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See Chinese contents: GB/T 4842-2006 GB/T 4842-2006: Argon
This Standard specifies the requirements, test methods, packaging, labeling, storage, and security of pure argon and high purity argon. This Standard applies to the gaseous and liquid pure argon, and high purity argon extracted from the air and ammonia exhaust by cryogenic method; and pure argon and high purity argon obtained by purification method. They are mainly used in metal smelting and welding, semiconductor manufacturing, electric light, preparation of standard samples, scientific research and other industries. Molecular formula: Ar. Relative molecular mass: 39.948 (according to 2001 international relative atomic mass).
