1、BRITISH STANDARD BS 4130:1984 Incorporating Amendment No. 1 Specification for Sodium hydroxide (technical grades) UDC 661.322.1BS4130:1984 This British Standard, having been prepared under the directionof the Chemicals Standards Committee, was published under the authority ofthe Board of BSI and com
2、es into effect on 31 July 1984 BSI 08-1999 First published February 1967 First revision July 1984 The following BSI references relate to the work on this standard: Committee reference CIC/22 Draft for comment 80/53297 DC ISBN 0 580 13940 9 Committees responsible for this British Standard The prepara
3、tion of this British Standard was entrusted by the Chemicals Standards Committee (CIC/-) to Technical Committee CIC/22 upon which the following bodies were represented: Chemical Industries Association Fabric Care Research Association Man-made Fibres Producers Committee Ministry of Defence Soap and D
4、etergent Industry Association Society of Glass Technology Amendments issued since publication Amd. No. Date of issue Comments 7671 April 1993 Indicated by a sideline in the marginBS4130:1984 BSI 08-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Description 1 3
5、 Sampling and size of sample 1 4 Classification 1 5 Material requirements 1 6 Packaging 1 Appendix A Information to be provided to the supplier 4 Table 1 Material requirements and methods of test 2 Table 2 Solutions of concentrations other than 46.0% 3 Publications referred to Inside back coverBS413
6、0:1984 ii BSI 08-1999 Foreword This revision of this British Standard, which has been prepared under the direction of the Chemicals Standards Committee, supersedes BS4130:1967, which is withdrawn. This standard contains requirements for technical grades of sodium hydroxide in aqueous solution and so
7、lid form, to meet the needs of government departments and other users. It designates two types of material corresponding to the two main manufacturing processes. Type 1 is usually manufactured in mercury cathode electrolytic brine cells; type3 is manufactured in diaphragm electrolytic brine cells. T
8、ype 1 material is of high purity and is largely used for rayon manufacture. Type3 material is suitable for the majority of general purposes. The standard has been revised in the light of current requirements and differs from the original in the following respects. a) The requirements for material ma
9、de by the lime soda process, designated type2, which is no longer of commercial significance in the UK, have been omitted. b) An additional form of solid material, designated “pearl”, has been included in the description. c) The test methods are not appended to this revision but are published as Par
10、ts of BS6075. In preparing BS6075 the opportunity has been taken to implement those test methods prepared by Technical Committee47, “Chemistry”, of the International Organization for Standardization (ISO) which have been prepared as a result of international collaboration in which UK experts have ac
11、tively participated. d) Units have been altered where necessary to conform with the expression of results in the associated revised test methods. To help purchasers ordering to this standard,Appendix A summarizes the information required by the supplier. WARNING. Sodium hydroxide causes severe burns
12、. Avoid contact with skin and eyes. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summa
13、ry of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front c
14、over.BS4130:1984 BSI 08-1999 1 1 Scope This British Standard specifies material requirements for technical grades of sodium hydroxide in aqueous solution and solid form for general industrial purposes, including packaging requirements. It does not apply to sodium hydroxide for medical or pharmaceuti
15、cal use, which is covered by the British Pharmacopoeia, or sodium hydroxide for photographic use, requirements for which are specified in BS3308. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Description 2.1 Solution. The material shall consis
16、t essentially of an aqueous solution of sodium hydroxide (NaOH). It shall be virtually clear and colourless and shall be free from visible impurities. 2.2 Solid. The material shall consist essentially of sodium hydroxide (NaOH). NOTE 1Its form, e.g. solid, flakes, powder, stick, pearls or pellets, s
17、hould be a matter for agreement between purchaser and supplier. NOTE 2Fused material that has been allowed to solidify in the drum in which it is supplied is generally described in the trade as “solid”. 3 Sampling and size of sample The material shall be sampled in accordance with clauses 2 and 3 of
18、 BS6075-5:1981. The sample size shall be not less than500mL for solutions or500g for solid materials. 4 Classification Sodium hydroxide in aqueous solution or solid form shall be classified as follows. a) Type 1: usually manufactured in mercury cathode electrolytic brine cells. NOTEType 1 (97.5%) so
19、lid form, containing not less than97.5% by mass of sodium hydroxide, is also specified (see5.3). b) Type 3: manufactured in diaphragm electrolytic brine cells. NOTEType 3 (unfiltered) solution is also specified (see5.4). 5 Material requirements 5.1 Type 1 and type3 solid form. These materials shall
20、comply with the relevant requirements ofTable 1, except that the requirement for maximum iron content shall not apply to fused material solidified in the drum. Testing for compliance with these requirements shall be by the methods given inTable 1, modified if necessary as indicated in column7. 5.2 T
