894 NTERNATIONAL STANDARD Tso INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEKIYHAPOIHA OPTAHW3ALIMA IO CTAHIAPTH3AIMW·ORGANISATION INTERNATIONALE DE NORMALISATION Surface active agents -- Technical sodium primary alkylsulphates --- Methods of analysis Agents de surface - prim. Alkylsulfates de sodium techniques -- Methode d'analyse First edition -- 1977-11-01 NOV g -- 1 KNsr Internat Doc sec ISO B94-1977 (E) UDC 661.185 : 543 Ref. No. ISO 894-1977 (E) Descriptors : surfactants, sodium primary alkylsulphate, chemical analysis, determination of content, water, pH, alkalinity, acidity, sodium sulphates, sodium chloride. Price based on 8 pages Copyright International Organization for Standardization IsefromIHS Not for Resale FOREWORD ISO (the International Organization for Standardization) is a worldwide federation of national standards institutes (IsO member bodies). The work of developing International Standards is carried out through IsO technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. International Standard ISO 894 was developed by Technical Committee isO/Tc 91, Surface active agents, and was circulated to the member bodies in October 1975. It has been approved by the member bodies of the following countries : South Africa, Rep. of Australia Iran Belgium Japan Spain Brazi! Switzerland Mexico Canada Netherlands Turkey France New Zealand United Kingdom Poland U.S.A. Germany Hungary Portugal U.S.S.R. India Romania No member body expressed disapproval of the document. Standard cancels and replaces 1sO Recommendation This Internationat R 894-1968, of which it constitutes a technical revision. @ International Organization for Standardization, 1977 Printed in Switzerland Copyright International Organization for Standardization e from IHS ISO 894-1977 (E) INTERNATIONAL STANDARD Surface active agents -- Technical sodium primary alkylsulphates --- Methods of analysis O INTRODUCTION Determination of sodium chloride content. The word "primary" preceding the generic name for the It also sets out, in an annex, a general scheme of analysis. products in the title is intended to distinguish these products from those which, in accordance with current 2 FIELD OF APPLICATION scientific usage, could be designated as technical sodium secondary alkylsulphates. As shown in the general formula This International Standard is applicable only to technical given below, the former are derived from primary alcohols, sodium alkylsulphates in powder, paste or liquid form whereas the latter may be considered as derived from (aqueous solutions), free from any product extraneous to secondary alcohols. their manufacture. It is therefore the former which are the subject of this International Standard. They are commoniy known today 3 REFERENCES as technical sulphates of primary fatty alcohols. isO 607, Surface active agents -- Detergents -- Methods of In order to simplify the text of this International Standard sample division. 1) and avoid unecessary repetition, the word "primary" has been omitted from the term "sodium alkylsulphates", IS 2877, Sulphuric acid for industrial use - Determi- but it should be understood that only "sodium primary nation of chlorides content -- Potentiometric method. alkylsulphates" are covered. ISO 4314, Surface active agents -- Determination of free The general formula of the products which are the subject alkalinity or free acidity -- Titrimetric method. of this International Standard is ISO 4315, Surface active agents Determination of R -CH2 -O- SO3Na alkalinity -- Titrimetric method. where R is an aliphatic radical.