China Factory Direct
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| CAS number | 15137-09-4 |
| Product name | EDTA-2NACO TETRAHYDRATE |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical 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 |
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| Chemical | Formulation of chelating agents | Dissolving cobalt(II) sodium EDTA hydrate in water to prepare a solution |
| Pharmaceutical | Production of pharmaceutical intermediates | Using cobalt(II) sodium EDTA hydrate as a raw material in synthesis reactions |
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Observe the sample's color (typically reddish-brown or purplish-red crystalline powder), physical state (e.g., caking, deliquescence), and presence of impurities. |
| Identification Test | Infrared Spectroscopy (IR) | Compare characteristic absorption peaks (e.g., C=O, N–CH₂, Co–N) in the infrared spectrum to confirm molecular structure. |
| Atomic Absorption Spectroscopy (AAS) or ICP-OES | Detect characteristic spectral lines of cobalt to confirm its presence; sodium content may also be analyzed to support identification. | |
| Cobalt Content | Complexometric Titration (EDTA Back Titration) | Add excess standard EDTA solution to complex with Co²⁺ at pH ≈ 5–6. Use xylenol orange as indicator and back-titrate the unreacted EDTA with standard Zn²⁺ solution to calculate cobalt content. |
| Atomic Absorption Spectroscopy (AAS) | Digest the sample and determine cobalt concentration by AAS, then convert to CoNa₂EDTA content. | |
| EDTA Content | Acid-Base Titration or Complexometric Titration | In strong acidic conditions, EDTA releases carboxylic acid groups which can be titrated with NaOH to determine total acidity and indirectly calculate EDTA content; alternatively, use metal ion titration to assess total chelating capacity. |
| Sodium Content | Flame Atomic Absorption Spectroscopy (FAAS) | After appropriate sample preparation, determine sodium concentration using FAAS to verify stoichiometric ratio. |
| Loss on Drying | Thermogravimetric Analysis (TGA) or Constant Weight Drying Method | Dry the sample at 105°C to constant weight and calculate percentage mass loss to evaluate water of crystallization and volatile impurities. |
| Residue on Ignition (Sulfated Ash) | High-Temperature Incineration | Ignite the sample at high temperature (approx. 800°C), then weigh the residual inorganic matter to assess total inorganic impurities. |
| pH Value | pH Meter Measurement | Prepare an aqueous solution of defined concentration (e.g., 1% w/v), and measure pH using a calibrated pH meter (typically within range 4.0–6.0). |
| Water-Insoluble Matter | Filtration and Gravimetric Method | Dissolve the sample in water, filter insoluble residues, dry, and weigh to calculate percentage of water-insoluble matter. |
| Heavy Metals (as Pb) | Thioacetamide Colorimetry or ICP-MS | Perform color development reaction according to pharmacopoeial methods for visual comparison, or use highly sensitive ICP-MS to determine trace levels of lead and other heavy metals. |
| Anionic Impurities (e.g., Chlorides, Sulfates) | Ion Chromatography (IC) or Turbidimetry | Separate and detect common anionic impurities using ion chromatography, or apply pharmacopoeial turbidimetric methods for semi-quantitative assessment. |
| Test Item | Specification |
|---|---|
| Appearance | Purple to dark purple or dark red powder to crystals |
| Purity | >=98.0% |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.3% |
| Solubility | Freely soluble in water; slightly soluble in ethanol |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
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.