China Factory Direct
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| CAS number | 6028-28-0 |
| Product name | DL-Threonine hydrate(2:1) |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Agricultural GradePharmaceutical GradeReagent GradeCosmetic GradeFood 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 |
|---|---|---|
| Food Additives | Flavor enhancer, nutritional fortification | Added directly to food or incorporated after blending with other ingredients |
| Pharmaceuticals | Synthetic intermediate for active pharmaceutical ingredients (APIs) | Used in chemical reaction steps for synthesizing specific drug molecules |
| Animal Feed | Feed additive | Supplied as an amino acid supplement by direct mixing into feed raw materials |
| Cosmetics | Ingredient in skin care products | Incorporated into cosmetic formulations as a moisturizing factor or other functional component |
| Research | Biochemical research | Used as experimental material—e.g., substrate or inhibitor—in biochemical assays such as enzyme activity testing |
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (DL-Threonine Content) | Acid-Base Titration with HClO4 in non-aqueous medium | Quantifies threonine by titrating its amino group with perchloric acid in glacial acetic acid using crystal violet indicator. |
| Optical Rotation | [alpha]D Measurement using Polarimetry | Measures specific rotation at 20 C and 589 nm to confirm chiral purity and identity of DL-racemate. |
| Water Content | Karl Fischer Titration | Determines total water (including hydrate water) via iodometric redox reaction with coulometric or volumetric KF reagent. |
| Residue on Ignition | Gravimetric Analysis after High-Temperature Ashing | Measures inorganic impurities as sulfate ash after ignition at 700-800 C. |
| Heavy Metals (Pb, Cd, Hg, As) | ICP-MS or ICP-OES | Quantifies trace metals by plasma ionization and mass spectrometric or optical emission detection. |
| Chloride Impurity | Potentiometric Titration with AgNO3 | Determines chloride ions by argentometric titration using silver nitrate and a silver electrode. |
| Sulfate Impurity | Turbidimetric Analysis with BaCl2 | Measures sulfate as barium sulfate precipitate formed in acidic medium, quantified by light scattering. |
| Related Substances (Impurity Profile) | HPLC with UV Detection | Separates and quantifies structurally related amino acids and degradation products using reversed-phase C18 column and UV detection at 200 nm. |
| pH of Aqueous Solution | Potentiometric pH Measurement | Determines pH of 1% w/v aqueous solution using calibrated glass electrode. |
| Loss on Drying | Gravimetric Analysis at 105 C | Measures volatile matter loss after drying at 105 C for 2 hours under atmospheric pressure. |
| Microbial Limits | Membrane Filtration followed by TSA/SDA Plating | Quantifies aerobic mesophilic bacteria and fungi using membrane filtration and incubation on Tryptic Soy Agar and Sabouraud Dextrose Agar. |
| Particle Size Distribution | Laser Diffraction | Determines particle size distribution by measuring angular variation in intensity of laser light scattered by dispersed particles. |
| Test Item | Specification |
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| Appearance | White crystalline powder |
| Purity | >=98.0% |
| Water Content (KF) | <=0.5% |
| Melting Point | 210-215°C (decomposes) |
| Optical Rotation | -28.0 to -29.0° (c=2, H2O) |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Residue on Ignition | <=0.1% |
| Heavy Metals | <=10 ppm |
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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.