L-Tryptophan Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 73-22-3 |
| Product name | L-Tryptophan |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial 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 L-Tryptophan
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk L-Tryptophan Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of L-Tryptophan
| Industry | Application | Process |
|---|---|---|
| Animal Feed Industry | Essential Amino Acid for Nutritional Balance | Serves as an essential amino acid to supplement limiting amino acids (e.g., in swine and poultry diets) in compound feeds, thereby improving dietary protein utilization and reducing crude protein levels in feed formulations. |
| Pharmaceutical Industry | Raw Material for Drug Synthesis | Used in the synthesis of various peptide-based therapeutics, amino acid infusion solutions, and as a component of antidepressants (e.g., as a precursor to serotonin). |
| Pharmaceutical Industry | Nutritional Supplement | Employed in the preparation of compounded amino acid injection and oral solutions to improve nutritional status and treat amino acid deficiency disorders. |
| Food Industry | Food Fortificant | Added to infant formula, dietary supplements, and functional beverages to enhance nutritional value. |
| Food Industry | Flavor Modulator | Utilized for its taste-modifying properties to enhance food flavor profiles or mask bitterness. |
| Chemical & Biotechnology Industry | Precursor to Bioactive Compounds | Serves as a synthetic precursor to indole alkaloids, plant growth regulators (e.g., indole-3-acetic acid), and neurotransmitters (e.g., serotonin). |
| Scientific Research | Cell Culture Component | Functions as a critical nutrient component in cell culture media for cell biology research and upstream biopharmaceutical manufacturing processes. |
| Agriculture | Raw Material for Plant Growth Regulators | Used in the synthesis of plant growth regulators or applied directly as a plant growth stimulant. |
Manufacturing Quality Control of L-Tryptophan
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Assay | High-Performance Liquid Chromatography (HPLC) | Utilizes a reversed-phase C18 chromatographic column with a UV detector (typically at ~280 nm); qualitative identification is based on retention time, and quantitative determination is performed by peak area to accurately measure the content of L-tryptophan. |
| Identification | Ultraviolet-Visible Spectrophotometry (UV-Vis) | L-tryptophan exhibits characteristic absorption peaks at approximately 219 nm and 280 nm; identification is performed by comparing the sample's spectrum with that of a reference standard. |
| Infrared Spectroscopy (IR) | The sample is mixed with potassium bromide and pressed into a pellet; the infrared absorption spectrum is measured and compared with a standard reference spectrum to confirm functional group structure. | |
| Specific Rotation | Polarimetry | The specific rotation of an L-tryptophan aqueous solution is measured using a polarimeter (typically +1.5° to +3.5°, c=1 in 1 M HCl) to verify optical purity and configuration. |
| Related Substances (Impurities) | High-Performance Liquid Chromatography (HPLC) | Gradient elution is employed to separate L-tryptophan from potential impurities (e.g., other amino acids, degradation products); the peak areas of impurities are calculated to control the total impurity level. |
| Loss on Drying | Thermogravimetric Analysis (TGA) or Oven Drying Method | The sample is dried at 105°C until constant weight is achieved; the percentage weight loss is measured to determine the content of moisture and volatile impurities. |
| Residue on Ignition (Ash) | Sulfated Ash Method | The weight of inorganic residue remaining after high-temperature ignition of the sample is measured to control the level of inorganic impurities. |
| Heavy Metals | Atomic Absorption Spectroscopy (AAS) or Sulfide Colorimetric Method | AAS precisely quantifies heavy metals such as lead and cadmium; the colorimetric method involves reaction with hydrogen sulfide to form a colored precipitate for semi-quantitative detection. |
| Microbial Limits | Microbial Culture Method | According to pharmacopoeial requirements, total aerobic microbial count, mold and yeast count, and specified pathogens (e.g., Escherichia coli, Salmonella) are tested. |
| Solution Clarity and Color | Visual Comparison or Spectrophotometry | The L-tryptophan solution is prepared in water and visually compared with standard turbidity and color reference solutions to determine whether the solution is clear and colorless or meets specified color requirements. |
Technical Specifications of L-Tryptophan
| Test Item | Specification |
|---|---|
| Appearance | White crystalline solid |
| Purity | >=98.5% (HPLC) |
| Water Content (KF) | <=0.5% |
| Melting Point | 289-293°C (decomposes) |
| Optical Rotation | -31.0 to -32.5° (c=1, H2O) |
| Total Impurities | <=1.5% (HPLC) |
| Heavy Metals | <=10 ppm (as Pb) |
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 L-Tryptophan
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of L-Tryptophan
Packaging of L-Tryptophan
Industrial L-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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