Tetrasodium Glutamate Diacetate（GLDA-Na₄）

Against the backdrop of increasingly stringent global environmental regulations and the indust

Details

I. Core Product Overview

Tetrasodium Glutamate Diacetate (GLDA-Na₄), CAS No. 51981-21-6, chemical name Tetrasodium N,N-bis(carboxymethyl)-L-glutamate, molecular formula C₉H₉NO₈Na₄, and molecular weight of approximately 345.15g/mol, is a small-molecule organic chelating agent synthesized by modifying natural L-glutamic acid. Its core raw material, glutamic acid, has been safely used as a food additive for more than a hundred years, laying a safe and environmentally friendly foundation for the product from the source.

The product appearance is divided into two formulations: pale yellow to yellow transparent liquid, and off-white granules or powder. It is odorless, non-irritating, easily soluble in water, with an aqueous solution showing weak alkalinity, free of harmful impurities, and suitable for various liquid and solid formulation systems. Different from traditional petroleum-derived chelating agents, GLDA-Na₄ is derived from renewable plant raw materials such as molasses and starch, with a lower carbon footprint. After use, it can be quickly decomposed by microorganisms in the natural environment, fully complying with EU REACH, China's detergent environmental standards, and relevant OECD specifications. It is a truly "naturally derived and naturally degradable" green functional raw material, and also an ideal alternative to traditional chelating agents such as EDTA and NTA.

II. Core Performance Advantages

1. High-Efficiency Chelation, Suitable for Multiple Working Conditions

GLDA-Na₄ contains multiple coordinating atoms (nitrogen and oxygen atoms) in its molecule, which can form stable complexes with various metal ions such as calcium (Ca²⁺), magnesium (Mg²⁺), iron (Fe²⁺/Fe³⁺), copper (Cu²⁺), and zinc (Zn²⁺). It has a high chelation stability constant, and its chelating ability is far superior to that of natural chelating agents such as sodium citrate. Its chelating capacity for calcium ions can reach 450mg/g, which is much better than that of traditional chelating agents. Even at low concentrations (1g/L solution), it can quickly soften hard water, remove calcium scale, effectively prevent scale formation and dirt redeposition, significantly improve the core efficiency of downstream products, and adapt to formulation needs of different concentrations and working conditions.

2. Green Degradation, Outstanding Environmental Advantages

As a benchmark product of environmental chelating agents, GLDA-Na₄ has industry-leading biodegradability. According to OECD 301 series test standards, its 28-day biodegradation rate usually exceeds 80%, and can be as high as more than 98% under suitable working conditions, far superior to EDTA (degradation rate of only about 6%). After use, it can be completely decomposed into water, carbon dioxide, and trace sodium salts, without persistent residues, will not accumulate in water or soil, and will not re-release heavy metals to cause secondary pollution. At the same time, the product is phosphorus-free, avoiding water eutrophication from the source, perfectly complying with the global "phosphorus ban" trend, with extremely low toxicity to aquatic organisms and excellent environmental compatibility.

3. Strong Stability, Suitable for Extreme Scenarios

The product has excellent acid-base tolerance and high-temperature resistance. It can stably exert chelating performance in a wide pH range of 2-13.5. Whether in strong acid cleaning systems or high-alkaline detergent formulations, it will not precipitate or fail. At the same time, it can withstand high temperatures of 170℃. Under harsh working conditions such as high-temperature washing and boiler cleaning, it can still maintain structural stability and unattenuated chelating ability after long-term testing, adapting to more complex industrial and daily chemical scenarios, and its practicality is far superior to traditional chelating agents.

4. Good Compatibility, Convenient Formulation Integration

GLDA-Na₄ has excellent compatibility with anionic, non-ionic, and cationic surfactants, as well as common raw materials such as bleaches, enzymes, and fungicides. It does not undergo chemical reactions or affect the activity of each component when mixed, and can also produce a synergistic effect with fungicides, saving 20%-80% of the fungicide dosage. Its high solubility can avoid precipitation and crystallization problems in the formulation, and it can be easily integrated into various product formulations without adjusting existing production processes, simplifying the formulation optimization process for downstream enterprises and reducing production costs.

5. Safe and Low-Toxic, Wide Application Scenarios

The product has no GHS hazard classification, is non-flammable, non-corrosive, and non-acutely toxic. The acute oral toxicity LD50＞5000mg/kg, which is an actually non-toxic substance. It has extremely low irritation to the skin and eyes, complies with relevant standards for food contact cleaning agents and cosmetic raw materials, and has been included in the "Catalogue of Used Cosmetic Raw Materials (2021 Edition)". It can be safely used in scenarios that come into contact with the human body, suitable for sensitive skin and baby-specific product formulations, and its use safety is far superior to traditional chelating agents.

