4327-79 SE92E00 E06 INTERNATIONAL STANDARD ISO 4327-1979 (E)/ERRATUM H - 14 -12 Tso Published 1980-05-15 INTERNATIONALORGANIZATIONFORSTANDARDIZATION+MEKAYHAPOAHAAOPTAHM3AUMAIOCTAHAAPTИ3ALWM-ORGANISATIONINTERNATIONALEDENORMALISATION Non-ionic surface active agents -- Polyalkoxylated derivatives -- Determination of hydroxyl value . Phthalic anhydride method ERRATUM Page 1 4 DEFINITION Replace the text by the following : "hydroxyl vatue I(OH) : The number of milligrams of potassium hydroxide needed to neutralize the phthalic acid required to esterify the hydroxyl groups in 1 g of the material, or the number of milligrams of potassium hydroxide corresponding to the hydroxyl groups in 1 g of the material." Page 3 11.1 Method of calculation Replace the formula by the following : "(V- V,) ×Tx56,10 2+ mo. 62-22Eh 6 9E92E00 E065 International Standard (ISO 4327 13 -0 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION+MEXAYHAPOAHAH OPIAHM3ALMA NO CTAHAAPTW3AMM-ORGANISATION INTE RNATIONALE DE NORMALISATION Non-ionic surface active agents - Polyalkoxylated derivatives --- Determination of hydroxyl value - Phthalic anhydride method Agents de surface non ioniques - Derives polyoxyalkylenés - Détermination de I'indice d'hydroxyle - Methode a I'anhydride phtalique First edition --- 1979-12-15 UDC 661.185.4 : 543.854 Ref. No. 1SO 4327-1979 (E) 1SO 4327-1979 (E) Descriptors : surfactants, non-ionic surfactants, polyalkoxylated derivatives, chemical analysis, determination, hydroxyl value. Price based on 8 pages COPYRIGHT on for Standardization 4327-79 48519030032637 FOREWORD IsO (the Internationa! Organization for Standardization) is a worldwide federation of national standards institutes (lsO 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. Standard SO 4327 was developed by Technical Committee International IsO/Tc 91, Surface active agents, and was circulated to the member bodies in June 1976. It has been approved by the member bodies of the following countries : Australia Ireland Romania Austria Japan South Africa, Rep. of Belgium Korea, Rep. of Switzerland Brazil Mexico Turkey France United Kingdom Netherlands Germany, F.R. New Zealand India Poland The member bodies of the following countries expressed disapproval of the document on technical grounds : Chile Spain @ International Organization for Standardization, 1979 : Printed in Switzerland COPYRIGHT Inte Sta