1,3-Benzenediamine, 4,4'-[(4-methyl-1,3-phenylene)bis(azo)]bis[6-methyl-, dihydrochloride 5421-66-9 Astra Vesuvine B Basic Brown 2K Bismarck Brown Bismarck Brown R Bismark Brown R C.I. 21010 C.I. Basic Brown 4 C.I. Basic Brown 4, dihydrochloride NSC7812 Vesuvine