1、March 2013 Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、71.100.80!$0“1961388www.din.deDDIN EN 1421Chemicals used for treatment of water intended for humanconsumption Ammonium chloride;English version EN 1421:2012,English translation of DIN EN 1421:2013-03Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Ammoniumchlorid;Englische Fassung E
3、N 1421:2012,Englische bersetzung von DIN EN 1421:2013-03Produits chimiques utiliss pour le traitement de leau destine la consommationhumaine Chlorure dammonium;Version anglaise EN 1421:2012,Traduction anglaise de DIN EN 1421:2013-03SupersedesDIN EN 1421:2005-09www.beuth.deDocument comprises 16 pages
4、In case of doubt, the German-language original shall be considered authoritative.02.13DIN EN 1421:2013-03 2 A comma is used as the decimal marker. National foreword This document (EN 1421:2012) has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNOR, France). The respo
5、nsible German body involved in its preparation was the Normenausschuss Wasserwesen (Water Practice Standards Committee), Working Committee NA 119-04-02 AA Wasseraufbereitung. Users of this standard are advised of the reservations stated in the Introduction of the European Standard and should note th
6、at national regulations exist in Germany dealing with water for human consumption, in particular the Trinkwasserverordnung (TrinkwV 2001) (German Drinking Water Ordinance). Since, as of the publication of this standard, ammonium chloride is not mentioned in the list of substances for treatment and d
7、isinfection of water in accordance with article 11 of the Trinkwasserverordnung 2001, it shall not be used for the treatment of drinking water. The DIN Standards corresponding to the International Standards referred to in this document are as follows, whereby EN ISO Standards are only listed below i
8、f these have not been published as DIN EN ISO Standards with the same number: EN ISO 3696 DIN ISO 3696 ISO 6332 DIN 38406-1 Amendments This standard differs from DIN EN 1421:2005-09 as follows: a) specifications concerning hazard and safety related symbols have been brought in line with the “Globall
9、y Harmonized System of Classification, Labelling and Packaging of Chemicals (GHS)” (Global harmonisiertes System zur Einstufung und Kennzeichnung von Chemikalien). Previous editions DIN EN 1421: 1996-06, 2005-09 National Annex NA (informative) Bibliography DIN 38406-1, German standard methods for th
10、e examination of water, waste water and sludge Cations (group E) Determination of iron (E 1) DIN ISO 3696, Water for analytical laboratory use Specification and test methods Verordnung ber die Qualitt von Wasser fr den menschlichen Gebrauch (Trinkwasserverordnung TrinkwV 2001) (German Drinking Water
11、 Ordinance), as of 28 November 2011 (BGBI. I p. 2370), as amended by Article 2, Paragraph 19 of the Act of 22 December 2011 (BGBI. I p. 3044)*)*)Obtainable from: Bundesministerium der Justiz (German Federal Ministry of Justice) (Internet: http:/www.gesetze-im-internet.de). EUROPEAN STANDARD NORME EU
12、ROPENNE EUROPISCHE NORM EN 1421 November 2012 ICS 71.100.80 Supersedes EN 1421:2005English Version Chemicals used for treatment of water intended for human consumption - Ammonium chloride Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Chlorure dammonium Produ
13、kte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Ammoniumchlorid This European Standard was approved by CEN on 23 September 2012. 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 n
14、ational standard without any alteration. Up-to-date lists and bibliographical references concerning such 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
15、version in any other language made by translation under the responsibility of a CEN member into its own language 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, Cypru
16、s, 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 United King
17、dom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1421:2012: EEN 1421
18、:2012 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Description .54 Purity criteria 75 Test methods 96 Labelling Transportation Storage . 10Annex A (informative) General information on ammonium chloride 12Annex B (normative) General rules relating to safety 13Biblio
19、graphy . 14DIN EN 1421:2013-03 EN 1421:2012 (E) 3 Foreword This document (EN 1421:2012) 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
20、identical text or by endorsement, at the latest by May 2013, and conflicting national standards shall be withdrawn at the latest by May 2013. 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 res
21、ponsible for identifying any or all such patent rights. This document supersedes EN 1421:2005. The significant technical differences between this edition and EN 1421:2005 are as follows: Modification of 6.2 on labelling, deletion of the reference to EU Directive 80/778/EEC of 15 July 1980 in order t
22、o take account of the latest Directive in force. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, F
23、ormer 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 United Kingdom. DIN EN 1421:2013-03 EN 1421:2012 (E) 4
24、 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 State
25、s 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 o
26、r 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. DIN EN 1421:2013-03 EN 1421:2012 (E) 5 1 Scope This European Standard is applicable to ammonium chloride used
27、 for treatment of water intended for human consumption. It describes the characteristics and specifies the requirements of ammonium chloride and refers to the corresponding analytical methods. It gives information for its use in water treatment. It also determines the rules relating to safe handling
