| Melting point | ≥300 °C | 
                        
                            | alpha | [α]D20 0±0.5゜(c=2,1mol/l HCl) | 
                        
                            | Boiling point | 507.6±50.0 °C(Predicted) | 
                        
                            | Density | 1.4269 (rough estimate) | 
                        
                            | refractive index | 1.6300 (estimate) | 
                        
                            | storage temp. | Keep in dark place,Inert atmosphere,Room temperature | 
                        
                            | solubility | Aqueous Acid (Slightly). Aqueous Base (Slightly) | 
                        
                            | form | powder to crystal | 
                        
                            | pka | 1.90±0.10(Predicted) | 
                        
                            | color | White to Light yellow | 
                        
                            | Water Solubility | 0.2g/L(25 ºC) | 
                        
                            | Merck | 14,4735 | 
                        
                            | BRN | 1728581 | 
                        
                            | Stability | Stable. Incompatible with strong oxidizing agents. | 
                        
                            | CAS DataBase Reference | 870-93-9(CAS DataBase Reference) | 
                        
                            | EPA Substance Registry System | Butanoic acid, 4,4'-dithiobis[2-amino-, (2R,2'R)-rel- (870-93-9) |