic (As) max. 2 10 Cadmium (Cd) max. 1 10 Chromium (Cr) max. 0,4 10 Mercury (Hg) max. 4 8 Nickel (Ni) max. 1 10 Lead (Pb) max. 2 10 Antimony (Sb) max. 10 10 Selenium (Se) max. 10 10 NOTE Cyanide is usually not relevant in a strong oxidizing medium. Pesticides and polycyclic aromatic hydrocarbons are not by-products of the manufacturing process. 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 peroxomonosulfate (KHSO5) (active ingredient) 5.2.1.1 Principle Iodometric titration with sodium thiosulfate standard volumetric solution in sulfuric acid medium. The method depends on the oxidizing action of the peroxomonosulfate ion (HSO5)- on iodide ions, Equation (2) and the subsequent determination of iodine formed, through the reducing agent sodium thiosulfate, Equation (3). The inflection point of the potentiometric titration is located around 250 mV (reference to Ag/AgCl-Electrode). HSO5- + 3 Kl + H2SO4 → HSO4- + Kl3 + K2SO4 + H2O (2) Kl3 + 2 Na2S2O3 → Kl + 2 Nal + Na2S4O6 (3) SIST EN 12678:2008
EN 12678:2008 (E) 9 5.2.1.2 Reagents All reagents shall be of a recognised analytical grade and the water used shall conform to grade 3 in accordance with EN ISO 3696. 5.2.1.2.1 Sulfuric acid solution, mass fraction 25 %
Place 750 ml of water in a heat resistant beaker (volume 2 000 ml). Measure 135 ml of sulfuric acid, mass fraction 98 % , and dilute in the water by small additions and under gentle stirring. Cover the beaker with a watch glass and keep it for several hours in a safe place to cool. SAFETY PRECAUTIONS: During dilution the solution becomes hot; wear safety goggles, protective gloves and protective clothing. 5.2.1.2.2 Hydrochloric acid solution, mass fraction 10 %
5.2.1.2.3 Potassium iodide solution, mass fraction 30 %
Weigh, to the nearest 0,1 g, 60 g of potassium iodide, iodate-free grade, and dissolve it in 140 ml of water. Keep the solution in a dark place. 5.2.1.2.4 Starch solution, mass fraction 1 %
Weigh 1,00 g of soluble starch and make a slurry with 5 ml of water. Add 95 ml of water to the slurry and boil for several minutes to dissolve it. Cool the solution. This solution needs refrigeration to avoid decomposition of the starch which results in a vague end point. Keep the solution cool and use it within one week. NOTE Commercial starch solutions as indicators for iodine titration exist and can be used in place of the specified starch solution provided that their efficiency has been previously tested. 5.2.1.2.5 Potassium iodate (KIO3) 5.2.1.2.6 Sodium thiosulfate standard volumetric solution, c(Na2S2O3.5H2O) = 0,1 mol/l Standard volumetric solutions of sodium thiosulfate are commercially available.
Alternatively a standard volumetric solution can be prepared by the following procedure:
Dissolve 24,8 g Na2S2O3 . 5 H2O in a 1 000 ml one-mark volumetric flask in about 0,75 l water. After the temperature has equalized makeup to the mark with water and mix thoroughly.
To standardize: Weigh, to the nearest 0,1 mg, 3,600 g (m)of dry potassium iodate. Dissolve in water in a 1 000 ml one-mark volumetric flask, make up to the mark with water and mix (standard reference solution c(1/6 KIO3) = 0,1 mol/l ). Place 200 ml of water in a 500 ml stoppered conical flask, add (2 ± 0,5) g of potassium iodide and stir to dissolve. Then introduce, by means of a pipette, 10,0 ml of sodium thiosulfate solution for standardization , add (15 ± 1) ml of hydrochloric acid solution (diluted 1 + 1 by volume) and (5 ± 1) ml of starch solution (5.2.1.2.4). Titrate immediately with the potassium iodate standard reference solution until the appearance of a blue coloration persisting for at least 30 s occurs. Record the volume (V1) of iodate used.
The actual concentration, c, of the sodium thiosulfate standard volumetric solution (Na2S2O3.5H2O), expressed in moles per litre is given by the following equation :
VcV11c×=
(4)
where
c1 is the concentration, expressed in moles per litre, of the potassium iodate standard reference solution [c(1/6 KIO3) = 0,1 mol/l ];
SIST EN 12678:2008
EN 12678:2008 (E) 10 V
is the volume, in millilitres, of the sodium thiosulfate standard volumetric solution used for the standardization (V= 10 ml);
V1 is the volume, in millilitres, of potassium iodate standard reference solution used in the titration.
