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Sodium Salt of Iminodisuccinic Acid (IDS) is a sodium salt of iminodisuccinic acid, also referred to as N-(1,2-dicarboxyethyl)aspartic acid.
Sodium Salt of Iminodisuccinic Acid (IDS), also named IDS-Na4, is an eco-friendly phosphorus-free chelating agent, used to replace the traditional chelating agent HEDP, EDTA, DTPA, NTA, etc.
Sodium Salt of Iminodisuccinic Acid (IDS) is a powerful chelating agent used in various applications including cleaning and personal care products.
CAS Sentences: 144538-83-0
Molecular Formula: C8H12NNaO8
Molecular Weight: 273.17
Synonyms: 144538-83-0, Tetrasodium iminodisuccinate, Aspartic acid, N-(1,2-dicarboxyethyl)-, sodium salt (1:4), GYS41J2635, tetrasodium;2-(1,2-dicarboxylatoethylamino)butanedioate, Aspartic acid, N-(1,2-dicarboxyethyl)-, tetrasodium salt, BAYPURE CX100, BORCHIGEN 630, BAYPURE CX-100, Iminodisuccinic acid sodium salt, Iminodisuccinic acid tetrasodium salt, Iminodisuccinic acid tetrasodium salt [MI], Tetrasodium N-(1,2-dicarboxyethyl)aspartate, N-(1,2-dicarboxyethyl)aspartic acid tetrasodium, RefChem:897523, Tetrasodium iminodisuccinate [INCI], 604-420-0, UNII-GYS41J2635, Tetrasodium iminodisuccinate (34% aqueous solution), MFCD07779322, C8H7NNa4O8, SCHEMBL197380, DTXSID1051723, Imino disuccinic acid sodium salt, Sodium 2,2'-azanediyldisuccinate, GYBINGQBXROMRS-UHFFFAOYSA-J, UFA53883, Iminodisuccinic acid tetrasodium (IDS), NS00113658, F87817, Iminodisuccinic acid tetrasodium salt (IDS-Na4), Aspartic acid, N-(1,2-dicarboxyethyl)-, sodium salt (1:4), 302337-36-6, Aspartic acid, N-(1,2-dicarboxyethyl)-, sodium salt (1:4);JACS-144538-83-0;TETRASODIUM IMINIDISUCCINATE;Aspartic acid, N-(1,2-dicarboxyethyl)-, tetrasodium salt;Iminodibernsteinsure, Natriumsalz;N-(1,2-Dicarboxyethyl)-DL-aspartic acid, tetrasodium salt;Borchigen 630;N-(1,2-Dicarboxyethyl)aspartic acid tetrasodium salt
Sodium Salt of Iminodisuccinic Acid (IDS) is also can be used as water treatment agent, scale inhibitor and water softener in traditional industrial circulation field.
Sodium Salt of Iminodisuccinic Acid (IDS) is a biodegradable chelating agent that is derived from aspartic acid, a naturally occurring amino acid, and it is typically produced through environmentally friendly synthetic processes that do not rely on petrochemical feedstocks.
Sodium Salt of Iminodisuccinic Acid (IDS) is a polycarboxylic acid salt with the formula C₈H₇NNa₄O₈, and its molecular structure allows it to bind strongly with metal ions such as calcium, magnesium, iron, and copper, forming stable, water-soluble complexes.
This chelating property makes it an effective substitute for traditional chelating agents such as ethylenediaminetetraacetic acid (EDTA) or nitrilotriacetic acid (NTA), which are less biodegradable and can persist in the environment.
In appearance, sodium salt of Sodium Salt of Iminodisuccinic Acid (IDS) usually comes as a white to off-white crystalline solid or in aqueous solution, and it is highly soluble in water, producing a stable solution that works efficiently across a wide pH range.
