Uses: Used as an acid-base indicator Items ...    More ...

Uses: Used as an acid-base indicator
                                           Items
                                          

Standard

                     
                                      PH
                 
                                          3.8---5.4
                yellow   green---blue
                     
                                      Maximum absorption   wavelength (nm)
                                          λ1 PH 3.8
                                          440~445
                     
                                      λ2 PH 5.4
                                          615~618
                     
                                      Mass absorption   coefficient L/cm·g
                                          α1(λ1PH 3.8,
                Dry sample)
                                          24~28
                     
                                      α2（λ2PH 5.4,
                Dry sample）
                                          53~58
                     
                                      Ethanol dissolution test
                                          qualified
                     
                                      Burning residue (as   sulfate）
                                          0.25% max
                     
                                      loss on drying
                                          3.0% max
                     
    
Less ...