2,7-Naphthalenedisulfonic acid, 2-hydroxy-3-nitroso-, disodium salt 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-nitroso-, disodium salt 2-Hydroxy-3-nitroso-2,7-naphthalenedisulfonic acid disodium salt 525-05-3 Disodium 1-nitroso-2-naphthol-3,6-disulfonate NSC5044 Nitroso-R salt WLN: L66J BNO CQ DSWO HSWO &-NA- 2