China Factory Direct
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| CAS number | 7536-58-5 |
| Product name | Boc-L-aspartic acid 4-benzyl ester |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeIndustrial GradeSpecialty 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 |
|---|---|---|
| Pharmaceutical Synthesis | As an amino acid protecting group intermediate for synthesizing peptide-based drugs and bioactive compounds | Used as the Boc-protected derivative of L-aspartic acid in peptide synthesis; benzyl protection is introduced via esterification, followed by hydrogenolytic removal of the benzyl group to construct the target molecule |
| Organic Synthesis | Starting material for synthesizing fine chemicals and functional molecules | Converted into functionalized intermediates—bearing specific functional groups—via selective hydrolysis, coupling, or reduction reactions for assembly of complex molecules |
| Biochemical Research | Studying aspartic acid–related enzymatic reactions and metabolic pathways | Applied as a substrate mimic or probe in enzyme kinetics and structural biology studies; its protecting group enhances stability and facilitates isolation and purification |
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantifies main component by retention time and UV absorbance relative to reference standard. |
| Related Substances | HPLC-UV | Detects and quantifies structurally related impurities using gradient elution and UV detection. |
| Residual Solvents | GC-FID | Measures volatile organic solvents (e.g., DMF, toluene) via gas chromatographic separation and flame ionization detection. |
| Water Content | Karl Fischer Titration | Determines water by volumetric or coulometric titration with iodine-based reagent reacting stoichiometrically with water. |
| Optical Rotation | [alpha]D Measurement | Measures specific rotation using sodium D-line light to confirm chiral integrity and enantiomeric purity. |
| Heavy Metals | ICP-OES | Quantifies elemental impurities (e.g., Pb, Cd, Ni) after acid digestion using inductively coupled plasma optical emission spectrometry. |
| Chloride Content | Ion Chromatography | Separates and quantifies chloride ions based on anion exchange and conductivity detection. |
| Sulfated Ash | Gravimetric Analysis | Measures inorganic residue after high-temperature combustion in presence of sulfuric acid. |
| Melting Point | Capillary Melting Point Apparatus | Determines temperature range at which solid transitions to liquid, indicating crystallinity and purity. |
| Appearance | Visual Inspection | Assesses physical state, color, and clarity against defined specifications under controlled lighting. |
| Particle Size Distribution | Laser Diffraction | Measures size distribution of solid particles in suspension using angular scattering intensity of laser light. |
| Residual Benzyl Chloride | GC-MS | Identifies and quantifies trace benzyl chloride by gas chromatographic separation coupled with mass spectrometric detection. |
| Test Item | Specification |
|---|---|
| Appearance | White crystalline solid |
| Purity | >=98.0% (by LC-MS) |
| Water Content (KF) | <=0.5% |
| Melting Point | 128°C - 132°C |
| Optical Rotation | -20.0° ± 1.0° (c=1, in DMF) |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=10 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.