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          Phosphorus trichloride
          Phosphorus oxychloride
          Phosphorous acid
          Hydrochloric acid
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          Product Name Phosphorous acid
          CAS RN 13598-36-2
          EINECS Number 237-066-7
          Molecular Formula H3PO3
          Molecular Weight 88.0434
          Physical and chemical property Colorless crystals
          Use Used as a reducing agent, nylon whitening agent, also used as Phosphorous acid salt, raw
                  materials, pesticide intermediates.
          Structural Formula
           
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