One of its most attractive features is that it combines high chelating efficiency with excellent biodegradability, meaning it can be broken down naturally by microorganisms in wastewater treatment systems without leaving harmful residues, which reduces its environmental footprint compared to older, synthetic complexing agents.
Sodium Salt of Iminodisuccinic Acid (IDS) has found wide acceptance in detergent and cleaning formulations, where it binds with calcium and magnesium ions in hard water, preventing them from interfering with surfactants and thereby enhancing cleaning performance.
In addition, its ability to stabilize metal ions also makes it valuable in industrial and institutional cleaning products, cosmetics, personal care formulations, textiles, and water treatment systems, where it helps to prevent scaling, control metal-catalyzed degradation, and maintain the stability and effectiveness of active ingredients.
Sodium Salt of Iminodisuccinic Acid (IDS) is considered a next-generation, eco-friendly chelating agent that combines performance comparable to traditional complexing agents with the major advantage of rapid biodegradability, making it a preferred choice in industries that are seeking safer and more sustainable chemical solutions.
Sodium Salt of Iminodisuccinic Acid (IDS) is particularly noteworthy because it represents a new generation of environmentally friendly chelating agents, developed as a sustainable alternative to older, less biodegradable chelants.
Sodium Salt of Iminodisuccinic Acid (IDS), which can remain in the environment for extended periods and accumulate in water systems, IDS is classified as readily biodegradable, meaning it breaks down quickly and completely under standard wastewater treatment conditions.
This makes it very attractive to industries that face regulatory and consumer pressures to reduce the ecological footprint of their products.
Melting point: >300°
EWG's Food Scores: 1
FDA UNII: GYS41J2635
Sodium Salt of Iminodisuccinic Acid (IDS) can be prepared by reacting maleic anhydride with ammonia and sodium hydroxide.
For the synthesis of tetrasodium iminodisuccinate, maleic anhydride is reacted with sodium hydroxide in water at elevated temperature.
A concentrated disodium maleate solution is formed to which ammonia is added at 90 to 145 °C, then excess water and ammonia is distilled off.
An aqueous solution containing about 34% tetrasodium iminodisuccinate is obtained with yields of up to 98%.
Spray-drying can be used to obtain a mixture of solids consisting of> 65% tetrasodium iminodisuccinate salts (essentially the tetra sodium salts), <2% maleic acid sodium salts, <8% fumaric acid sodium salts, <2% malic acid sodium salts, <15% aspartic acid sodium salts, and >15% water.
The by-products of the reaction do not affect the complexing capacity or biodegradability of the tetrasodium iminodisuccinate.
Tetrasodium iminodisuccinate, Sodium Salt of Iminodisuccinic Acid (IDS) can increase the vividness of colors.
Sodium Salt of Iminodisuccinic Acid (IDS) can be used in soap formulations, which has stronger detergency than soap without Sodium Salt of Iminodisuccinic Acid (IDS), because the adding of IDS can effectively shield metal ions’ effect on detergent washing performance; added to dishwashing detergent, the precipitation on surface of stainless steel is very less, and effect of second washing is higher.
As a commercial product, Sodium Salt of Iminodisuccinic Acid (IDS) is sold either as a white powder (solid mixture, produced by spray drying of the aqueous solution, Baypure CX 100) or as granular material with a content of> 78% tetrasodium iminodisuccinate.
Sodium Salt of Iminodisuccinic Acid (IDS) is a chelating agent, forming complexes of moderate stability (10−16), which includes (as a pentadentate ligand) alkaline earth and polyvalent heavy metal ions with one molecule of water in an octahedral structure.
In 0.25% aqueous solution, a pH of 11.5 results for tetrasodium iminodisuccinate.
The salt is stable for several hours in weakly acidic solution (pH> 4-7) even at 100 °C and for weeks in strongly alkaline solutions even at an elevated temperature (50 °C).
Sodium Salt of Iminodisuccinic Acid (IDS) is classified as readily biodegradable according to OECD methods (OECD 302 B, 100% after 28 days and OECD 301 E, 78% after 28 days).
