2, 4 - D Sodium Salt is quite effective for aquatic herbs without causing any harm to fishes in general when used in proper dose. The Sodium Salt is used as a pre-emergent weedicide and a raw material for Esters and Amine. Sodium Salt is available in off-white to light pinkish coloured powder form having slight phenolic odour. 2, 4 - D Sodium Salt also works as an established plant growth regulator besides being a powerful [safe] systemic herbicidal agent.