Tetrasodium Glutamate Diacetate Glda Tetrasodium Glda-4na CAS 51981-21-6

• Customization: Available
• CAS No.: 51981-21-6
• Formula: C9h9nna4o8
• Model NO.: 40%
• Type: Synthesis Material Intermediates
• Appearance: Liquid
• Quality: Industrial
• Colour: Colorless
• Specification: 40%
• Trademark: JinYu
• Origin: China

Product Description

Product Description

Basic Information

• Chemical Name: Tetrasodium glutamate diacetate,GLDA Tetrasodium
• CAS Number: 51981-21-6
• Molecular Formula: C9H12NNa4O9
• Molecular Weight: 369.16

Physical and Chemical Properties

1. Appearance:
   • Usually a colorless to light yellow transparent liquid or white powder, highly soluble in water, with an alkaline aqueous solution.
2. pH Value:
   • pH of 1% aqueous solution is approximately 9.5-11.0 (strongly alkaline; stability should be noted when compatible with acidic substances).
3. Chelating Ability:
   • Efficiently chelates metal ions such as calcium, magnesium, iron, and copper to form stable water-soluble complexes, with particularly strong chelating capacity for iron ions (Fe3+).
4. Biodegradability:
   • Degradable by microorganisms into carbon dioxide, water, and amino acids, classified as an environmentally friendly chelating agent compliant with EU REACH regulations and other environmental requirements.

Core Properties and Mechanism

1. Metal Ion Chelation:
   • Forms multiple coordination bonds with metal ions through amino and carboxyl groups in the molecule, reducing metal ion activity to:
     • Inhibit oxidation, discoloration, or precipitation caused by metal ions (e.g., calcium and magnesium ions in hard water reducing detergent efficacy).
     • Remove metal impurities in industrial processes (e.g., iron ions in textile dyeing affecting coloration).
2. System Stability Regulation:
   • Prevents metal ion-catalyzed component deterioration in daily chemical products (e.g., oil oxidation in skin care products); inhibits enzymatic browning in foods (e.g., iron ions accelerating discoloration in fruit cans).
3. Water Softening:
   • Replaces traditional phosphates (e.g., STPP) or EDTA for hard water softening, reducing scale formation, while being phosphorus-free and environmentally friendly.

Main Application Fields
1. Daily Chemicals and Personal Care

• Detergents/Laundry Liquids:
  • As a phosphorus-free builder, replacing sodium tripolyphosphate (STPP), chelating calcium and magnesium ions in water to enhance detergency, especially suitable for low-temperature washing.
  • Typical dosage: ~1%-3% in laundry liquids, ~2%-5% in washing powders.
• Skin Care and Cosmetics:
  • Stabilizes metal ions in formulations to prevent preservatives (e.g., Kathon) from failing or pigment precipitation, commonly used in shampoos, lotions, and creams.
• Oral Care:
  • Chelates calcium ions in toothpaste to inhibit tartar formation and reduce metal ion interference with fluoride.

2. Food and Beverage Industry

• Food Additive (Chelating Agent):
  • Used in canned foods, juices, and dairy products to prevent discoloration, turbidity, or deterioration caused by metal ions (e.g., preventing iron-induced turbidity in beer).
  • EU Number: E 503 (as an acidity regulator and chelating agent); approved as GRAS (Generally Recognized As Safe) by the U.S. FDA.
• Meat Processing:
  • Chelates iron and copper ions to inhibit fat oxidation and color deterioration, extending shelf life.

3. Industrial and Environmental Fields

• Metal Working Fluids:
  • As a water treatment agent, chelates calcium and magnesium ions in cutting fluids and grinding fluids to stabilize formulations and prevent equipment corrosion.
• Textile Dyeing:
  • Removes iron and copper ions in water to avoid dye reactions with metal ions causing color,improving dyeing uniformity.
• Paper Industry:
  • Chelates metal ions in pulp to improve paper strength and bleaching efficiency, reducing chemical consumption.
• Wastewater Treatment:
  • Replaces EDTA for treating heavy metal-containing wastewater, promoting heavy metal ion precipitation through chelation, especially for complexed heavy metals (e.g., nickel, copper).

