Acid Blue 9 (Brilliant Blue FCF)

C.I. No.：C.I.42095

CAS No.：3844-45-9

Molecular Formula：C₃₇H₃₄N₂O₉S₃Na₂

Chemical Name：

Bis[4-(N-ethyl-N-3’-sulfophenylmethyl)aminophenyl]-2-sulfo-phenylmethylium disodium salt

Structure Formula：

Application Properties:（Changes after 48 hours at room temperature）

          ①、Stability in various pH solutions

                        pH=4                  no noticeable change

                        pH=5                  no noticeable change

                        pH=6                  no noticeable change

                        pH=7                  no noticeable change

                        pH=8                  no noticeable change

           ②、Stability in aqueous acids

                       10% Acetic acid                       no noticeable change

                       10% Citric acid                        no noticeable change

                       10% Tartaric acid                    no noticeable change

                       10% Malic acid                       no noticeable change

           ③、Stability in aqueous alkalis

                      10% Ammonium hydroxide          appreciable fade

                      10% Sodium carbonate                fade

                      10% Sodium bicarbonate             slight fade

                      10% Sodium hydroxide                 fade