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Physiological properties The solid or solution contact with eyes may cause irritability and inflammation. Prolonged or repeated skin contact may cause slight pain. A large number of take in can cause the nose, throat and upper respiratory tract infection. First aid  Eye contact:In the event of eye contact occurring immediately irrigate with copious quantities of clean water,holding the eye open if necessary.Obtain medical attention. Skin contact:Wash with water.Remove contaminated clothing,which should be washed before re-use. Ingestion:Rinse the mouth with water.Obtain medical attention.  Physical properties Molecular mass                           77.08 Flash point                                  136℃ Solubility in water:at 4℃              148g/100ml Melting…

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