Which form of 2,4-D is a dimethyl amine salt used as an aquatic herbicide?

• A. Dimethyl amine salt (Clean Amine, Amine 4, DMA4)
• B. Butoxyethyl ester (Aqua-Kleen, Navigate)
• C. Glyphosate salt
• D. Isopropyl ester

Answer: (A)

The form that’s used as an aquatic herbicide is the dimethyl amine salt of 2,4-D. This salt form, often called DMA4, is highly water-soluble, which makes it effective for treating weeds in water. It’s sold under names like Clean Amine or Amine 4, and is specifically formulated to work in aquatic environments where dissolve-in-water activity helps the chemical reach and affect target plants.

The other forms are different types of 2,4-D formulations that aren’t optimized for water. Butoxyethyl ester and isopropyl ester are ester forms that are less soluble in water and are typically used for other application contexts, not aquatic use. Glyphosate salt is a different herbicide altogether, not a 2,4-D salt.