D(+)-Tryptophan Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 153-94-6 |
| Product name | D(+)-Tryptophan |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeMaterial GradeSpecialty 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) |
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Documents We Provide for D(+)-Tryptophan
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk D(+)-Tryptophan Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of D(+)-Tryptophan
| Industry | Application | Process |
|---|---|---|
| Food Industry | Nutritional fortificant | Produced via fermentation |
| Pharmaceutical Industry | Pharmaceutical intermediate | Synthesized chemically |
| Cosmetics Industry | Humectant | Isolated and purified |
| Industrial Manufacturing | Biocatalyst | Produced via fermentation enhancement |
| Research | Biochemical laboratory reagent | Isolated and purified |
Manufacturing Quality Control of D(+)-Tryptophan
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Identification | Infrared Spectroscopy (IR) | Perform infrared scanning of the sample and reference standard under identical conditions, and compare characteristic absorption peaks to confirm molecular structure consistency. |
| Specific Optical Rotation Method | Utilize the characteristic optical activity of D-tryptophan to measure its specific rotation under sodium lamp light, verifying configurational purity. | |
| Assay | High-Performance Liquid Chromatography (HPLC) | Use a reversed-phase C18 column with a UV detector (~280 nm); identify D-tryptophan by retention time and quantify it based on peak area for accurate determination of content. |
| Amino Acid Automatic Analyzer Method | Based on ion-exchange chromatography and post-column derivatization principles, specifically designed for separation and quantification of amino acids, suitable for determining D-tryptophan in complex matrices. | |
| Related Substances (Impurities) | High-Performance Liquid Chromatography (HPLC) | Detect possible impurities generated during synthesis or storage (e.g., L-tryptophan, intermediates, degradation products) using gradient elution to enhance separation resolution. |
| Water Content | Karl Fischer Method | Available in volumetric or coulometric forms; precisely measures trace amounts of water in the sample. |
| Loss on Drying | Thermogravimetric Analysis (TGA) or Oven Drying Method | Dry the sample at a specified temperature and calculate the content of volatile components based on weight loss; commonly used in raw material quality control. |
| Residue on Ignition | Sulfated Ash Method | Carbonize the sample at high temperature, treat with sulfuric acid, and determine the mass of non-combustible inorganic residues after constant weight. |
| Heavy Metals | Atomic Absorption Spectroscopy (AAS) or ICP-MS | After sample digestion, measure concentrations of heavy metal elements such as lead, cadmium, and mercury to ensure compliance with pharmacopeial limits. |
| Microbial Limits | Microbial Limit Test | Perform assays according to pharmacopeial requirements, including total aerobic microbial count, mold and yeast counts, and control organism tests (e.g., Escherichia coli, Salmonella). |
| Crystalline Form Analysis | X-ray Diffraction (XRD) | Analyze the crystal structure of D-tryptophan to determine the presence of polymorphs or amorphous impurities, ensuring batch-to-batch consistency. |
| Particle Size Distribution | Laser Diffraction Particle Size Analysis | Measure the size and distribution of powder particles, which influence solubility and formulation process performance. |
Technical Specifications of D(+)-Tryptophan
| Test Item | Specification |
|---|---|
| Appearance | Pale-yellow solid |
| Purity | >=99.0% (HPLC) |
| Water Content (KF) | <=0.5% |
| Optical Rotation | +29.0 to +33.0° (c=1, H2O) |
| Melting Point | 289 to 293°C (decomposes) |
| Total Impurities | <=1.0% |
| Single Impurity | <=0.5% |
| Residue on Ignition | <=0.1% |
| Heavy Metals | <=10 ppm |
Specifications vary by industry. Reach out to our technical experts for a COA tailored specifically to your application. Email:selse@GRchemical.com
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Download COA of D(+)-Tryptophan
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of D(+)-Tryptophan
Packaging of D(+)-Tryptophan
Industrial D(+)-Tryptophan Procurement FAQ
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.
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