China Factory Direct
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| CAS number | 33645-24-8 |
| Product name | L-THREONINE BENZYL ESTER HYDROCHLORIDE |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeReagent 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 |
|---|---|---|
| Pharmaceuticals | Used as a chiral intermediate in the synthesis of antibiotics, antiviral agents, and peptide-based drugs | Chemical synthesis, chiral resolution |
| Biochemistry | Employed as a protected amino acid in solid-phase peptide synthesis to facilitate construction of specific sequences | Solid-phase peptide synthesis |
| Research reagents | Utilized as reference standards or controls in analytical testing (e.g., HPLC, mass spectrometry) | Purification, calibration |
| Food additives | Potential precursor for synthesizing food nutrient fortificants (requires further processing) | Enzymatic catalysis or chemical modification |
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (L-Threonine Benzyl Ester Hydrochloride) | Acid-Base Titration with NaOH | Quantifies active compound by neutralizing HCl salt with standardized NaOH using phenolphthalein indicator. |
| Water Content | Karl Fischer Titration | Measures water via coulometric or volumetric reaction between water and iodine in pyridine/methanol medium. |
| Residual Solvents (e.g., Methanol, Ethyl Acetate) | Gas Chromatography (GC) with FID | Separates and quantifies volatile solvents using capillary column and flame ionization detection. |
| Heavy Metals (Pb, Cd, Hg, As) | ICP-MS | Detects trace metal impurities by ionizing sample in plasma and measuring mass-to-charge ratios. |
| Chloride Impurity | Potentiometric Titration with AgNO3 | Determines chloride ions by titration with silver nitrate using silver electrode for endpoint detection. |
| Related Substances | HPLC with UV Detection | Separates and quantifies structurally related impurities using reversed-phase C18 column and UV absorbance at 210 nm. |
| Optical Purity (Enantiomeric Excess) | Chiral HPLC | Resolves enantiomers on chiral stationary phase and calculates ee from peak area ratio. |
| Residue on Ignition | Gravimetric Analysis | Measures non-volatile inorganic residue after high-temperature ashing at 700-800 C. |
| pH of Aqueous Solution | pH Meter Measurement | Determines acidity/basicity of 1% w/v aqueous solution using calibrated glass electrode. |
| Appearance (Color and Clarity) | Visual Inspection against Standard Solutions | Compares sample solution to reference standards (e.g., APHA/Hazen scale) under controlled lighting. |
| Particle Size Distribution | Laser Diffraction | Measures size distribution by analyzing angular variation in laser light scattering pattern. |
| Microbial Limits | Membrane Filtration and Plate Count | Quantifies aerobic microorganisms by filtration, membrane transfer to agar media, and colony enumeration. |
| Test Item | Specification |
|---|---|
| Appearance | Yellow solid |
| Purity | >=98.0% (HPLC) |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Optical Rotation | -12.0 to -10.0 deg (c=1, 6M HCl) |
| Melting Point | 148 to 152 °C |
| Heavy Metals | <=20 ppm |
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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.