III. Main Technical Indicators

Item	Liquid Formulation (Type Ⅰ)	Liquid Formulation (Type Ⅱ)	Solid Formulation
Appearance	Pale yellow to yellow transparent liquid	Pale yellow to yellow transparent liquid	Off-white granules or powder
Active Content	≥38.0%	≥47.0%	≥75.0%
pH Value (1% Aqueous Solution)	11.0-12.0	11.0-12.0	11.0-12.0
Density (20℃)	≥1.30g/cm³	≥1.40g/cm³	—
Chloride (as Cl⁻)	≤3.0%	≤1.7%	—
Loss on Drying	—	—	≤8.0%
Biodegradation Rate (28 days)	≥80%	≥80%	≥80%

IV. Multi-Field Application Scenarios

1. Daily Chemical Detergent Field (Core Application)

As a core additive for phosphorus-free detergents, GLDA-Na₄ is widely used in laundry detergent, laundry powder, automatic dishwasher detergent, hard surface cleaner and other products. In laundry detergent, it can soften hard water, prevent calcium soap deposition, avoid clothes turning gray and hard, improve decontamination power, reduce the dosage of surfactants, adapt to low-temperature washing processes, and can be used for sensitive skin and baby-specific laundry detergent; In automatic dishwasher detergent, it can strongly chelate hard water ions, prevent scaling and water spots on tableware and the inner wall of the machine, keep tableware bright and clean, and has little residue concern; In hard surface cleaners, it can effectively dissolve soap scum, water stains and metal ion stains, suitable for cleaning kitchens, bathrooms, glass and other scenarios, leaving surfaces as clean as new.

2. Personal Care Field

With its mild and low-irritating characteristics, GLDA-Na₄ has become an "invisible guardian" for high-end cosmetic formulations, widely used in shampoo, body wash, essence, facial cream, sunscreen and other products. In hair and body care products, it can chelate hard water ions, improve cleaning effect and foam quality, reduce soap scum residue on the skin and hair, making the skin feel fresher and the hair softer; In skin care products and sunscreens, it can stabilize the formulation, prevent active ingredient inactivation and product discoloration and odor caused by metal ions, extend product shelf life, adapt to the "clean beauty" trend, and the recommended addition amount ranges from 0.05% to 0.5%.

3. Industrial Cleaning Field

It is suitable for various industrial cleaning scenarios, especially fields with high environmental requirements. In metal cleaning and surface treatment, it can chelate metal ions, remove metal scale and oxide layers, ensure the cleanliness of pre-plating and pre-coating treatment, and improve processing quality; In food processing equipment cleaning, it can efficiently dissolve residues such as calcium phosphate scale, with no residue and no pollution, complying with food safety standards; In boiler and heat exchanger cleaning, it can inhibit the scaling of calcium carbonate and calcium sulfate, improve equipment thermal efficiency, and reduce energy consumption; In electronic component (such as PCB board) cleaning, it can gently remove stains and protect components from damage.

4. Agricultural Field

As an environmentally friendly agrochemical additive, GLDA-Na₄ can be used as a fertilizer additive and trace element chelating agent, converting essential trace elements for plants such as iron, zinc, manganese, and copper into easily absorbable chelated forms, improving fertilizer utilization rate, enhancing crop nutrition, and promoting crop growth. At the same time, it can be used as a scale inhibitor in agricultural irrigation systems to prevent scaling of pipelines and equipment, extend equipment service life, and will not pollute the soil and crops.

5. Other Fields

In the water treatment field, it can be used as an environmentally friendly scale inhibitor and dispersant to soften water quality, inhibit pipeline scaling (scale inhibition rate up to 95% or more), remove heavy metal ions in water, and improve water quality; In the textile printing and dyeing field, it can be used as an oxygen bleaching stabilizer to prevent heavy metal ions from catalyzing the decomposition of bleaching agents, and improve dyeing uniformity and color fastness; In the pulp and paper field, it can control metal ions in production water, prevent scaling and interference with the bleaching process, and improve paper quality.

V. Safe Operation and Storage Specifications

1. Safe Operation

The product is alkaline. Wear protective gloves and goggles during operation to avoid direct contact with skin and eyes; If it accidentally comes into contact with eyes, rinse immediately with plenty of flowing water for no less than 15 minutes, and seek medical attention if necessary; If ingested by mistake, rinse mouth in time and seek medical attention, do not induce vomiting; Keep the operation site well-ventilated to avoid dust inhalation (solid formulation), and there is no obvious safety risk under normal operation.

2. Storage Requirements

Seal and store in a cool, dry and ventilated warehouse, away from fire, heat sources and strong oxidants; The liquid formulation should be protected from freezing to avoid performance impact due to low-temperature freezing; The solid formulation should be prevented from moisture absorption and caking, stacked away from the ground and walls, and not mixed with acidic substances; The packaging adopts plastic barrels (liquid, 250kg/barrel) or plastic woven bags (solid, 25kg/bag), which can be customized on demand. The shelf life is usually 10-12 months. Expired products should be properly disposed of in accordance with environmental standards and shall not be discarded at will.

VI. Summary of Product Advantages

Tetrasodium Glutamate Diacetate (GLDA-Na₄) takes "natural origin, high-efficiency chelation, green degradation, stable compatibility, safety and low toxicity" as its core competitiveness, perfectly solving the environmental pollution pain points and performance limitations of traditional chelating agents, and achieving a dual breakthrough in "environmental upgrading" and "efficiency improvement". Its rich formulation options, wide pH adaptability and multi-field application scenarios make it a core supporting raw material for the green transformation of daily chemicals, industry, agriculture and other industries.

Whether it is daily chemical enterprises creating phosphorus-free and environmentally friendly washing and skin care products, industrial enterprises optimizing cleaning processes and reducing environmental costs, or agricultural fields improving fertilizer utilization rate, GLDA-Na₄ can provide suitable solutions. With the continuous improvement of global environmental awareness and the continuous improvement of relevant regulations, GLDA-Na₄, as a new generation of green chelating agents, has broad prospects for market application, helping various industries develop steadily in a green, efficient and sustainable direction.

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