China Factory Direct
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| CAS number | 90-19-7 |
| Product name | Rhamnetin |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Reagent GradeFood GradeCosmetic 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 |
|---|---|---|
| Pharmaceuticals | Antioxidant, anti-inflammatory, and antitumor activity studies; potential drug development for cardiovascular diseases, diabetes, and neurodegenerative disorders | Used as a lead compound in drug synthesis and structural modification; pharmacological activity screening conducted in vitro and in animal models |
| Cosmetics | Skin antioxidant and anti-aging ingredient; tyrosinase inhibition for skin-lightening products | Incorporated into emulsions, serums, and other formulations, typically at low concentrations (<1%) and co-formulated with other active ingredients |
| Food | Natural flavonoid-based antioxidant; functional food additive research | Isolated and purified from plant extracts (e.g., Sophora japonica buds, Rhamnus species) and added to dietary supplements or beverages |
| Research | Tool for molecular biology and cell signaling pathway studies; used to elucidate the biological activity mechanisms of flavonoids | Employed as a reference standard or reagent in laboratories for chromatographic analysis, enzyme activity assays, and cell-based experiments |
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantifies rhamnetin content by separation on a reversed-phase column and UV detection at ~370 nm. |
| Related Substances | HPLC-DAD | Identifies and quantifies structurally related impurities using diode-array detection for spectral confirmation. |
| Loss on Drying | Gravimetric (105 C, 2 h) | Measures volatile matter by weight loss after drying under standardized thermal conditions. |
| Residue on Ignition | Sulfated Ash Gravimetry | Determines inorganic residue after charring and sulfuric acid treatment followed by high-temperature ignition. |
| Heavy Metals (Total) | ICP-OES | Quantifies cumulative heavy metal content (e.g., Pb, Cd, Hg, As) via plasma emission spectroscopy after acid digestion. |
| Lead | Graphite Furnace AAS | Measures lead concentration using atomization in a graphite furnace and atomic absorption at 283.3 nm. |
| Arsenic | Hydride Generation AAS | Converts arsenic to arsine gas, then detects atomic absorption after quartz cell atomization. |
| Melting Point | Capillary Melting Point Apparatus | Determines temperature range at which solid rhamnetin transitions to liquid phase under controlled heating. |
| Solubility in Ethanol | Visual Observation/USP <41> | Assesses complete dissolution in specified ethanol concentration at defined temperature and time. |
| Water Content | Karl Fischer Titration | Quantifies water via iodometric titration with coulometric or volumetric reagents. |
| Particle Size Distribution | Laser Diffraction | Measures size distribution of dry powder using angular scattering pattern of laser light. |
| Microbial Limits | Membrane Filtration & Culture | Detects and enumerates aerobic mesophilic microorganisms per pharmacopeial compendia. |
| Test Item | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| Purity | >=98.5% |
| Melting Point | 178-182°C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Residue on Ignition | <=0.1% |
| Heavy Metals | <=10 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.