5.2.1.3 Apparatus Ordinary laboratory apparatus and glassware together with the following: 5.2.1.3.1 Potentiometric titrimeter. 5.2.1.3.2 Automatic burette, volume 50 ml, equipped with an injection tip (made of brown glass). 5.2.1.3.3 Electromechanical stirrer. 5.2.1.3.4 Glass titration beaker, capacity 250 ml (made of brown glass). 5.2.1.3.5 Platinum-Ag/AgCl combination electrode with electrolytic junction with built-in diaphragm. 5.2.1.4 Procedure 5.2.1.4.1 Test solution Weigh, to the nearest 0,1 mg, a test portion of approximately 0,7 g (m) into a dry, clean beaker (5.2.1.3.4). Add 20 ml of potassium iodide solution (5.2.1.2.3) and 10 ml of sulfuric acid (5.2.1.2.1). After dissolution under gentle stirring cover the beaker with a watch glass and keep the solution in the dark for 30 min. Then add 100 ml of water. 5.2.1.4.2 Determination Input the calculation data in the titration microprocessor in accordance with the instruction manual. Place the electrodes in the titration beaker and titrate with the sodium thiosulfate solution (5.2.1.2.6). Record the titration curve and determine the inflection point as the equivalent point of the potentiometric titration. 5.2.1.5 Expression of results The potassium peroxomonosulfate (KHSO5) content, C1, expressed as a percentage by mass, is given by the following equation: mV76,1
c
1××=C
(5) where
V is the volume, expressed in millilitres, of the sodium thiosulfate standard volumetric solution (5.2.1.2.6) used for the titration; c is the concentration, in moles per litre, of the sodium thiosulfate solution (5.2.1.2.6) ; m is the mass of the test portion, expressed in grams. 76,1 is the mass in grams of KHSO5 corresponding to 1 000 ml of sodium thiosulfate c(Na2S2O3.5H2O) = 0,1mol/l. SIST EN 12678:2008
EN 12678:2008 (E) 11 5.2.1.6 Repeatability limit The absolute difference between two single test results, obtained under repeatability conditions, shall not be greater than the repeatability value, r, as calculated from the following equation: r = 0,001 z
(6) where
z
is the mean of the two results, expressed in mass fraction %. NOTE Repeatibility conditions are conditions where mutually independant test results are obtained with the same method on identical test material in the same laboratory by the same operator using the same equipment within short intervals of time. 5.2.2 Chemical parameters 5.2.2.1 Determination of antimony (Sb), arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), nickel (Ni) and selenium (Se) 5.2.2.1.1 Principle The elements arsenic, antimony, cadmium, chromium, lead, nickel and selenium are determined by atomic absorption spectrometry. 5.2.2.1.2 Reagents All reagents shall be of a recognised analytical grade and the water used shall conform to the appropriate grade specified in EN ISO 3696. 5.2.2.1.2.1 Nitric acid, concentrated, density ρ = 1,42 g/ml. 5.2.2.1.2.2 Nitric acid, solution, c (HNO3) = 2,5 mol/l. 5.2.2.1.2.3 Barium nitrate, Ba (NO3)2. 5.2.2.1.3 Procedure 5.2.2.1.3.1 Test portion Weigh, to the nearest 0,01 g:
for Cd, Ni, Pb, As and Sb: 1 g (m) of the laboratory sample into a 100 ml one-mark volumetric flask; for Cr: 2 g (m) of the laboratory sample into a 100 ml one-mark volumetric flask; for Se: 0,5 g (m) of the laboratory sample into a 100 ml one-mark volumetric flask. 5.2.2.1.3.2 Test solution For Cd: dissolve the test portion with 40 ml of water and after adding 20 ml of barium nitrate (5.2.2.1.2.3), bring solution briefly to boiling point and after cooling dilute to volume with water and homogenize. The determination is made with the clear supernatant solution after the barium sulfate has settled out.
