Patentansprak: FOrfaringssatt for framstallning av ett arsenogruppen innehallande a,zofargamne, kanneteeknat darav, att man i narvaro av jodvatesyra medelst underfosforsyrlighet reducerar det ur ,diazoterad 4-oxi-3-amidofeny1-1-arsinsyra ochPatent claim: A process for the preparation of an arsenic group containing a, zofar game, characterized in that in the presence of iodic acid by subphosphoric acid it is reduced from diazotized 4-oxy-3-amidophenyl-1-arsenic acid and1. -nafto1-1,8-disulfonsyra erhallna azofargamnet. Stockholm 1941. Kungl. Boktr. P. A. Norotedt Skier 4100891.-Naphtho-1-,8,8-disulfonic acid receive the azofar gum Stockholm 1941. Kungl. Boktr. P. A. Norotedt Skier 410089