Tetrasodium EDTA

Tetrasodium EDTA is a chelating agent used in cleaners and detailing products to bind calcium, magnesium, iron, and other metal ions that would otherwise contribute to water spots, soap scum, or reduced surfactant effectiveness in hard water. It's the workhorse chelator for budget consumer formulations. **Why it matters in detailing**: EDTA is the most common chelator in mild aqueous cleaners — bug & smudge removers, glass cleaners, wash soaps. When you see "tetrasodium EDTA" or "EDTA" in SDS Section 3 at 1–5%, it's binding mineral residue from tap water and lifting fresh organic residue from the surface. Combined with a mild alkaline builder (sodium carbonate), it provides a low-toxicity decontamination chemistry without the petroleum solvents or aggressive surfactants of dedicated bug & tar removers. **Environmental footnote**: EDTA is poorly biodegraded — wastewater treatment removes only ~25% on average. The persistence concern is environmental, not health. Newer biodegradable chelator alternatives (GLDA, IDS, MGDA) are increasingly common in EPA Safer Choice products but cost more. ## Regulatory status - Not CA Prop 65 listed - Listed on TSCA inventory; no consumer-use restrictions in the US - EU REACH: classified as persistent (P), but not bioaccumulative (B) and not toxic (T) — does not meet PBT threshold