... Phosphorous acid, phosphoric acid 2)reducing agent, nylon whitener, plastic thermometer,etc 3)CAS no:13598-36-2 4)98%min product: phosphorous acid, phosphoric acid ... Application:Phosphorous acid is used as reducing agent, nylon ... 0.001 max0.002 maxPhosphate (as PO4),%0.1 max0.2 maxHeavy metal (as Pb),%0.001 max0.001 max Packing ...