For Cr and Ni: add 0,5 ml of nitric acid (5.2.2.1.2.2) to the test portion, dilute with a few millilitres of water and mix. Dilute to volume with water and homogenize. For Pb and As: dissolve the test portion with a few millilitres of water and mix. Dilute to volume with water and homogenize. SIST EN 12678:2008
EN 12678:2008 (E) 12 For Se and Sb: add 2 ml of nitric acid (5.2.2.1.2.1) to the test portion, dilute with a few millilitres of water and mix. Dilute to volume with water and homogenize. 5.2.2.1.3.3 Determination Determine the content of chemical parameters in the test solution (5.2.2.1.3.2) in accordance with the following methods: Cd, Ni and Pb: in accordance with ISO 8288:1986, Method A; Cr: in accordance with EN 1233; As, Se and Sb: in accordance with the method given in Annex C. These methods will give an interim result (y) expressed in milligrams per litre that needs to be corrected to give the final concentration according to the equation in 5.2.2.1.4. 5.2.2.1.4 Expression of results From the interim results (y) determined (see 5.2.2.1.3.3), the content, C2, of each chemical parameter in the laboratory sample, expressed in milligrams per kilogram of potassium peroxomonosulfate is given by the following equation: 12100CmVyC××=
(7) Where y is the interim result (5.2.2.1.3.3); V is the volume, expressed in millilitres, of the test solution (5.2.2.1.3.2) (= 100 ml); m is the mass, expressed in grams, of the test portion; C1 is the potassium peroxomonosulfate content in percentage by mass of product (see 5.2.1.5). 5.2.2.2 Determination of the mercury content (Hg) 5.2.2.2.1 Principle The element mercury is determined by flameless atomic absorption spectrometry in accordance with EN 1483. 5.2.2.2.2 Reagents All reagents shall be of a recognised analytical grade and the water used shall conform to the appropriate grade specified in EN ISO 3696. 5.2.2.2.2.1 Potassium permanganate solution, c(KMnO4) = 50 g/l. 5.2.2.2.2.2 Sulfuric acid, concentrated, density ρ = 1,84 g/ml. 5.2.2.2.2.3 Hydroxylammonium chloride solution, c(NH2OH.HCl) = 100 g/l. 5.2.2.2.2.4 Potassium dichromate solution, c(K2Cr2O7) = 4 g/l in 50 % volumic fraction nitric acid solution. SIST EN 12678:2008
EN 12678:2008 (E) 13 5.2.2.2.3 Procedure 5.2.2.2.3.1 Test portion Weigh, to the nearest 0,01 g, 10 g (m2) of the laboratory sample, into a glass beaker. 5.2.2.2.3.2 Test solution Quantitatively transfer the test portion to a 100 ml (V1) volumetric flask. Dilute with water to the mark and mix (solution A). Pipette, accurately 10 ml of the solution A. Transfer to a 250 ml conical flask and add 60 ml of water, 20 ml of a potassium permanganate solution (5.2.2.2.2.1) and five 1 ml portions of sulfuric acid (5.2.2.2.2.2). Heat and keep boiling for 10 min. Allow to cool. Just dissolve the precipitate (MnO2) with hydroxylammonium chloride (5.2.2.2.2.3), add 5 ml of the potassium dichromate solution (5.2.2.2.2.4) and transfer to a 100 ml (V2) volumetric flask. Dilute to the mark with water and mix. 5.2.2.2.3.3 Determination Proceed as described in EN 1483. 5.2.2.2.4 Expression of result The interim result for mercury content (y) expressed in milligrams per litre is given by the following equation : 102AVyy×=
(8) where yA is the result obtained in 5.2.2.2.3.3, for the concentration of mercury in the test solution, expressed in milligrams per litre ; V2 is the volume in millilitres of the test solution. The mercury content, C3, in milligrams per kilogram of potassium peroxomonosulfate is given by the following equation : 1213100yCmC××=V
(9) where y is the previously determined interim result for mercury content; V1 is the volume, in millilitres, of the solution A (see 5.2.2.2.3.2); m2 is the mass, expressed in grams, of the test portion (5.2.2.2.3.1); C1 is the potassium peroxomonosulfate content in percent by mass (see 5.2.1.5). SIST EN 12678:2008
EN 12678:2008 (E) 14 6 Labelling - Transportation - Storage 6.1 Means of delivery Potassium peroxomonosulfate shall be delivered in polyethylene bags, with net contents of 25 kg to 50 kg or fibre drums with polyethylene linings, with net contents of 50 kg to 100 kg. Never use paper bags. In order that the purity of the product is not affected, the means of delivery shall not have been used previously for any different product or it shall have been specially cleaned and prepared before use. 6.2 Risk and safety labelling according to the EU Directives4)
