China Factory Direct
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| CAS number | 37169-36-1 |
| Product name | (S)-Methyl 2-((tert-butoxycarbonyl)aMino)-3-(3,4-dihydroxyphenyl)propanoate |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeReagent 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 |
|---|---|---|
| Pharmaceuticals | Used as a pharmaceutical intermediate in the synthesis of peptide- or protein-based drugs | Applied in organic synthesis and protecting group reactions |
| Biochemistry | Used for modification and structural studies of peptides or proteins | Applied in enzyme-catalyzed and chemical modification reactions |
| Research Reagents | Used as a reference standard or reagent in chemical and biological research laboratories | Applied in chromatographic purification and chemical synthesis |
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination based on peak area comparison against a certified reference standard using reversed-phase chromatography and UV detection at ~220 nm. |
| Chiral Purity | Chiral HPLC | Enantiomeric excess assessment using a chiral stationary phase to resolve L- and D-enantiomers; quantification via UV detection. |
| Residual Solvents | GC-FID | Identification and quantification of volatile organic solvents (e.g., methanol, ethyl acetate) by gas chromatography with flame ionization detection. |
| Water Content | Karl Fischer Titration (Coulometric) | Electrochemical titration measuring water content based on the stoichiometric reaction of iodine with water in anhydrous pyridine/methanol medium. |
| Heavy Metals | ICP-MS | Multi-element trace metal quantification (e.g., Pb, Cd, Ni, Fe) after acid digestion, using inductively coupled plasma mass spectrometry for sub-ppq sensitivity. |
| Residual Palladium | ICP-MS | Specific quantification of residual Pd catalyst (if used in synthesis) via isotope-specific detection after microwave-assisted acid digestion. |
| Related Substances | HPLC-UV (Forced Degradation Study) | Detection and quantification of structurally related impurities (e.g., de-BOC derivative, hydrolyzed acid, dimer) under stressed conditions (acid/base/oxidative/thermal). |
| Appearance & Color | Visual Inspection / APHA Color Scale | Subjective visual assessment against water or APHA color standards under controlled lighting; evaluation of solution clarity and hue. |
| Melting Point | Capillary Melting Point Apparatus | Thermal transition measurement using calibrated capillary apparatus; onset and range indicate crystallinity and purity. |
| Residue on Ignition | Gravimetric Analysis | Determination of inorganic ash content after high-temperature (700–800 °C) incineration and precise weighing of residual residue. |
| Optical Rotation | [α]D Measurement (Polarimetry) | Quantification of specific rotation at 589 nm (Na-D line) to confirm chiral integrity and concentration-corrected enantiomeric identity. |
| Particle Size Distribution | Laser Diffraction | Analysis of dry powder particle size distribution based on angular scattering pattern of laser light through dispersed sample. |
| Microbial Limits | Membrane Filtration / Plate Count | Enumeration of aerobic microorganisms and detection of specified pathogens (e.g., E. coli, S. aureus) per pharmacopeial methods (USP <61>, <62>). |
| Test Item | Specification |
|---|---|
| Appearance | Off-white crystalline solid |
| Purity | >=98.0% (LC-MS) |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Melting Point | 148–152°C |
| Optical Rotation | -15.0° to -19.0° (c=1, in methanol) |
| 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.