China Factory Direct
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| CAS number | 59935-30-7 |
| Product name | L-ISOLEUCINE-15N |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Agricultural GradePharmaceutical GradeReagent 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) |
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 |
|---|---|---|
| Biomedical Research | Stable isotope-labeled tracers | Applied in metabolic pathway studies to track amino acid metabolism in biological systems using mass spectrometry or nuclear magnetic resonance (NMR) |
| Pharmaceutical Development | Pharmacokinetic studies | Used as internal standards for quantitative analysis of drugs and their metabolites, enhancing accuracy in liquid chromatography–mass spectrometry (LC-MS) detection |
| Life Sciences Research | Protein synthesis and structural studies | Applied in cell-free translation systems or cell culture to label specific proteins for investigating structure, function, and folding mechanisms |
| Agricultural Science | Plant nutrient uptake studies | Applied to investigate plant absorption and utilization efficiency of amino acids, and to evaluate the bioavailability of novel fertilizers |
| Food Science | Nutritional metabolism studies | Applied in human or animal trials to assess dietary protein utilization and amino acid metabolic balance |
| Detection Item | Common Analytical Method | Method Overview |
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| Assay (Purity) | HPLC-UV | Separation on a chiral or reversed-phase column with UV detection at 200-220 nm; quantitation against certified reference standard. |
| Enantiomeric Purity | Chiral HPLC | Resolution using a chiral stationary phase; detection by UV; comparison of L- and D-isoleucine peak areas. |
| 15N Isotopic Enrichment | EA-IRMS | Combustion to N2 gas followed by isotope ratio mass spectrometry to determine 15N/14N ratio relative to international standards. |
| Loss on Drying | Gravimetric Analysis | Weight loss measured after drying at 105 C for 2 hours under controlled humidity and airflow. |
| Residue on Ignition | Gravimetric Analysis | Mass of inorganic residue remaining after ashing at 550-600 C in a muffle furnace. |
| Heavy Metals (as Pb) | ICP-OES | Digestion with nitric acid/hydrogen peroxide followed by multi-element quantification via plasma optical emission. |
| Chloride | Potentiometric Titration | Titration with silver nitrate using a silver indicator electrode; endpoint detected by potential change. |
| Sulfate | Turbidimetric Analysis | Precipitation as barium sulfate in acidic medium; quantitation by measuring light scattering at 420 nm. |
| pH (1% aqueous solution) | Potentiometric Measurement | Measurement using calibrated pH electrode in a 10 mg/mL aqueous solution at 25 C. |
| Specific Optical Rotation | [a]D | Measurement of plane-polarized light rotation in 1 M HCl solution at 20 C using sodium D-line (589 nm). |
| Related Substances | HPLC-UV | Detection and quantitation of impurities (e.g., L-leucine, L-valine, desamino derivatives) using gradient reversed-phase chromatography. |
| Microbial Contamination | Membrane Filtration | Filtration of sample solution followed by incubation on soybean-casein digest agar and tryptic soy agar; colony enumeration. |
| Test Item | Specification |
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| Appearance | White to off-white crystalline powder |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Melting Point | 280-285°C (decomposes) |
| Optical Rotation | +27.0 to +29.0° (c=1, H2O) |
| 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.