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      Product name Specifications Packing Unit price / yuan
      Tannic acid standard solution
      Potassium iodate standard solution
      Potassium iodate-potassium iodide standard solution
      P-nitrobenzoic acid standard solution
      P-nitrophenol standard solution
      Nitrogen oxide standard liquid
      Diantipyrine methane standard solution
      Oil bromine valence standard liquid 100ml
      Lithium bromide standard solution 50ml
      Cobalt chloride standard solution 500ml
      2.4-Dichloro standard liquid 50ml
      Isobutanol isoamyl alcohol standard solution 5ml
      Isobutanol standard solution 50ml
      Isopropanol-ethanol standard solution 50ml
      Cumene standard solution 50ml
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