4. Pharmaceutical and Agricultural Fields

• Pharmaceuticals:
  • Acts as a metal ion stabilizer in injections and oral liquids to prevent drug reactions with metal impurities.
• Agriculture/Fertilizers:
  • As a chelating agent for trace elements (e.g., iron, zinc), used to prepare water-soluble fertilizers, improving crop absorption efficiency, especially in alkaline soils.

Advantages and Safety

1. Environmental Benefits:
   • Biodegradable, phosphorus-free, and nitrogen-free, reducing the risk of water eutrophication, in line with the "green chemistry" trend.
   • Listed as a "biobased" chemical by the EU (e.g., ECOLOGO-certified products).
2. Safety:
   • Low acute toxicity (rat oral LD50 > 2000 mg/kg), non-irritating to skin (per OECD test standards).
   • Suitable for sensitiveproducts (e.g., baby detergents, medical cleansers).
3. Compatibility:
   • Compatible with anionic and nonionic surfactants, stable under high pH (e.g., 10-12).

Comparison with Similar Chelating Agents

Property	GLDA Tetrasodium	EDTA Tetrasodium	STPP (Sodium Tripolyphosphate)
Biodegradability	Readily degradable (≥90%)	Poorly degradable	Phosphorus-containing, causes eutrophication
Toxicity	Low toxicity (LD50 > 2000 mg/kg)	Moderate toxicity	No direct toxicity, high ecological risk
pH Adaptability	Strongly alkaline (pH 9-12)	Broad pH (2-11)	Alkaline (pH 10-12)
Metal Selectivity	Prioritizes Fe3+, Cu2+**	Balanced chelation of multiple metals	Mainly chelates Ca2+, Mg2+**
Application Scenarios	Eco-friendly detergents, food, pharmaceuticals	Industrial cleaning, water treatment	Traditional detergents (gradually being replaced)

Usage Precautions

1. pH Control:
   • Avoid mixing with strong acids (e.g., hydrochloric acid, sulfuric acid), which may cause GLDA free acid to precipitate and affect chelation efficiency.
2. Storage Conditions:
   • Liquid products should be sealed and stored in a cool place, avoiding high temperatures (>40°C) that may cause decomposition; powder products require moisture protection.
3. Incompatibility:
   • May react with strong oxidizers (e.g., sodium hypochlorite), requiring separate addition.
4. Dosage Optimization:
   • Adjust dosage according to metal ion concentration; theoretically, ~1.5-2 mg GLDA tetrasodium is required to chelate 1 mg Ca².

Product Parameters

 

Packaging & Shipping

Liquid products	Drum of 5kg ,10 kg ,25 kg ,50 kg 200 kg ,250 kg . 1000 kg IBC drum. TANK with 20 tons ,25 tons .
Solid products	Bag of 1 kg ,2 kg ,5 kg ,25 kg ,500kg ,1000 kg . Drum of 25 kg and 50 kg.

Packaging can be customized according to customer requirements.

Company Profile

Qingdao Jinyu Chemical Co., LTD,which is located in Qingdao City, China, with registered capital of RMB 10 million, is a dynamic chemical import and export enterprise with customer demand as its own responsibility. The founder has been engaged in the chemical industry for more than 20 years. With professional technical and marketing personnel, diversified cooperative factories with synthetic technology and efficient logistics management, we provide services to customers all over the world. After years of hard work, we have selected a number of excellent chemical production cooperative enterprises in China. These enterprises have their own advantages in different chemical synthesis fields. They have passed the strict inspection of suppliers by many customers and formed a long-term and stable strategic partnership with customers. With our partners' excellent equipment, well-trained employees and mature technology, we also continue to provide customers with more products.

Our Advantages