2131 NTERNATIONAL STANDARD SO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION -MEXKIYHAPOJAHA OPIAHW3ALIM IO CTAHIAPTW3ALIWM·ORGANISATION INTERNATIONALE DE NORMALISATION Surface active agents -- Simplified classification First edition - 1972-11-01 ISO 2131-1972 (E) UDC 661.185 : 168.2 Ref.No. ISO 2131-1972 (E) Descriptors : surfactants, classifying Price based on 5 pages 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 Councit. International Standard ISO2131 was drawnup by Technical Committee ISo/Tc 91,Surfaceactiveagents. It was approved in June 1971 by the Member Bodies of the following countries : Australia Japan Spain Austria Korea, Rep.of Switzerland Belgium New Zealand Thailand Egypt, Arab Rep. of Poland Turkey France Portugal United Kingdom Germany Romania U.S.A. Israel South Africa, Rep.of U.S.S.R. No MemberBody expresseddisapproval of thedocument. InternationatOrganizationforStandardization,1972 Printed in Switzerland