3,6-bis[o-Sulfophenylazo]-4,5-di-hydroxy-2,7-naphthalenedisulfonic acidSULFONAZO III SODIUM SALT偶氮磺 III 钠盐2,7-双(2-磺酰苯基偶氮)变色酸 四钠盐3,6-双(2-磺酰苯基偶氮)-4,5-二羟基-2,7-萘二磺酸 四钠盐3,6-Bis(2-sulfophenylazo)-4,5-dihydroxy-2,7-naphthalenedisulfonic acid tetrasodium saltSulfonazo III sodium salt2,7-Bis(2-sulfophenylazo)chromotropic acid tetrasodium saltSulfonazo III saltTetrasodium 4,5-dihydroxy-3,6-bis[(2-sulfonatophenyl)azo]naphthalene-2,7-disulfonate偶氮磺 III 四钠盐