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See Chinese contents: GB/T 17810-2009 GB/T 17810-2009: Feed grade DL-methionine
This Standard specifies the requirements, test methods, inspection rules, labeling, packaging, storage, and transportation of feed grade DL-methionine products. This Standard applies to the feed grade DL-methionine that uses methylthiopropanal, cyanide, sulfuric acid, and sodium hydroxide as main raw materials.
