ThisInternationalStandardspecifiesrequirementsforcertificatesforpuregasesandforcertificatesforhomogene-ousgasmixturestobeusedascalibrationgases.ThisInternationalStandardspecifiestheminimuminformation(mandatorydata)requiredandadditionalinformation(optionaldata)recommendedforcharacterizingapuregas,orahomogeneousgasmixture,suppliedunderpressureinacylinderorothercontainer.ThisInternationalStandarddoesnotcoverthefieldofsafety-relevantdataandre-latedlabelling.TwodifferentformatsareconsideredfortheinformationspecifiedbythisInternationalStandard:—acertificate,i.e.,adocumentuniquelyrelatedtothecontainer;and—acertificateextract,i.e.,adocumentaffixedtothecontainer.