L-Aspartic acid, N,N’-1,2-ethanediylbis-, sodium salt (1:3);

CAS No.: 178949-82-1
EC / List no.: 605-842-8

Synonyms:
N,N’-EthyleneDiamine Disuccinic acid Sodium salt, EDDS;
Trisodium ethylenediamine disuccinate; エチレンジアミンジコハク酸３Ｎａ;
(S,S)-Ethylenediamine disuccinic acid trisodium salt;
Sodium ethylene diamine disuccinate;
IUPAC Name:
trisodium 2-({2-[(1-carboxy-2-carboxylatoethyl)amino]ethyl}amino) butanedioate

EDDS trisodium is an chelating agent (sequestering/complexing agent).
EDDS is made from L-aspartic acid, readily biodegradable, phosphorus-free.

Especially in hard water systems, EDDS is still excellent at chelating transition metal ions (e.g. Fe³⁺, Cu²⁺), before chelating hard water ions (calcium, magnesium).

Features

1. In hard water, relative to calcium and magnesium ions, it still has high selectivity for transition metal ions such as copper and iron.
2. Within a wide pH range, EDDS can effectively complex and sequester heavy metals such as Fe³⁺, Cu²⁺, and Ca²⁺, Mg²⁺.
3. High thermal stability, high stability in concentrated alkaline solutions.

Technical Data

Appearance	Colorless to yellow-brown liquid
Odor	Characteristic
Solubility	Soluble in water
Solid content [%]	45 min.
Active content (EDDS-Na) [%]	37 min.
pH-Value at 25℃	9.0 min.
Density at 25℃ [g/cm3]	1.25 min.

Main functions

1. It has high selectivity for copper and iron ions. In the presence of calcium and magnesium, transition metal ions such as copper, and iron ions are still preferentially chelated.
2. Reduce the impact of water hardness in formula or process use, and improve the compatibility of hard water.
3. Improve the effectiveness of fungicides in the formula.
4. Prevent discoloration and odor. Improve antioxidant properties, reduce the oxidation catalysis of heavy metals on fatty acids, and prevent odor and discoloration.
5. High stability, suitable for wide pH values, resistant to strong alkaline environments, and resistant to high temperatures.
6. Environmentally friendly chelating agent, easy to biodegradable and easy to rinse.

Application fields

Household detergents, clothing cleaning agents, I&I (industrial and Institute) cleaning agents, textile printing and dyeing auxiliaries, bleach stabilizers, photographic agents, pulp and paper additives, descaling and anti scaling agents, metal treatment processing aids, steel plate cleaning agents, semiconductor cleaning agents, aluminum shell anti sedimentation (aluminum etching), electroplating pre-treatment agents (degreasing agents, rust removers), water treatment agents, agriculture, soil improvement agents, personal care Cosmetic use, etc.

Package and storage

25kg or 30kg per plastic drum;
250kg per plastic drum; 1250kg per IBC.
Store in a cool and ventilated place indoors, moisture-proof, storage period of 12 months.

Similar chemical

EDDA acid (without sodium salt) Synonyms:
CAS# 20846-91-7 (EC# 439-840-1);
L-Aspartic acid, N,N’-1,2-ethanediylbis-;
N,N’-Ethylenediamine disuccinic acid;
BISASPARTIC ACID, N,N-[1,2-ETHANEDIYL]-;

Other chelating agents

Traditonal Chelating Agents
Aminopolycarboxylates: EDTA acid, EDTA-Na/K, DTPA & DTPA-5Na/5K
Polyphosphonates: HEDP, DTPMP, ATMP, PBTCA