7-Dehydrocholesterol Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 434-16-2 |
| Product name | 7-Dehydrocholesterol |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical 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) |
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Documents We Provide for 7-Dehydrocholesterol
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 7-Dehydrocholesterol Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 7-Dehydrocholesterol
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Precursor to vitamin D3, used in cholecalciferol (vitamin D3) synthesis | Photochemical conversion: UVB irradiation (wavelength ~290–315 nm) induces ring-opening to form vitamin D3 |
| Food & Nutrition Fortification | Raw material for vitamin D3 production in food and dietary supplements | Extracted from lanolin or yeast fermentation products, then purified for use in nutritional fortificant manufacturing |
| Cosmetics | Incorporated into skincare formulations; converted to vitamin D3 upon skin exposure to light, supporting skin health | Formulated into products to enable localized photoconversion on the skin surface |
| Life Science Research | Used in studies of cholesterol metabolism, vitamin D biosynthesis, and photochemical reaction mechanisms | Synthesized in the laboratory or isolated from natural sources for cell culture, enzymology, and photochemical experiments |
Manufacturing Quality Control of 7-Dehydrocholesterol
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination using reversed-phase HPLC with UV detection at 280 nm, based on peak area comparison against a certified reference standard. |
| Related Substances | HPLC-DAD | Separation and detection of structurally similar impurities using HPLC coupled with diode array detection, with identification and quantification relative to the main peak. |
| Residual Solvents | GC-FID | Headspace gas chromatography with flame ionization detection to quantify volatile organic solvents remaining from synthesis or purification. |
| Water Content | Karl Fischer Titration | Electrochemical titration using iodine generated in situ to determine water content based on stoichiometric reaction with Karl Fischer reagent. |
| Heavy Metals | ICP-MS | Quantification of trace metal contaminants (e.g., Pb, Cd, Hg, As) by inductively coupled plasma mass spectrometry after acid digestion. |
| Residue on Ignition | Gravimetric Analysis | Measurement of inorganic ash content by ignition at 700-800 C and weighing the residual non-volatile matter. |
| Optical Rotation | Polarimetry | Determination of specific optical rotation using sodium D-line light to confirm chiral integrity and identity. |
| Melting Point | Capillary Melting Point Apparatus | Thermal analysis to verify identity and purity by measuring the temperature range over which the solid transitions to liquid. |
| pH of Solution | Potentiometric pH Measurement | Determination of aqueous suspension pH using calibrated glass electrode to assess acidic/basic degradation products. |
| Particle Size Distribution | Laser Diffraction | Analysis of dry powder particle size via light scattering pattern generated by dispersed particles in air. |
| Microbial Contamination | Membrane Filtration | Quantitative detection of aerobic microorganisms by filtration, membrane transfer to agar media, and colony enumeration after incubation. |
| Sterility | Direct Inoculation | Testing for absence of viable microorganisms by inoculating product into culture media and observing for growth under controlled conditions. |
Technical Specifications of 7-Dehydrocholesterol
| Test Item | Specification |
|---|---|
| Appearance | Pale-yellow solid |
| Purity | >=98.5% (by NMR) |
| Melting Point | 143-147°C |
| Optical Rotation | -120° to -118° (c=1, in chloroform) |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 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 7-Dehydrocholesterol
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 7-Dehydrocholesterol
Packaging of 7-Dehydrocholesterol
Industrial 7-Dehydrocholesterol 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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