The following labelling requirements shall apply to potassium peroxomonosulfate at the date of publication of this standard. a) symbols and indications of danger: 1) C : Corrosive; 2) O : Oxidizing; b) nature of special risks attributed to dangerous substances: 1) R 8 : Contact with combustible material may cause fire; 2) R 22 : Harmful if swallowed; 3) R 34 : Causes burns; 4) R 52 : Harmful to aquatic organisms. c) safety advice concerning dangerous substances: 1) S 26 : In case of contact with eyes, rinse immediately with plenty of water and seek medical advice; 2) S 45 : In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible); 3) S 36/37/39 : Wear suitable protective clothing, gloves and eye/face protection. NOTE Annex I of the Directive 67/548/EEC on Classification, packaging and labelling of dangerous substances and its amendments and adaptations in the European Union contains a list of substances classified by the EU. Substances not in this Annex I should be classified on the basis of their intrinsic properties according to the criteria in the Directive by the person responsible for the marketing of the substance. 6.3 Transportation regulations and labelling Potassium peroxomonosulfate is listed as UN Number 5) 3260 RID 6): Class 8, Classification Code C2, Packaging Group III.;
4) See [2]. 5) United Nations Number. 6) Regulations concerning International carriage of Dangerous goods by rail. SIST EN 12678:2008
EN 12678:2008 (E) 15 ADR 7) : Class 8,
Classification Code C2, Packaging Group II ; IMDG 8):
Class 8, Packaging Group III, EmS: F-A, S-Q; IATA 9) : Class 8, Packaging Group III. 6.4 Marking
The marking shall include the following: the name: “potassium peroxomonosulfate triple salt”, trade name and grade; the net mass; the name and address of supplier and/or manufacturer; the statement “This product conforms to EN 12678, type”. 6.5 Storage Store the product in original packages in a cool and dry place, away from any sources of heat or incompatible materials. 6.5.1 Long term stability Stable for a long period of time when stored below 25 °C and under dry conditions. The active oxygen loss per month is less than mass fraction 0,5 % relative. 6.5.2 Storage incompatibilities Avoid heat and moisture (decomposes above 60 °C). Avoid contact with alkaline or reducing substances. Avoid contact with oxidizable organic substances and combustible materials. Avoid contact with metals and metal ions (e.g. Fe, Mn, Co, Ni).
7) European Agreement concerning the international carriage of Dangerous goods by Road. 8)
International Maritime transport of Dangerous Goods. 9)
International Air Transport Association. SIST EN 12678:2008
EN 12678:2008 (E) 16 Annex A
(informative)
General information on potassium peroxomonosulfate A.1 Origin A.1.1 Raw materials Potassium
peroxomonosulfate is manufactured from oleum (sulfuric acid + SO3), hydrogen peroxide (H2O2) and potassium hydroxide (KOH). A.1.2 Manufacturing process Commercial product is formed from oleum and hydrogen peroxide, with subsequent partial neutralisation by potassium hydroxide. SO3 + H2SO4 + 2 H2O2 → 2 H2SO5 + H20
(A.1) 2 H2SO5 + 2 H2SO4 + 5 KOH → 2 KHSO5. KHSO4. K2SO4 + 5 H2O
(A.2) ----------------------------------------------------------------------------------------------------- SO3 + 3 H2SO4 + 2 H2O2 + 5 KOH → 2 KHSO5. KHSO4 - K2SO4 + 6 H2O
(A.3) A.2 Use A.2.1 Function Oxidation of oxidizable matter (organic and inorganic) in water treatment. A.2.2 Form in which it is used As an aqueous solution in demineralized water, containing 20 g/l to 200 g/l of KHSO5. A.2.3 Treatment dose Typical dose of KHSO5 is 10 mg/l (g/m3). The treatment dose should be such that limits for potassium and sulfate ions in the drinking water are not exceeded. A.2.4 Means of application The product is usually applied using a metering pump. SIST EN 12678:2008
EN 12678:2008 (E) 17 A.2.5 Secondary effects Increase of the salt content of the treated water, especially potassium ions and sulfate ions. 10 mg
KHSO5 (which corresponds to approximately to 22 mg of commercial product) corresponds to approximately 2,6 mg of K+ and 6,3 mg of SO4 2- totally. Lowering of the pH value of the water by formation of KHSO4. A.2.6 Removal of excess product Addition of reducing agents (for example sulfur dioxide (SO2), sodium sulfite (Na2SO3)). SIST EN 12678:2008
EN 12678:2008 (E) 18 Annex B
(normative)
General rules relating to safety B.1 Rules for safe handling and use The supplier shall provide current safety instructions. B.2 Emergency procedures B.2.1 First aid Skin: wash thoroughly with plenty of water and soap. Eyes: rinse immediately and thoroughly with plenty of water for at least 15 min and seek medical advice. Inhalation: remove person to fresh air, if breathing is difficult seek medical help immediately. Ingestion: give plenty of water to drink. Do not induce vomiting. Seek medical advice. B.2.2 Spillage Sweep up and collect into dry, clean, vented plastics containers. Residues are rinsed away with water. Observe locally valid waste disposal regulations. B.2.3 Fire Extinguish with water or water mist. SIST EN 12678:2008
EN 12678:2008 (E) 19 Annex C
(normative)
Determination of arsenic, antimony and selenium
...
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