Trisodium (2-hydroxyethyl)ethylenediaminetriacetate CAS 139-89-9, Trisodium 2-hydroxyethyl ethylenediaminetriacetate, CAS 139-89-9
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Chemical name: (2-hydroxyethyl) Trisodium ethylenediaminetriacetate (Alternative names: Trisodium salt of hydroxyethyl ethylenediaminetriacetate, HEDTA-3Na)
139-89-9
C10H15N2Na3O7
344.2
205-381-9
| CAS | 139-89-9 |
| Molecular formula | C10H15N2Na3O7 |
| Molecular weight | 344.2 |
| EIENCS | 205-381-9 |
| Form | / |
| Melting point | / |
| boling point | / |
| Density | / |
| Solubility | Dissolves slowly in water to form a viscous solution; insoluble in ethanol and in ether. |
| PKA | / |
| Color | White to yellow powder |
| Storage temp |
Chemical name: (2-hydroxyethyl) Trisodium ethylenediaminetriacetate (Alternative names: Trisodium salt of hydroxyethyl ethylenediaminetriacetate, HEDTA-3Na)
Molecular formula: C₁₀H₁₅N₂O₇Na₃
Molecular weight: 344.20 g/mol
CAS Number: 139-89-9
EINECS number: 205-381-9
Appearance: White to light yellow crystalline powder (may turn slightly yellow after long-term storage or exposure to light)
Solubility: Readily soluble in water (480 g/L, 20℃), insoluble in aliphatic hydrocarbon solvents
Metal ion chelating agent (main application)
Industrial cleaning: It efficiently chelates metal ions such as calcium, magnesium, iron and copper within the pH range of 1 to 12, and is used for boiler scale removal and electroplating solution purification.
Textile printing and dyeing: Enhance the adhesion of dyes, improve the uniformity of dyeing and color fastness, and the cost is 30% lower than that of traditional auxiliaries.
Agriculture and Environmental Protection
Iron fertilizer enhancer: Chelates iron ions (HEDTA-Fe) in alkaline soil to increase the absorption rate of iron by crops.
Rare earth purification: It has outstanding chelating ability for rare earth metals (such as cerium and lanthanum) and is used in rare earth smelting and separation.
Medicine and daily chemicals
Antidote: Treats heavy metal poisoning (such as excessive iron) and excretes it from the body through chelation.
Cosmetic stabilizers: Prevent catalytic oxidation of metal ions in the formula and extend the shelf life of skin care products.
Emerging fields
New energy materials: Used as an additive for lithium-ion battery electrolyte to enhance electrode stability.
Electroless silver plating: An alternative to cyanide plating solution, reducing the risk of environmental pollution.
Health risk:
Low toxicity: Oral LD₅₀ in rats =2620 mg/kg, which is actually non-toxic.
Irritation: Contact with eyes or skin may cause inflammation (protective gloves should be worn during operation).
Storage requirements:
Cool and dry (≤25℃), away from light and sealed, with a relative humidity of less than 75%.
Environmental protection compliance
REACH certification is required for exports to the European Union. Food grade must comply with FDA 21CFR172.615 and GB 10287 standards.
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