As biodegradable alternatives from the class of widespread chelating agents, only nitrilotriacetic acid (NTA) is sufficiently biodegradable under certain conditions (which is suspected of being carcinogenic, though) and the chelating active amino acid derivatives β-alaninediacetic acid and methylglycine diacetic acid (Trilon M®).
From a chemical standpoint, Sodium Salt of Iminodisuccinic Acid (IDS) functions by binding and stabilizing divalent and trivalent metal ions such as calcium (Ca²⁺), magnesium (Mg²⁺), iron (Fe³⁺), copper (Cu²⁺), and manganese (Mn²⁺).
These ions often cause problems such as scaling, precipitation, discoloration, or catalytic degradation of formulations.
By forming soluble complexes with these ions, Sodium Salt of Iminodisuccinic Acid (IDS) prevents them from interfering with cleaning agents, cosmetics, or industrial processes.
What makes Sodium Salt of Iminodisuccinic Acid (IDS) particularly valuable is that it performs this task across a wide range of pH levels (acidic to alkaline conditions) and remains stable under high temperatures, which broadens the scope of its applications.
One of the most significant areas where sodium iminodisuccinate is used is in the detergent and cleaning industry.
Sodium Salt of Iminodisuccinic Acid (IDS) serves as a water-softening agent in laundry detergents, dishwashing powders, and household cleaning products, where it replaces phosphates (which are banned in many regions due to eutrophication concerns) and EDTA (restricted for environmental reasons).
By binding hard-water ions,
Sodium Salt of Iminodisuccinic Acid (IDS) ensures that surfactants can work efficiently, which improves stain removal, prevents re-deposition of soils on fabrics, and enhances the overall cleaning performance.
Its eco-friendly profile also allows manufacturers to market cleaning products as “green” or “sustainable,” which is increasingly important to consumers.
In cosmetics and personal care products, Sodium Salt of Iminodisuccinic Acid (IDS) is used to stabilize formulations that contain metal-sensitive ingredients, such as antioxidants, fragrances, or colorants.
By chelating trace metal ions that may be introduced through raw materials or packaging, Sodium Salt of Iminodisuccinic Acid (IDS) prevents premature oxidation, discoloration, or spoilage, thereby extending shelf life and improving product safety.
Sodium Salt of Iminodisuccinic Acid (IDS) is frequently found in shampoos, body washes, creams, and lotions where mild but effective stabilization is needed without the risks associated with harsher synthetic chelants.
The water treatment industry also benefits greatly from IDS, since it can prevent scaling and corrosion in cooling towers, boilers, and other systems that rely on circulating water.
By sequestering calcium and magnesium, Sodium Salt of Iminodisuccinic Acid (IDS) helps maintain the efficiency of heat exchangers and pipes, while its biodegradability ensures that discharged water does not harm aquatic ecosystems.
Similarly, in the textile and paper industries, Sodium Salt of Iminodisuccinic Acid (IDS) is applied during bleaching and dyeing processes to control metal ions that can interfere with dyes, bleach activators, and process stability, which leads to brighter colors, improved fabric quality, and more consistent product results.
Uses Of Sodium Salt of Iminodisuccinic Acid (IDS):
Biodegradable metal chelator in detergents, cleaners and personal care products; in photographic applications; in trace nutrient agricultural fertilizers.
In manufacture of textiles and newspaper.
Scale deposit remover, water softener, bleaching agent stabilizer.
Sodium Salt of Iminodisuccinic Acid (IDS) has been distributed by Lanxess since 1998 under the trade name Baypure CX 100 as complexing agent.
Sodium Salt of Iminodisuccinic Acid (IDS) reacts with the calcium and magnesium ions in water and forms chelate complexes of medium stability.
This complexation prevents the formation of insoluble salts (deposits) and soaps (lime soaps) and thus improves the effect of detergents and dishwashing detergents, hand soaps and shampoos.
