China Factory Direct
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| CAS number | 4587-33-1 |
| Product name | BOC-ASP-OH |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial Grade |
| Packaging | 25KG/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 Chemicals | Synthesis of peptide-based drugs | Solid-phase or solution-phase peptide synthesis (used as a reagent for introducing asparagine residues, forming peptide bonds via reaction of activated esters with amino groups) |
| Biochemistry | Preparation of bioactive peptides | Fragment condensation (used to synthesize protected peptide fragments, with BOC groups serving as temporary protecting groups to suppress side reactions) |
| Research Reagents | Studies on amino acid derivatives | Protecting group chemistry experiments (used to investigate protection and deprotection strategies for the asparagine side chain, as well as reaction kinetics) |
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantification via UV absorption at characteristic wavelength using reverse-phase chromatography with external standard calibration. |
| Related Substances | HPLC-UV | Separation and detection of structurally related impurities using gradient reverse-phase HPLC with UV detection. |
| Residual Solvents | GC-FID | Identification and quantification of volatile organic solvents by gas chromatography with flame ionization detection. |
| Water Content | Karl Fischer Titration | Volumetric or coulometric titration based on the stoichiometric reaction of iodine with water in pyridine/methanol medium. |
| Heavy Metals | ICP-OES | Multi-element quantification of toxic metals (e.g., Pb, Cd, Hg, As) after acid digestion, using plasma optical emission spectroscopy. |
| Chloride Impurity | Ion Chromatography | Separation and conductivity detection of chloride ions in aqueous extract after sample dissolution and filtration. |
| Optical Rotation | [alpha]D Measurement | Determination of specific rotation using a polarimeter at 20 degrees C and sodium D-line (589 nm) to confirm chiral integrity. |
| Melting Point | Capillary Melting Point Apparatus | Thermal transition measurement by observing solid-to-liquid phase change under controlled heating rate. |
| Residue on Ignition | Gravimetric Analysis | Weighing of inorganic residue remaining after high-temperature ashing of sample in a muffle furnace. |
| pH of Solution | Potentiometric pH Measurement | Measurement of hydrogen ion activity in aqueous suspension using calibrated glass electrode and pH meter. |
| Particle Size Distribution | Laser Diffraction | Analysis of size distribution based on angular variation of scattered laser light from dispersed particles in liquid medium. |
| Microbial Contamination | Membrane Filtration | Quantitative enumeration of aerobic microorganisms by filtration, membrane transfer to culture media, and colony counting after incubation. |
| Test Item | Specification |
|---|---|
| Appearance | White to almost white powder or crystals |
| Purity | >=98.0% |
| Water Content (KF) | <=0.5% |
| Melting Point | 128-132 °C |
| Optical Rotation | -42.0 to -38.0 ° (c=1, in DMF) |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 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.