Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Basic Information
- Product Name: Disodium edetate dihydrate
- CAS Number: 6381-92-6
- Molecular Formula: C??H??N?Na?O?·2H?O
- Molecular Weight: 372.24 g/mol
- Synonyms: Disodium ethylenediaminetetraacetate dihydrate; EDTA disodium salt dihydrate; EDTA-Na?·2H?O; Edetate disodium dihydrate; Sequestrene Na?
- Classification: Chelating agent, biochemical reagent, food additive, pharmaceutical auxiliary, industrial additive, molecular biology grade reagent
Physical & Chemical Properties
- Appearance: White crystalline powder; odorless, tasteless, uniform in texture, no visible impurities, easy to absorb moisture when exposed to air.
- Melting Point: 248°C (decomposes); decomposes when reaching melting point, no stable melting range.
- Boiling Point: Decomposes before boiling; no fixed boiling point, decomposes at high temperature.
- Density: 1.01 g/cm3 (20°C); stable under normal temperature and pressure, easy to measure.
- Refractive Index: Not applicable; solid crystalline powder at room temperature, no refractive index parameter.
- Flash Point: Not flammable; no flash point, does not burn under conventional use conditions.
- Solubility: Soluble in water (100 g/L at 20°C), solubility increases with the rise of pH value; slightly soluble in ethanol; insoluble in ether, chloroform and other organic solvents; soluble in 3M sodium hydroxide solution (1.6 g/10 ml).
- Stability: Stable under normal temperature and pressure; hygroscopic; stable in aqueous solution, can be autoclaved; stable for months at 4°C when prepared into 0.5M stock solution (pH 8.5); avoid long-term exposure to humid environment to prevent moisture absorption and caking.
- Key Parameters: Purity 99.0-101.0% (Titration); pH 4.0-6.0 (25°C, 5% aqueous solution); Heavy Metals ≤0.005% (ICP-OES); Insoluble Matter ≤0.005%; Nitrilotriacetic Acid (NTA) ≤0.1%; Fe ≤0.005%, Pb ≤0.002%.
Uses
Disodium edetate dihydrate (CAS 6381-92-6) is a highly efficient and versatile chelating agent, which can form stable octahedral complexes with various metal ions (such as Ca2?, Mg2?, Fe3?, Cu2?, Zn2?), and is widely used in molecular biology, medicine, food, industry and other fields. In molecular biology and biochemistry, it is used as a metal protease inhibitor (effective concentration 1-10 μM), which can chelate metal ions in the active site of metalloproteases to inhibit the activity of DNase, RNase and other metal-dependent enzymes, maintaining the stability and integrity of biological samples; it is also used in electrophoresis buffers, cell digestion, sample depolymerization and cell culture media to chelate metal ions and prevent cell toxicity. In medicine, it is used as an anticoagulant (common concentration 1.5 mg/mL blood) to chelate calcium ions in blood and prevent blood coagulation; it is also used as an auxiliary reagent for the treatment of heavy metal poisoning, helping to promote the excretion of heavy metals from the body. In the food industry, it is used as a natural preservative, antioxidant and color protectant, which can prevent food discoloration, deterioration and oxidation, extend the shelf life of food, and is widely added to canned food, condiments, beverages, meat products and edible oils. In industry, it is used in water treatment to remove metal ions in water; it is used in textile dyeing, electroplating, papermaking and leather processing to prevent metal precipitation and regulate reaction speed; it is also used in detergents and cleaning agents to enhance cleaning effect.
Packaging & Storage
Packaging: Laboratory grade: 10g, 50g, 100g, 500g sealed plastic bottles or brown glass bottles to prevent moisture absorption; industrial grade: 1kg, 5kg, 25kg HDPE drums or aluminum foil bags with inner PE liners, labeled with product name, CAS number, batch number, manufacturing date, expiry date, purity and storage precautions. Storage: Store at room temperature (15-30°C) in a cool, dry, well-ventilated warehouse; keep tightly sealed to prevent moisture absorption, caking and contamination; avoid humid environment and direct sunlight; do not mix with toxic, harmful and oxidizing substances. Shelf life: 24 months under recommended sealed storage conditions; use as soon as possible after opening to avoid moisture absorption and performance degradation. Transportation: Avoid transportation under rain, humidity and high temperature; prevent collision and damage to packaging; do not transport together with incompatible substances; no special low-temperature transportation is required, and normal temperature transportation is acceptable. Handling: Operate in a well-ventilated area; avoid inhalation of powder and contact with skin, eyes and mucous membranes; wear dust-proof gloves, goggles and protective clothing during operation; wash skin thoroughly with soap and water after contact; if splashed into eyes, rinse with plenty of flowing water for 10-15 minutes and seek medical help in time; if swallowed, call a poison center or doctor immediately.