As a result, the amount of conventional builders in solid detergents (carbonates, silicates, phosphates, citrates, zeolites) can be reduced or fully replaced.
The calcium binding capacity for tetrasodium iminodisuccinate is approximately 230 mg CaCO3/g salt and therefore lies between the capacity of DTPA Na5 salt (210 mg CaCO3 Na salt) and EDTA Na4 salt (280 mg CaCO3/g Na-salt).
Also most other applications of tetrasodium iminodisuccinate Na salt are based on the complexation of alkaline earth and heavy metal ions e. g. in industrial cleaners for the removal of biofilms and limescale, cosmetics, in electroplating, in construction (retardation), textile (protection against graying) and paper.
When Sodium Salt of Iminodisuccinic Acid (IDS) is used in solid detergent formulations instead of the common phosphonates, it inhibits the heavy metal ion catalyzed decomposition of hydrogen peroxide in bleach-containing wash liquors.
Complexes of tetrasodium iminodisuccinate with Fe3+, Cu2+, Zn2+ and Mn2+ ions are used as micronutrients, as they are providing important trace elements for plants in readily absorbable form; both granulated as soil fertilizer and dissolved as foliar spray.
The so far commonly in plant protection applied complexing agents such as EDTA, DTPA (diethylenetriamine pentaacetic acid), EDDHA (ethylenediamine dihydroxyphenylacetic acid) or HBED (N,N'-di(2-hydroxybenzyl)ethylenediamine-N, N'-diacetic acid) are difficult to virtually non-biodegradable.
In contrast, Sodium Salt of Iminodisuccinic Acid (IDS) trace element complexes offer an interesting alternative.
As a chelating agent, Sodium Salt of Iminodisuccinic Acid (IDS) is used as a cleaning agent for alkaline earth metals and heavy metal ions.
Sodium Salt of Iminodisuccinic Acid (IDS) is widely used in industrial cleaning agents, detergents, textile printing and dyeing auxiliaries, pulp and paper industry, hydrogen peroxide stabilizers, electronic chemicals, copper complexing agents, and ceramic industries, electroplating industry, cleaning agent for photography industry, extraction of soil heavy metal pollutants, soil trace element fertilizer chelating agent, etc.
Sodium Salt of Iminodisuccinic Acid (IDS), as a green chelating complexing agent, has a good effect on complexing iron ions, and can be used in the formula of complexing iron desulfurization technology.
In the process of complex iron desulfurization, ferric iron ion Fe3+(L) directly oxidized HS-(L) to sulfur.
Complex iron desulfurization technology is a kind of desulfurization technology with complex iron as catalyst, is a method of wet oxidation to remove hydrogen sulfide, which is characterized by the gas phase hydrogen sulfide H2S into the liquid phase is directly oxidized to elemental sulfur S. Complex iron process is a new desulfurization technology with simple technology, high working sulfur capacity, environmental protection and non-toxic.
Sodium Salt of Iminodisuccinic Acid (IDS) overcomes the disadvantages of traditional desulfurization process, such as low sulfur capacity, complex desulfurization process, high byproduct and serious environmental pollution.
The sulfur recovery rate can reach 99.99% by sulfur tail exhaust recovery device.
Sodium Salt of Iminodisuccinic Acid (IDS) can be used for hydrogen peroxide bleaching in various processes, and has obvious synergistic and stabilizing effects, especially in high-temperature alkaline environments has excellent performance.
Sodium Salt of Iminodisuccinic Acid (IDS) can complex with copper ions, iron ions, etc. which are decomposed by bleaching agents.
In addition, the whiteness of the obtained product is much better than that of using traditional stabilizers.
When mixed with sodium silicate, it can reduce the formation of silica scale.
Sodium Salt of Iminodisuccinic Acid (IDS) used together with surfactants, can achieve very good results.
