EN 1205:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo pitne vode – Natrijev dihidrogen difosfat (V) (Na2H2P2O7)Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - DinatriumdihydrogendiphosphatProduits chimiques utilisés pour le traitement de l'eau destinée a la consommation humaine - Dihydrogénopyrophosphate de sodiumChemicals used for treatment of water intended for human consumption - Disodium dihydrogen
pyrophosphate71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 1205:2005SIST EN 1205:2005en01-julij-2005SIST EN 1205:2005SLOVENSKI
STANDARDSIST EN 1205:19991DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1205
March 2005 ICS 71.100.80 Supersedes EN 1205:1997 English version
Chemicals used for treatment of water intended for human consumption - Disodium dihydrogen
pyrophosphate
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Dihydrogénopyrophosphate de sodium
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - DinatriumdihydrogendiphosphatThis European Standard was approved by CEN on 3 February 2005.
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 national standards may be obtained on application to the Central Secretariat 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 language and notified to the Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
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B-1050 Brussels © 2005 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1205:2005: ESIST EN 1205:2005

General information on disodium dihydrogen pyrophosphate.15 Bibliography.17
EN 26595 by EN ISO 11969. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 1205:2005

– Determination of arsenic- Atomic absorption spectrometric method (hydride technique(ISO 11969:1996)). ISO 2997, Phosphoric acid for industrial use – Determination of sulfate content - Method by reduction and titrimetry. ISO 3165, Sampling of chemical products for industrial use – Safety in sampling. ISO 3357, Sodium tripolyphosphate and sodium pyrophosphate for industrial use Determination of total phosphorus (V) oxide content – Quinoline phosphomolybdate gravimetric method. ISO 3360, Phosphoric acid and sodium phosphates for industrial use (including foodstuffs) – Determination of fluorine content – Alizarin complexone and lanthanum nitrate photometric method. ISO 6206, Chemical products for industrial use – Sampling – Vocabulary. ISO 6703-1, Water quality - Determination of cyanide – Part 1: Determination of total cyanide. 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, Water quality – Determination of cobalt, nickel, copper, zinc, cadmium and lead – Flame atomic absorption spectrometric methods. ISO 9174, Water quality – Determination of chromium – Atomic absorption spectrometric methods. ISO 9965, Water quality – Determination of selenium - Atomic absorption spectrometric method (hydride technique). SIST EN 1205:2005

231-835-0. 3.2 Commercial forms The disodium dihydrogen pyrophosphate is available in a number of different forms (see 3.3.1). Different commercial forms, solids or dissolved in water are possible. All concentrations mentioned refer to the active matter and shall be calculated accordingly. NOTE Disodium dihydrogen pyrophosphate can be a component of mixtures sold for water treatment purposes. 3.3 Physical properties 3.3.1 Appearance Solid : the product is a white powder. Liquid :the product is a clear solution. 3.3.2 Density Solid : the bulk density of the product is equal to 900 g/dm3.
1) Chemical Abstracts Service Registry Number 2) European Inventory of Existing Commercial Chemical Substances. SIST EN 1205:2005

Not applicable. 3.3.6 Melting point For the solid product 650 °C. 3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) For the solid product it is not applicable. For the liquid the viscosity is equal to 5 mPa.s for a product concentration of 50 g/l. 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 The solutions of disodium dihydrogen pyrophosphate have acidic reactions. The pH value of a solution of a mass fraction of 1 %
is approximately 4,0. 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for disodium dihydrogen pyrophosphate used for 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.
3) 100 kPa = 1 bar. SIST EN 1205:2005

Limit
mg/kg of dry product Sulfate (SO42-) max. 500 Fluoride (F-) max.
10 4.4 Chemicals parameters Content of various chemical parameters depends on the origin of the raw materials, most of these elements are present only as traces. The product shall conform to the requirements specified in Table 2. SIST EN 1205:2005

Parameter
Limit
mg/kg of dry product Antimony (Sb) max. 3 Arsenic (As) max. 3 Cadmium (Cd) max. 3 Chromium (Cr) max. 10 Cyanide (CN) max. 5 Lead (Pb) max. 10 Mercury (Hg) max. 1 Nickel (Ni) max. 10 Selenium (Se) max. 3 NOTE Pesticides and polycyclic aromatic hydrocarbons are not relevant in disodium dihydrogen pyrophosphate. For parametric values of disodium dihydrogen pyrophosphate on trace metal content in drinking water, see [1]. 5 Test methods 5.1 Sampling 5.1.1 General Observe the recommendations of ISO 3165 and take account of ISO 6206. 5.1.2 Solid Prepare the laboratory sample(s) required by the relevant procedure described in ISO 8213. 5.1.3 Liquid 5.1.3.1 Sampling from drums and bottles 5.1.3.1.1 General 5.1.3.1.1.1 Mix the contents of each 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. 5.1.3.1.1.2 If 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 5.1.3.1.1.3. 5.1.3.1.1.3 Examine the surface of the liquid. If there are signs of surface contamination, take samples from the surface as described in 5.1.3.1.2. Otherwise, take samples as described in 5.1.3.1.3. 5.1.3.1.2 Surface sampling Take a sample using a suitable ladle. Lower the ladle into the liquid until the rim is just below the surface, so that the surface layer runs into it. Withdraw the ladle before it fills completely and allow any liquid adhering to the ladle SIST EN 1205:2005
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