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See Chinese contents: GB 10500-2009 GB 10500-2009: [GB/T 10500-2009] Sodium sulfide for industrial use
This standard specifies the requirements, testing method, inspection rules, marking, labeling, packing, transporting and storage of sodium sulfide for industrial use. This standard is applicable to lump, flaky and grainy sodium sulfide for industrial use, which is used in fields like paper making, dyestuff, mineral processing and printing.
