... %, 99.99% and 99.999% Pure Gases,High Purity GasesProduct nameTechnical index(%) StandardUnit ApplicationPure hydrogen ≥99 ... , chemical industry, analysisPure Neon ≥99.99 CylinderMaking lamp, chemical industry, analysisPure Argon ≥99.99GB/T4842-95CylinderIndustry ... 99.996GB/T4844.3-1995CylinderChemical industry, electronic industry, lamp, analysisHigh Purity Oxygen ≥99.999GB/T14599-93CylinderCutting, ...