Iminodisuccinic Acid Sodium Salt: A Versatile and Eco-Friendly Chelating Agent

Iminodisuccinic acid sodium salt (IDS), commercially known as tetrasodium iminodisuccinate, represents a breakthrough in sustainable chemistry. As a high-performance, biodegradable chelating agent, IDS offers an environmentally responsible alternative to traditional phosphates and persistent synthetic chelators like EDTA. With the chemical formula C₈H₇NNa₄O₈ and molecular weight of 337.1 g/mol (CAS: 144538-83-0), IDS combines exceptional metal-binding capabilities with excellent environmental compatibility. Its adoption reflects the industrial shift toward green chemistry principles driven by tightening environmental regulations and growing demand for sustainable solutions.

Product Profile and Distinctive Chemical Properties

Typically supplied as a colorless to pale yellow transparent liquid, IDS maintains consistent technical specifications optimized for industrial applications:

• Active Content: 33-35%

• pH Profile: 10.5-11.5 (10% aqueous solution)

• Density: 1.30-1.38 g/cm³ at 20°C

• Viscosity: 20-60 mPa·s at 20°C

The molecular structure of IDS features multiple carboxylate groups arranged around a central nitrogen atom, enabling stable complexes with di- and trivalent metal ions. Its superior chelation power—particularly for iron and copper—outperforms EDTA in both binding capacity and selectivity. This capability is critical in applications like peroxide stabilization, where uncontrolled metal catalysis would degrade oxidants. IDS maintains exceptional stability in alkaline environments and across temperature ranges, making it suitable for demanding industrial processes.

Environmental Advantage: Intrinsic Biodegradability

Unlike conventional chelators that persist in ecosystems, IDS undergoes rapid microbial degradation—typically achieving >80% breakdown within 28 days. This biodegradability stems from its molecular design incorporating readily metabolizable fragments. Consequently, IDS avoids the ecological accumulation associated with EDTA or NTA, positioning it as a regulator-approved solution in regions with strict discharge policies. Its classification as a non-hazardous substance simplifies handling and transportation.

Diverse Industrial Applications

The versatility of IDS arises from its dual functionality as a high-performance chelator and eco-compatible additive:

• Detergent & Cleaning Formulations: Enhances cleaning efficiency by sequestering water hardness ions (Ca²⁺, Mg²⁺). Prevents catalytic decomposition of peroxides in laundry and dishwasher formulations.

• Water Treatment: Controls scale formation and corrosion in cooling and boiler systems through effective metal ion complexation.

• Textile Processing: Used in peroxide bleaching baths for cotton to prevent metal-induced fiber damage and ensure uniform whiteness.

• Agriculture: Serves as an efficient carrier for micronutrients in fertilizers. IDS complexes break down naturally in soil, delivering nutrients without long-term residues—ideal for hydroponics and foliar sprays.

• Industrial Cleaning: Effectively dissolves stubborn iron sulfide scales in pipelines without corroding infrastructure.

Packaging and Storage Recommendations

Commercial IDS solutions are packaged in high-density polyethylene drums (25 kg, 250 kg, 1250 kg). For optimal stability, store in cool, dry environments (<30°C) with containers tightly sealed to prevent moisture absorption. Under proper conditions, IDS maintains functionality for over 12 months. While classified as non-hazardous, standard industrial hygiene practices should be observed during handling.

Advancing Green Chemistry: The Yuanlianchem Advantage

As a leader in sustainable specialty chemicals, Yuanlian Chemical (Yuanlianchem) has established advanced manufacturing capabilities for high-purity IDS. The company's commitment to green chemistry is demonstrated through:

• Specialized Production: Operating a dedicated facility with annual capacity exceeding 5,000 tons of tetrasodium iminodisuccinate

• Quality Control: Implementing rigorous analytical protocols ensuring consistent product specifications

• Technical Expertise: Maintaining a specialized R&D team focused on chelator innovation

• Supply Chain Reliability: Providing flexible packaging options and logistical support for global customers

Yuanlianchem's IDS products meet stringent international standards for biodegradability and environmental safety, supporting industries in their transition toward sustainable operations.

Future Outlook

The trajectory for IDS remains robust, driven by increasing regulatory pressure against persistent pollutants and growing demand for green alternatives. Ongoing research explores novel formulations combining IDS with other biodegradable molecules like polyaspartic acid. As circular economy principles gain traction, IDS's biodegradability positions it favorably for applications in closed-loop water systems, sustainable agriculture, and green manufacturing.

With its exceptional balance of performance, safety, and environmental compatibility, IDS exemplifies how green chemistry solves industrial challenges without ecological compromise. As manufacturers like Yuanlianchem advance production technologies, this innovative chelator will continue displacing conventional pollutants across global industries—contributing to cleaner water systems and more sustainable supply chains.