(S,S)-Ethylenediamine-N,N'-disuccinic acid trisodium salt

(S,S)-Ethylenediamine-N,N'-disuccinic acid trisodium salt (CAS 178949-82-1) is a biodegradable aminopolycarboxylate chelating agent, commercially available under trade names including Octaquest E30 and Natrlquest E30, and commonly abbreviated as (S,S)-EDDS-Na3. It carries no assigned E-code and is registered under EC 416-530-4.

In water treatment, it sequesters calcium, magnesium, and heavy metal ions to prevent scale formation and inhibit metal-catalysed degradation reactions. In personal care formulations, it stabilises peroxide-based systems and prevents trace metal interference with preservatives. Its high biodegradability distinguishes it from EDTA in applications where environmental discharge is regulated.

The product is supplied in liquid form as an aqueous trisodium salt solution and is subject to REACH registration within the EU. Procurement teams should confirm concentration grade and packaging format directly with the supplier, as these vary by production batch and regional distribution agreements.