Disodium naphthalene-2,6-disulphonateNaphthalene-2,6-disulphonic acid disodium saltNaphthalene-2,6-disulphonic acid disodium salt, 20% aqueous solutionDisodium naphthalene-2,6-disulphonate, 20% aqueous solution2,6-NAPHTHALENEDISULFONIC ACID SODIUM SALT TECHNICAL GRADE2,6-萘二磺酸 二钠盐2,6-Naphthalenedisulfonic acid disodium saltSodium naphthalene-2,6-disulfonate