303-43-5 Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 303-43-5 |
| Product name | 303-43-5 |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeReagent GradeFood Grade |
| Packaging | 25KG/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 303-43-5
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 303-43-5 Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 303-43-5
| Industry | Application | Process |
|---|---|---|
| Cosmetics | Used as an emollient, emulsion stabilizer, and skin-conditioning agent in creams, lotions, sunscreens, and similar products | Mixed with other lipid components in formulation and processed via homogenization or heated emulsification to form stable emulsion systems |
| Pharmaceuticals | Used as a drug carrier or sustained-release excipient to enhance the bioavailability of lipophilic drugs | Codissolved with active pharmaceutical ingredients in the lipid phase and processed via melt-cooling or microemulsification to prepare drug-loaded systems |
| Biomedical Research | Used as a model component for cell membranes or as a cholesterol supplementation source in in vitro cell culture experiments | Dissolved in ethanol or DMSO prior to addition to culture medium, or incorporated into liposomes/artificial membrane structures |
| Food (indirect) | Used as a raw material or intermediate for food additives (e.g., emulsifiers), subject to regulatory compliance | Processed via transesterification or purification to yield high-purity product, then added to food formulations under GMP standards |
| Analytical Chemistry | Used as a reference standard or internal standard in gas chromatography or mass spectrometry analysis | Accurately weighed and prepared as a standard solution for quantitative detection of sterol compounds in biological samples |
Manufacturing Quality Control of 303-43-5
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantification using reverse-phase HPLC with UV detection at 205 nm, calibrated against certified reference standard. |
| Identity | FTIR Spectroscopy | Comparison of sample infrared absorption spectrum to reference cholesterol oleate spectrum, focusing on ester C=O and alkyl C-H bands. |
| Acid Value | Acid-Base Titration | Neutralization of free fatty acids with standardized KOH solution using phenolphthalein indicator. |
| Saponification Value | Back Titration after Alkaline Hydrolysis | Hydrolysis with excess KOH, followed by titration of unreacted alkali with standardized HCl. |
| Iodine Value | Wijs Method | Addition of iodine monochloride to double bonds, followed by titration of unreacted iodine with sodium thiosulfate. |
| Peroxide Value | Titration with Potassium Iodide | Oxidation of iodide to iodine by peroxides in acidic medium, followed by titration with sodium thiosulfate. |
| Heavy Metals (as Pb) | AAS | Atomic absorption spectroscopy after wet digestion and matrix-matched calibration for lead content. |
| Residue on Ignition | Gravimetric Analysis | Weighing residue remaining after high-temperature ashing at 600-700 C. |
| Water Content | Karl Fischer Titration | Electrometric end-point detection of water via iodine-sulfur dioxide reaction in pyridine/methanol medium. |
| Melting Point | Capillary Melting Point Apparatus | Determination of temperature range at which solid-to-liquid phase transition occurs under controlled heating. |
| Color (Gardner Scale) | Visual Comparison or Colorimeter | Comparison of sample solution color in solvent (e.g., chloroform) against Gardner liquid color standards. |
| Organic Volatile Impurities | GC-FID | Separation and quantification of residual solvents and volatile impurities using gas chromatography with flame ionization detection. |
Technical Specifications of 303-43-5
| Test Item | Specification |
|---|---|
| Appearance | Colorless to pale yellow viscous liquid |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Melting Point | 35-40°C |
| Acid Value (mg KOH/g) | <=1.0 |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Refractive Index (n20/D) | 1.470-1.480 |
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 303-43-5
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Packaging of 303-43-5
Industrial 303-43-5 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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