DL-Leucine Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 328-39-2 |
| Product name | DL-Leucine |
| 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 DL-Leucine
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk DL-Leucine Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of DL-Leucine
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Active pharmaceutical ingredient (API) for amino acid-based formulations, including compound amino acid injection solutions (e.g., 3H, 6H) | Produced via starch fermentation or chemical synthesis, followed by purification, crystallization, and drying to meet pharmacopoeial specifications |
| Food | Nutritional fortificant for protein enrichment | Incorporated into cereal-based products such as bread and pastries to improve amino acid balance; alternatively blended into amino acid nutritional fortificant mixtures |
| Animal Feed | Nutritional fortificant for animal growth promotion | Added to swine and poultry feed as an essential amino acid supplement |
| Cosmetics | Skin-conditioning agent and humectant | Formulated into skincare products to support skin health and enhance moisture retention |
| Research | Biochemical reagent for cell culture medium preparation | Serves as a nitrogen source and nutrient component in microbial fermentation and cell culture media |
Manufacturing Quality Control of DL-Leucine
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | Acid-Base Titration | Quantifies DL-leucine content via titration with standardized NaOH using phenolphthalein indicator. |
| Specific Optical Rotation | Polarimetry | Measures rotation of plane-polarized light by chiral DL-leucine in solution at specified concentration and wavelength. |
| Loss on Drying | Gravimetric (Thermogravimetric) | Determines volatile matter content by measuring mass loss after drying at 105 C for 2 hours. |
| Residue on Ignition | Gravimetric (Sulfated Ash) | Quantifies inorganic impurities by ignition of sample at 600-700 C and weighing residual ash. |
| Chloride Impurity | Argentometric Titration (Mohr method) | Determines chloride ions via precipitation titration with standard AgNO3 using K2CrO4 indicator. |
| Sulfate Impurity | Barium Sulfate Turbidimetry | Measures sulfate as insoluble BaSO4 precipitate formed upon addition of BaCl2 in acidic medium. |
| Heavy Metals (as Pb) | Colorimetric (Dithizone method) | Forms colored metal-dithizone complexes in acidic medium; intensity compared to lead standard. |
| Iron Impurity | UV-Vis Spectrophotometry (1,10-Phenanthroline) | Forms orange-red Fe(II)-phenanthroline complex; absorbance measured at ~510 nm. |
| Ammonium Impurity | Nesslerization | Forms yellow-brown colloidal complex between NH4+ and Nessler's reagent; color intensity proportional to concentration. |
| Related Substances | HPLC (Reverse Phase) | Separates and quantifies structural analogs and degradation products using C18 column and UV detection. |
| Water Content | Karl Fischer Titration | Electrochemically determines water via iodine-sulfur dioxide reaction in pyridine-methanol medium. |
| Microbial Limits | Membrane Filtration / Plate Count | Quantifies aerobic microorganisms using membrane filtration followed by incubation on TSA agar. |
Technical Specifications of DL-Leucine
| Test Item | Specification |
|---|---|
| Appearance | White crystalline solid |
| Purity | >=98.5% (HPLC) |
| Water Content (KF) | <=0.5% |
| Melting Point | 276-282°C |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=10 ppm |
| Residue on Ignition | <=0.1% |
| Optical Rotation | -0.5° to +0.5° (c=1, H2O) |
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 DL-Leucine
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of DL-Leucine
Packaging of DL-Leucine
Industrial DL-Leucine 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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