2,7-Naphthalenedisulfonicacid, 3,6-bis[2-(2-arsonoylphenyl)diazenyl]-4,5-dihydroxy-, sodium salt (1:2)

3,6-bis[2-(2-arsonophenyl)diazenyl]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid sodium salt ; 3,6-bis[(2-arsonophenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt ; 3,6-bis(2,2'-arsonophenylazo)-4,5-dihydroxy-2,7-naphthalenedisulfonic acid, disodium salt ; 2,7-bis(o-arsonophenylazo) chromotropic acid ; arsenazo iii disodium salt ; disodium 3,6-bis[(o-arsonophenyl)azo]-4,5-dihydroxynaphthalene-2,7-disulphonate ; arsenazo-iii disodium salt ; arsenazo iii ; arsenazo iii disodium salt, reag. ; 2,7-naphthalenedisulfonicacid, 3,6-bis[(2-arsonophenyl)azo]-4,5-dihydroxy-, disodium salt (9ci) ; arsenazo iii disodium salt p.a. ; 2,7-bis(2-arsenophenylazo)-1,8-dihydroxynaphtalene-3,6-disulfonic acid, disodium salt