vat brown 1;16,23-dihydronaphth[2',3':6,7]indolo[2,3-c]dinaphtho[2,3-a:2'3'-i]carbazole-5,10,15 ,17,22,24-hexone;vat brown br powder;naphth2,3:6,7indolo2,3-cdinaphtho2,3-a:2,3-icarbazole-5,10,15,17,22,24-hexone, 16,23-dihydro-;civatbrown1;vat brown 1 (ci 70800);brown br;anthramar brown br
cas number: 2475-33-4
molecular formula: c42h18n2o6
molecular weight: 646.60212
chemical properties dark brown powder. insoluble in water, xylene (cold), slightly soluble in tetrahydronaphthalene (hot), xylene (hot). greenish gray in concentrated sulfuric acid, resulting in a brown precipitate after dilution. in the insurance powder alkaline solution was yellow brown, dark olive in the acidic solution.