China Factory Direct
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| CAS number | 139-33-3 |
| Product name | Ethylenediaminetetraacetic acid disodium salt |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Agricultural GradePharmaceutical GradeMaterial GradeSpecialty GradeReagent GradeIndustrial GradeFood GradeCosmetic Grade |
| Packaging | 25KG/bag500KG/bag1000KG/bag |
| Sample | Test Samples Available (Click to Request Samples) |
| COA | View COA |
| Price | Get Quote |
| Supply Type | Bulk / Contract manufacturing / OEM |
| Shipping | FCL / LCL available |
| Payment Terms | Support FOB \ CIF \ EXW quotations, and accept Letter of Credit (L/C). |
| Manufacturer | Greenrock Chemical(China Factory) |
Based on current marketvolatility and material availability.
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
| Industry | Application | Process |
|---|---|---|
| Water Treatment | Water softening and metal ion chelation | Added to recirculating water systems to chelate calcium, magnesium, iron, and other metal ions, preventing scale formation and corrosion |
| Chemical Industry | Catalyst stabilizer | Used as a complexing agent for transition metal ions in polymerization reactions to maintain catalyst activity |
| Textiles | Dyeing auxiliary | Controls interference from metal ions during dyeing to improve dye uniformity and color fastness |
| Papermaking | Hydrogen peroxide bleaching stabilizer | Applied in chemical pulp bleaching processes to suppress heavy metal ion-catalyzed decomposition of hydrogen peroxide |
| Agriculture | Micronutrient fertilizer additive | Forms chelates with micronutrients such as zinc, iron, and manganese to enhance plant uptake efficiency |
| Food Industry | Antioxidant synergist | Added to oils and dairy products to chelate metal ions and delay oxidative spoilage |
| Pharmaceuticals | Anticoagulant (in vitro) | Used in blood collection tubes to bind calcium ions and prevent coagulation |
| Household & Personal Care | Detergent additive | Softens water in laundry detergents and dishwashing liquids to enhance cleaning performance |
| Electroplating | Electroplating bath complexing agent | Stabilizes metal ion concentrations in nickel, copper, and other electroplating processes to improve coating quality |
| Laboratory Analysis | Titrant for complexometric titration | Used in complexometric titration to determine water hardness or metal ion concentration |
| Test Item | Common Test Methods | Method Overview |
|---|---|---|
| Identification Test | Infrared Spectrophotometry (IR) | Confirm consistency of characteristic absorption peaks by comparing the infrared spectrum with standard reference spectra, used for identifying compound structure. |
| Chemical Color Reaction | Utilize EDTA’s formation of colored complexes with specific metal ions (e.g., Fe³⁺, Cu²⁺) for qualitative identification. | |
| Assay | Complexometric Titration (EDTA Titration) | Using zinc or calcium standard solution as titrant, perform complexometric titration in a pH 10 buffer system with Eriochrome Black T or calcium indicator to determine EDTA content. |
| High-Performance Liquid Chromatography (HPLC) | Use a reverse-phase C18 column, UV detector (typically around 210 nm), and external standard method for quantitative determination of the main component. | |
| pH Value | pH Meter Method | Prepare a solution of defined concentration (e.g., 5% w/v) in water and directly measure its pH using a calibrated pH meter. |
| Chlorides | Silver Nitrate Turbidimetric Method | Add silver nitrate in nitric acid medium; silver chloride white turbidity is formed with chloride ions and compared with standard sodium chloride solution for turbidity. |
| Sulfates | Barium Chloride Turbidimetric Method | Add barium chloride in hydrochloric acid medium; barium sulfate white precipitate is formed with sulfate ions and compared with standard potassium sulfate solution for turbidity. |
| Heavy Metals | Thioacetamide Colorimetric Method (or Atomic Absorption Method) | In weakly acidic conditions, thioacetamide hydrolyzes to produce hydrogen sulfide, which reacts with heavy metal ions to form colored sulfide precipitates for color comparison; alternatively, quantitative analysis can be performed using atomic absorption spectroscopy (AAS). |
| Loss on Drying | Heating to Constant Weight Method | Dry the sample at a specified temperature (e.g., 105°C) until constant weight, calculate the percentage weight loss to reflect moisture and volatile content. |
| Residue on Ignition (Sulfated Ash) | High-Temperature Ignition Method | After charring, the sample is ignited at high temperature (700–800°C), and the residual inorganic matter is weighed to assess total inorganic impurities. |
| Iron Salts | Thiocyanate Colorimetric Method | In acidic conditions, iron ions react with ammonium thiocyanate to form a red complex, which is compared with a standard iron solution for colorimetric quantification. |
| Chelating Capacity (or Effective Content) | Metal Ion Titration | Determine the actual chelating equivalent of EDTA by titrating with a known concentration of metal ions (e.g., Ca²⁺, Zn²⁺), verifying its functional activity. |
| Test Item | Specification |
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| Appearance | White crystalline powder |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.1% |
| Solubility | Freely soluble in water; practically insoluble in ethanol and ether |
| Odor | Characteristic, faint amine-like odor |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
| Pictograms | ![]() ![]() |
| Signal Word | Warning |
| Safety Data Sheet | |
1. How do you ensure product quality consistency?
We rely on a mature China-based manufacturing system and implement strict batch control and quality inspection for every shipment. Our production process complies with ISO 9001 standards, and a COA is provided for each batch to ensure consistent and reliable quality.
2. Do you offer competitive pricing for bulk orders?
Yes, as a China-based manufacturer and bulk supplier, we provide tiered pricing based on order volume. We support FOB and CIF quotations, as well as L/C payment terms for large transactions to meet international trade requirements.
3. Can you support large-volume or long-term supply?
We have stable production capacity and a well-established supply chain, enabling continuous bulk supply. We support ton-level and container-level orders, as well as long-term cooperation projects.
4. What is your typical lead time?
For in-stock products, shipment can be arranged within 1–3 days. For bulk packaging or customized orders, lead time depends on the specific quantity and production schedule.
5. What documents do you provide?
We can provide complete documentation upon request, including COA, SDS, TDS, and other compliance certificates, meeting industrial procurement and export requirements.
6. Can you customize product specifications or packaging?
Yes, we support customization of parameters such as purity, impurities, residual solvents, and heavy metals. We also offer various bulk packaging options, including 25kg bags, drums, and IBC tanks, suitable for industrial applications and transportation.
7. What shipping options do you support?
We support both FCL (Full Container Load) and LCL (Less than Container Load) shipments, and can flexibly arrange logistics solutions based on order size to meet bulk chemical export needs.
8. Do you provide technical or application support?
Yes, we provide basic application guidance and technical support based on industry experience to help customers optimize product usage.
9. How do you handle compliance and export regulations?
We are familiar with international trade and export regulations, ensuring all products comply with relevant requirements. We also provide complete documentation to support smooth customs clearance and global delivery.