Use in neutral cleaning agent, can remove rust and iron sulfide scale in metal pipeline network, especially recommended for natural gas pipeline cleaning.
Sodium Salt of Iminodisuccinic Acid (IDS) as a degradable complexing agent, can used in daily chemicals to complex metal ions, prevent or eliminate the turbidity of liquid daily chemical products, and maintain its clear and transparent state.
Enhance the decontamination ability of product, increase the solubility of calcium-like ions, and enable the surfactant to function normally.
The sodium salt of Sodium Salt of Iminodisuccinic Acid (IDS) is widely used in the detergent and cleaning industry, where it plays an essential role as an eco-friendly chelating agent that can effectively bind calcium and magnesium ions, which are the main contributors to water hardness.
By sequestering these ions, IDS prevents them from interfering with surfactants, thereby allowing soaps and detergents to lather properly, remove soils more efficiently, and leave behind cleaner surfaces without streaks or residues.
Sodium Salt of Iminodisuccinic Acid (IDS)s use in laundry detergents, dishwashing formulations, and household cleaning products has increased substantially in recent years because it can replace traditional chelating agents like phosphates and EDTA, which are either environmentally damaging or poorly biodegradable.
Sodium Salt of Iminodisuccinic Acid (IDS) is added to shampoos, conditioners, body washes, and creams to stabilize formulations that are sensitive to trace amounts of metal contaminants.
Metal ions such as iron, copper, or manganese can catalyze the breakdown of active ingredients, fragrances, or preservatives, leading to discoloration, off-odors, or reduced shelf life.
Sodium Salt of Iminodisuccinic Acid (IDS) binds these ions effectively, which not only prevents product degradation but also ensures that the texture, appearance, and performance of cosmetic products remain consistent over time, without posing risks to the skin or the environment.
Sodium Salt of Iminodisuccinic Acid (IDS) also finds important applications in water treatment systems, where it helps to prevent scaling, corrosion, and deposits in equipment such as boilers, cooling towers, and heat exchangers. Because IDS is stable over a broad pH range and maintains its chelating ability at elevated temperatures, it is suitable for use in demanding industrial environments.
At the same time, its readily biodegradable nature makes it a safer alternative compared to conventional agents, as it reduces the environmental impact of discharged water and complies with increasingly strict wastewater regulations.
In the textile and paper industries, Sodium Salt of Iminodisuccinic Acid (IDS) is employed during bleaching, dyeing, and finishing processes to control metal ions that might otherwise interfere with dyes and bleaching agents.
By binding ions such as iron or copper, Sodium Salt of Iminodisuccinic Acid (IDS) ensures that bleaching reactions proceed evenly and that dyes produce brighter, more consistent colors.
This leads to improved fabric quality, greater process reliability, and reduced chemical waste, which aligns with the industry's move toward greener and more sustainable practices.
Safety Profile Of Sodium Salt of Iminodisuccinic Acid (IDS):
The sodium salt of Sodium Salt of Iminodisuccinic Acid (IDS) is generally regarded as a low-hazard chemical, especially compared with traditional chelating agents such as EDTA or NTA, which are more persistent and can present greater risks to health and the environment.
However, like most industrial chemicals, it is not completely free from hazards, and safe handling practices are still essential.
From a human health perspective, exposure to the dry powder or concentrated solutions of Sodium Salt of Iminodisuccinic Acid (IDS) can cause mild to moderate irritation to the skin, eyes, and respiratory tract.
If the powder becomes airborne, inhalation of dust may lead to coughing, throat irritation, or discomfort in the nasal passages, particularly in individuals who are sensitive to dust.
Direct skin contact may result in dryness, redness, or mild itching, while accidental splashes in the eyes can cause burning sensations, redness, and watering, though these effects are typically reversible with prompt rinsing.
Ingesting large amounts of IDS is not expected in normal use, but if swallowed accidentally, it may cause gastrointestinal upset such as nausea, stomach pain, or diarrhea.