21、ype 1 and type3 solutions. Type 1 and type3 solutions of concentration46.0% by mass of sodium hydroxide shall comply with the relevant requirements ofTable 1. For solutions of other concentrations (seeTable 2), the limits for chloride, sulphate, iron, copper and silica shall be in the same proportio
22、n to the limits given inTable 1 as are the sodium hydroxide contents to46.0%, except that the sulphate limit of all type1 solutions, irrespective of concentration, shall be20mg/kg. Testing for compliance with these requirements shall be by the methods given inTable 1, modified if necessary as indica
23、ted in column7. 5.3 Type 1 (97.5%) solid form. This material shall comply with the relevant requirements ofTable 1, with the following exceptions. a) It shall contain not less than97.5% by mass of sodium hydroxide (NaOH). b) The carbonate content, calculated as carbondioxide (CO 2 ), shall not excee
24、d1.04% by mass. c) The requirement for maximum iron content shall not apply to fused material solidified in the drum. Testing for compliance with these requirements shall be by the methods given inTable 1, modified if necessary as indicated in column7. NOTEThis material is usually supplied by agreem
25、ent between purchaser and supplier. 5.4 Type 3 (unfiltered) solution. This solution, which has not been filtered, shall comply with the requirements ofTable 1 except that it shall contain no more than2.0% by mass of chloride, calculated as sodium chloride (NaCl). Testing for compliance with these re
26、quirements shall be by the methods given inTable 1, modified if necessary as indicated in column7. NOTEThis material is usually supplied by agreement between purchaser and supplier. 6 Packaging The sodium hydroxide shall be supplied in sound, clean, and, in the case of the solid material, dry contai
27、ners. The container shall be capable of being resealed so as to avoid absorption of carbon dioxide and moisture from the atmosphere. NOTEIdentification and marking of the container should be in accordance with the purchasing contract and relevant legislation. Attention is drawn to Classification, Pa
28、ckaging and Lebelling of Dangerous Substances Regulations, SI 1984 No.1244 and amendments thereof, which are currently in force.BS4130:1984 2 BSI 08-1999 Table 1 Material requirements and methods of test 1 2 3 4 5 6 7 Property Solution Solid form Method of test (Part of BS 6075) Notes on use of meth
29、od of test Type 1 Type 3 Type 1 Type 3 Approximate solution density g/mL at20 C Tw (degrees Twaddell) 1.5 100 1.5 100 Minimum sodium hydroxide content as NaOH % by mass 46.0 46.0 99.0 a 95.0 1 BS 6075-5 and BS 6075-6 are also required in conjunction with Part1 to carry out this determination Maximum
30、 matter insoluble in water % by mass Not specified Not specified 0.05 0.05 14 Maximum carbonate content as CO 2% by mass Not specified Not specified 0.21 a 0.83 6 Use test portions weighed to the nearest0.01g as follows: type1:10g type1 (97.5%) solid form (see5.3):3g type3:5g Maximum chloride conten
31、t as Cl mg/kg 60 120 7 Use a test portion of mass corresponding to approx.5g of NaOH, weighed to the nearest0.01g as NaCl % by mass 1.1 b 2.5 2 Use a test portion of mass corresponding to approx.4g of NaOH, weighed to the nearest0.01g In 6.2.1, line2, add6mL (not 30mL) of the nitric acid solution (4
32、.1) Maximum sulphate content as SO 4mg/kg 20 200 350 350 8 Use test portions weighed to the nearest0.01g as follows: type1 solution:5g type3 solution, types1 and3 solid form:1g Maximum iron content as Fe cmg/kg 5 15 40 40 3 For types 1 and 3 solid form, use a test portion of mass approx. 15g, weighe
33、d to the nearest0.01g Maximum copper content as Cu mg/kg 0.5 1.0 2.0 2.0 12 Maximum silica content as SiO 2mg/kg 20 Not specified 40 Not specified 4 In preparing the standard colorimetric solutions (6.3.1), use the following volumes of the standard silica solution(4.9) instead of those given in the
34、table. Standard silica solution (4.9) Corresponding mass of SiO 2 mL mg 0 0.5 1.0 1.5 2.0 0 0.005 0.010 0.015 0.020 a See5.3 b See5.4 c Not applicable to fused material which has been solidified in the drum (see5.1 and5.3)BS4130:1984 BSI 08-1999 3 Table 2 Solutions of concentrations otherthan46.0% M
35、inimum sodium hydroxide (NaOH) content Density at20 C % by mass g/mL Tw 31.0 35.5 40.5 46.5 48.5 1.35 1.40 1.45 1.51 1.53 70 80 90 102 106BS4130:1984 4 BSI 08-1999 Appendix A Information to be provided to the supplier A.1 General When ordering sodium hydroxide complying with this standard, the infor
36、mation listed inA.2 andA.3 should be given to the supplier. A.2 Solutions a) The type of solution required, i.e. type1, type3 or type3 (unfiltered). b) The strength of the solution, preferably as minimum sodium hydroxide content or, alternatively, in terms of degrees Twaddell. c) Packaging and marki
37、ng details. A.3 Solid form a) The type required, i.e. type1, type3 or type1(97.5%). b) The form required, i.e. solid, flakes, powder, stick, pearls or pellets. c) Packaging and marking details.BS4130:1984 BSI 08-1999 Publications referred to BS 3308, Specification for photographic grade sodium hydro
38、xide. BS 6075, Methods of sampling and test for sodium hydroxide for industrial use. BS 6075-1, Determination of sodium hydroxide content. BS 6075-2, Determination of chloride content (mercurimetric method). BS 6075-3, Determination of iron content. BS 6075-4, Determination of silica content. BS 607
39、5-5, Sampling and preparation of main test solution. BS 6075-6, Determination of carbonate content. BS 6075-7, Determination of chloride content (photometric method). BS 6075-8, Determination of sulphate content. BS 6075-12, Determination of copper content. BS 6075-14, Determination of matter insolu
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