| 
                                            外观
                                         | 
                                        
                                        
                                            pale red powder (anhydrous)   red crystalline (hexahydrate)
                                         | 
                                    
                                
                                    
                                        | 
                                            沸点
                                         | 
                                        
                                        
                                            100–105 °C, decomp (hexahydrate)   74 °C, decomp (hexahydrate)
                                         | 
                                    
                                
                                    
                                        | 
                                            密度
                                         | 
                                        
                                        
                                            2.49 g/cm3 (anhydrous)   1.87 g/cm3 (hexahydrate)
                                         | 
                                    
                                
                                    
                                        | 
                                            熔点
                                         | 
                                        
                                        
                                            100 °C, decomp (anhydrous)   55 °C (hexahydrate)
                                         | 
                                    
                                
                                    
                                        | 
                                            气味
                                         | 
                                        
                                        
                                            odorless (hexahydrate)
                                         | 
                                    
                                
                                    
                                        | 
                                            溶解度
                                         | 
                                        
                                        
                                            hexahydrate: 134 g/100 mL (0 °C)   103.8 g/100 mL (25 °C)   soluble (anhydrous) in water
                                         | 
                                    
                                
                                    
                                        | 
                                            溶解度
                                         | 
                                        
                                        
                                            soluble in alcohol, acetone, ethanol, ammonia (hexahydrate)
                                         | 
                                    
                                
                        
                            
                                    
                                        | 
                                            欧盟危险品索引
                                         | 
                                        
                                        
                                            027-009-00-2
                                         | 
                                    
                                
                                    
                                        | 
                                            欧盟危险性物质标志
                                         | 
                                        
                                        
                                            Carc. Cat. 2
                                         | 
                                    
                                
                                    
                                        | 
                                            欧盟危险性物质标志
                                         | 
                                        
                                        
                                            Muta. Cat. 3
                                         | 
                                    
                                
                                    
                                        | 
                                            欧盟危险性物质标志
                                         | 
                                        
                                        
                                            Repr. Cat. 2
                                         | 
                                    
                                
                                    
                                        | 
                                            欧盟危险性物质标志
                                         | 
                                        
                                        
                                            Toxic (T)
                                         | 
                                    
                                
                                    
                                        | 
                                            欧盟危险性物质标志
                                         | 
                                        
                                        
                                            Dangerous for the environment (N)
                                         | 
                                    
                                
                                    
                                        | 
                                            半数致死量
                                         | 
                                        
                                        
                                            434 mg/kg; rat, oral (anhydrous)   691 mg/kg; rat, oral (hexahydrate)
                                         | 
                                    
                                
                                    
                                        | 
                                            NFPA704
                                         | 
                                        
                                        
                                            
                                         | 
                                    
                                
                                    
                                        | 
                                            危险公开号
                                         | 
                                        
                                        
                                            R49, R60, R42/43, R68, R50/53
                                         | 
                                    
                                
                                    
                                        | 
                                            RTECS编号
                                         | 
                                        
                                        
                                            GG1109000
                                         | 
                                    
                                
                                    
                                        | 
                                            安全公开号
                                         | 
                                        
                                        
                                            S53, S45, S60, S61
                                         |