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Physical and chemical properties: at ambient temperature, it is a while granule, needle, rod, block or block agglomerate shape, having strong irritant.Relative density:1.48, M.P.:52.8℃, B.P.:202.2℃. Under lower temperature (60-80℃), it can sublimate, soluble in ethanol, ether and acetone, can react with water to produce maleic acid, combustible. If its vapor is mixed with powder dust and air, it may form exploded mixture.
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