Product name: Nitrilotriacetic Acid (NTA)
CAS No.: 139-13-9
EC No.: 205-355-7Synonyms: Triglycine, Complexon I, NTA Acid
Molecular Formula: C6H9NO6
Molecular Weight: 191.14
SMILES: OC(=O)CN(CC(O)=O)CC(O)=O
Typical Physical & Chemical Properties
Melting Point 245 ℃ (decomposition)
Solubility Slightly soluble in cold water; soluble in alkaline aqueous solution; insoluble in ethanol, acetone and ether
pH (saturated suspension) ~2.0–2.8
Odor Odorless
Stability Stable under normal ambient conditions. Avoid strong oxidants, strong alkali and high temperature over 200 ℃.
Product Characteristics
A versatile aminopolycarboxylic acid chelating agent with three carboxylic acid groups.
Powerful complexing capacity for divalent & trivalent metal ions (Ca, Mg, Fe, Cu, Zn, Mn).
Forms stable water-soluble metal chelates under wide pH range; excellent anti-scaling and metal ion shielding performance.Biodegradable compared with EDTA, widely accepted for industrial water treatment and cleaning formulations.
Quality Specifications (Industrial Grade)
| Item | Specification | Test Method |
|---|---|---|
| Appearance | White crystalline powder | Visual Inspection |
| Assay (Titration / HPLC) | ≥99.0 % | Potentiometric Titration |
| Loss on Drying | ≤0.50 % | Vacuum Drying Gravimetry |
| Water Insoluble Matter | ≤0.10 % | Gravimetry |
| Heavy Metals (as Pb) | ≤10 ppm | AAS |
| Chloride (Cl⁻) | ≤0.01 % | Turbidimetry |
| Sulphate (SO42−) | ≤0.01 % | Turbidimetry |
Applications
Industrial water treatment: scale inhibitor, metal ion sequestrant for circulating cooling water, boiler water systems
Detergent & cleaning industry: raw material for heavy-duty industrial cleaners, textile scouring & bleaching auxiliaries
Electroplating & metal surface treatment: chelating additive for plating baths
Paper & pulp manufacturing: bleaching stabilizer, pulp processing auxiliary
Cosmetic & personal care: stabilizer to prevent discoloration caused by metal impuritiesLaboratory analytical reagent and fine chemical synthesis intermediate
Packing, Storage & Transportation
Packing: 25 kg woven bag with inner PE liner; fibre drum package optional. Each package marked with product name, CAS No., net weight and batch number.
Storage: Keep tightly sealed in cool, dry, well-ventilated warehouse at 5–30 ℃. Protect from moisture, dust and direct sunlight. Segregate from strong oxidants and strong bases. Shelf life: 24 months under proper sealed storage.
Transportation: Non-dangerous goods. Secure packages to prevent rupture and dust leakage. Do not transport together with oxidizing substances and food materials. Minimize dust generation during loading and unloading.
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