28、 and use of ammonium chloride (see Annex B). 2 Normative references 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
29、 the referenced document (including any amendments) applies. EN 1233, Water quality Determination of chromium Atomic absorption spectrometric methods EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO 3696) EN ISO 11885, Water quality Determination of selected eleme
30、nts by inductively coupled plasma optical emission spectrometry (ICP-OES) (ISO 11885) EN ISO 11969, Water quality Determination of arsenic Atomic absorption spectrometric method (hydride technique (ISO 11969) EN ISO 12846, Water quality Determination of mercury Method using atomic absorption spectro
31、metry (AAS) with and without enrichment (ISO 12846) ISO 2762,Hydrochloric acid for industrial use Determination of soluble sulfates Turbidimetric method ISO 3165, Sampling of chemical products for industrial use Safety in sampling ISO 3332, Ammonium sulphate for industrial use Determination of ammon
32、iacal nitrogen content Titrimetric method after distillation ISO 6206, Chemical products for industrial use Sampling Vocabulary ISO 6332, Water quality Determination of iron Spectrometric method using 1,10-phenanthroline ISO 8213, Chemical products for industrial use Sampling techniques Solid chemic
33、al 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 metho
34、d (hydride technique) 3 Description 3.1 Identification 3.1.1 Chemical name Ammonium chloride. DIN EN 1421:2013-03 EN 1421:2012 (E) 6 3.1.2 Synonym or common name Sal-ammoniac. 3.1.3 Relative molecular mass 53,5. 3.1.4 Empirical formula NH4Cl. 3.1.5 Chemical formula NH4Cl. 3.1.6 CAS Registry Number 1
35、)12125-02-9. 3.1.7 EINECS reference 2)235-186-4. 3.2 Commercial form Ammonium chloride is available as a powder. 3.3 Physical properties 3.3.1 Appearance and odour The product is a white powder or white crystals, without any odour. 3.3.2 Density The density of the product is 1,53 g/cm3at 20 C. The b
36、ulk density is 0,6 g/cm3to 1 g/cm3depending on particle size. 3.3.3 Solubility in water The solubility of the product in water at 20 C is 374 g/l. The solubility of the product in water at 50 C is 504 g/l. NOTE Dissolution of NH4Cl in water is a strongly endothermic reaction and the resulting decrea
37、se in temperature can lead to crystallisation. 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. DIN EN 1421:2013-03 EN 1421:2012 (E) 7 3.3.4 Vapour pressure 100 Pa at 160 C. 3.3.5 Boiling point at 100 kPa 3) Not applicable. 3.3.6 Meltin
38、g point Sublimation at 338 C. 3.3.7 Specific heat Not known. 3.3.8 Viscosity 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 The pH value of an aqueous solution of mass fraction of 5
39、% is 4 to 6. Ammonium chloride attacks metals, e.g. iron, copper, nickel, zinc. Reaction with strong acids can generate hydrochloric acid gas; reaction with strong alkalis can generate ammonia gas. 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for amm
40、onium chloride 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 necessar
41、y, to relevant authorities. 3) 100 kPa = 1 bar. DIN EN 1421:2013-03 EN 1421:2012 (E) 8 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, req
42、uired dosage, contents of other impurities and additives used in the product not stated in this product standard. Limits have been given for impurities and chemical parameters where these are likely to be present in significant quantities from the current production process and raw materials. If the
43、 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 content of ammonium chloride (NH4Cl) shall not be less than a mass fraction of 99 %. 4.3 Impuritie
44、s and main by-products The product shall conform to the requirements specified in Table 1. Table 1 Impurities Impurity Limit (mg/kg) of the product Sulfate (SO42-) max 100 Iron (Fe) max 5 4.4 Chemical parameters The product shall conform to the requirements specified in Table 2. Table 2 Chemical par
45、ameters Parameter Limit (mg/kg) of the product Antimony (Sb) max 1 Arsenic (As) max 5 Cadmium (Cd) max 0,5 Chromium (Cr) max 5 Lead (Pb) max 5 Mercury (Hg) max 0,1 Nickel (Ni) max 5 Selenium (Se) max 1 NOTE Pesticides and polycyclic aromatic hydrocarbons and cyanides (CN) are not relevant in ammoniu
46、m chloride because the raw materials used in the manufacturing process are free of them. For parametric values of ammonium chloride on trace metal content in drinking water, see 1. DIN EN 1421:2013-03 EN 1421:2012 (E) 9 5 Test methods 5.1 Sampling Observe the general recommendations of ISO 3165 and
47、take account of ISO 6206. Prepare the laboratory sample(s) required by the relevant procedure described in ISO 8213. 5.2 Analyses 5.2.1 Main product The determination of the ammoniacal nitrogen by titration after distillation is carried out in accordance with ISO 3332. 5.2.2 Impurities 5.2.2.1 Iron
48、(Fe) The iron content shall be determined in accordance with ISO 6332. 5.2.2.2 Sulfate The sulfate (SO42-) content shall be determined in accordance with ISO 2762. 5.2.3 Chemical parameters 5.2.3.1 Determination of antimony (Sb), arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), mercury (Hg), ni
49、ckel (Ni) and selenium (Se) 5.2.3.1.1 Principle The elements antimony, arsenic, cadmium, chromium, lead, mercury, nickel and selenium are determined by atomic absorption spectrometry. 5.2.3.1.2 Reagents All reagents shall be of a recognised analytical grade and the water used shall conform to grade 3 specified in EN ISO 3696. 5.2.3.1.2.1 Hydrochloric acid, concentrated density = 1,18 g/ml. 5.2.3.1.3 Procedure 5.2.3.1.3.1 Test portion Weigh, to the ne
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