5272 NTERNATIONAL STANDARD TSO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION-MEKJAYHAPOAHAA OPTAHW3ALIM IIO CTAHJAAPTW3ALIWW·ORGANISATION INTERNATIONALE DE NORMALISATION ANTeSe Toluene for industrial use -- Specifications Tolueneausageindustriel-Specifications First edition - 1979-02-01 FEH021979 UDC547.533 Ref.No. 1SO 5272-1979 (E) rs: aromatic hydrocarbons,toluene,materials specifications. Price based on 2 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 StandardsbytheISOCouncil. International Standard ISO5272 2was developed byTechnical Committee ISo/Tc78, Aromatic hydrocarbons and was circulated to the member bodies in October 1977. It has been approved by the member bodies of the folfowing countries : Australia Hungary Portugal. Austria India Romania Brazil Korea,Rep.of South Africa, Rep. of Bulgaria Mexico Turkey Czechoslovakia Netherlands United Kingdom Egypt, Arab Rep. of Philippines U.S.S.R. Germany, F.R. Poland The member bodies of the following countries expressed disapproval of the document on technical grounds : France Italy @International Organization for Standardization,1979 Printed in Switzerland INTERNATIONALSTANDARD ISO 5272-1979 (E) Toluene for industrial use -- Specifications WARNING -- Toluene is flammable and toxic by inhalation, IsO5275,Aromatichydrocarbons-Testforpresenceof ingestion or skin absorption. mercaptans (thiols)-Doctortest. ISo 5276,Aromatic hydrocarbons -- Test for neutrality. 1 SCOPEANDFIELDOFAPPLICATION ISo 5277.Aromatic hydrocarbons - Determination of This International Standard specifies requirements for two residue on evaporation.1) grades of toluene suitable for industrial purposes. ISO 5279,Toluene for industrial use -Determination of Grade 1 (synthesis grade) is a high quality grade normally impurities-Gaschromatographicmethod.1) required for use only as a chemical feedstock. Grade 2 IsO5281,Aromatic hydrocarbons - (ordinary grade) relates to commercially pure toluene and Determination of density at 20 °c. issuitableformostnormalcommercial uses This International Standard is applicable to material which ISO6271,Clear liquids Estimationofcolourbythe platinum-cobalt scale.1) consists essentially of toluene (CHg.CH3). 3 REQUIREDCHARACTERISTICS Grade1(synthesis grade)and grade 2 (ordinary grade) 2 REFERENCES toluene shall conform to the appropriate requirements Iso 2160, Petroleum products - Corrosiveness to copper - shown in the tabie. Copperstriptest. NOTE - Until such time as the test methods have been published Iso2211,Liquid chemical products -- Measurement of as International Standards, the methods used shall be the subject of agreement between the interested parties. colour in Hazen units (platinum-cobalt scale). Iso 4626,Volatile organic liquids - Determination of 4 SAMPLING2) boiling range. Take a representative sample of not less than 1 000 ml from Is 5274,Aromatic hydrocarbons -Acid-wash test. the bulk of the material. 1)At present at the stage of draft. 2) The sampling of toluene and other aromatic hydrocarbons will form the subject of a future International Standard. Convrinht internatinnal Ornanizatinn fnr Stanriarrlizatinr