TY - RPRT A1 - Antoni, S. A1 - Kunath, K. A1 - Lüth, Peter A1 - Simon, K. A1 - Uhlig, S. T1 - Evaluation of the interlaboratory test on the method UN O.2 / EC A.21 'Test for oxidizing liquids' 2009 - 2010 N2 - For the classification of chemicals, special standardized test procedures have been developed and are used world-wide. Safe handling and use of these chemicals depend on the correct classification which therefore must be based on the precise and correct execution of the tests and their evaluation. In this context interlaboratory tests (round robin tests, interlaboratory comparisons / intercomparisons) are a crucial element of a laboratory's quality system. Participation in interlaboratory tests is explicitly recommended by the standard ISO/IEC 17025. The present document reports on the results of the interlaboratory test 2009/2010 on the test methods UN O.2 “Test for oxidizing liquids” [1] / EC A.21 “Oxidizing Properties (Liquids)” [2] which was organized by the Center for Quality Assurance for Testing of Dangerous Goods and Hazardous Substances. The test methods UN O.2 and EC A.21 are applied to characterize the oxidizing properties of liquid chemical substances or mixtures. To differentiate between chemicals with hazardous / dangerous oxidizing properties and chemicals which are not classified as hazardous / dangerous, the substance’s oxidizing properties are compared to those of a standard reference substance. Since the methods (UN O.2 / EC A.21) were developed and came into force in the early nineties a systematic review concerning the practical application of the test method has not been carried out. KW - Oxidiser KW - Oxidierend KW - Gefahrgut KW - Dangerous goods KW - UN O.2 KW - Prüfmethode KW - Test method PY - 2011 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-250904 SN - 978-3-9814634-0-8 SP - 1 EP - 95 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin ET - Final report AN - OPUS4-25090 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Kunath, K. A1 - Lüth, Peter A1 - Uhlig, S. T1 - Interlaboratory test on the method UN test N.5 / EC A.12 'Substances which, in contact with water, emit flammable gases' 2007 N2 - For the classification of chemicals, special standardized test procedures have been developed and are used world-wide. Safe handling and use of these chemicals depend on the correct classification which therefore must be based on the precise and correct execution of the tests and their evaluation. In this context interlaboratory tests (round robin tests, interlaboratory comparisons / intercomparisons) are a crucial element of a laboratory's quality system. Participation in interlaboratory tests is explicitly recommended by the standard ISO/IEC 17025. The present document reports on the results of the interlaboratory test 2007 on the method UN Test N.5 “Test method for substances which in contact with water emit flammable gases” [1] / EC A.12 “Flammability (contact with water)” [2] which was organized by the Center for Quality Assurance for Testing of Dangerous Goods and Hazardous Substances. In dependence on the chemical structure and/or the physical form and state (e.g. particle size) substances or mixtures may be able to react with water (even water damp / air humidity) under normal ambient temperature conditions. Sometimes this reaction can be violent and/or with significant generation of heat. Especially if gases are evolved this reaction may become dangerous. In addition, it is important to know whether a substance emits flammable gases due to contact with water because special precautions are necessary especially with regard to explosion protection. The methods UN Test N.5 and EC A.12 are applied to characterize chemical substances or mixtures which in contact with water emit flammable gases. To differentiate between chemicals with these properties and chemicals which are not classified as hazardous / dangerous, the substance’s gas evolution rate is determined and compared to the classification criteria(s) in the last step of the test method. In the methods UN Test N.5 / EC A.12 no special laboratory apparatus / measuring technique to determine gas evolving flow is required. However, practical experience shows that the testing procedure for substances and mixtures which in contact with water emit flammable gases is sensitive to a number of influencing factors. Since the methods (UN N.5 / EC A.12) were developed and came into force in the early nineties a systematic review concerning the practical application of the test method has not been carried out. KW - Flammability KW - Entzündbar KW - Gefahrgut KW - Dangerous goods KW - UN N.5 KW - EC A.12 KW - Prüfmethode KW - Test method PY - 2011 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-250944 SN - 978-3-9814634-1-5 SP - 1 EP - 35 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin AN - OPUS4-25094 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -