China Factory Direct
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| CAS number | 103335-55-3 |
| Product name | 3-Oxo-4-aza-5-alpha-androstane-17-beta-carboxylic acid |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial 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) |
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 | Intermediate for synthesizing androgen receptor modulators | Prepared via oxidation of the steroid backbone, introduction of a nitrogen-containing heterocycle, and carboxylic acid functionalization |
| Test Item | Common Testing Methods | Method Overview |
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| Identification | Infrared Spectroscopy (IR) | Determine the infrared absorption spectrum of the sample and compare it with reference spectra to confirm functional groups and molecular structural characteristics. |
| Nuclear Magnetic Resonance Spectroscopy (NMR) | Use ¹H-NMR and ¹³C-NMR to analyze the chemical environments of hydrogen and carbon atoms for structural confirmation. | |
| Mass Spectrometry (MS or HRMS) | Detect the molecular ion peak to confirm molecular weight and fragment ions, aiding in structural identification. | |
| Purity/Assay | High-Performance Liquid Chromatography (HPLC) | Use a C18 reversed-phase column with UV detection (e.g., 210–254 nm); quantify main component using external standard or area normalization method. |
| Ultraviolet-Visible Spectrophotometry (UV-Vis) | Measure absorbance at a specific wavelength (e.g., ~240 nm) and use a calibration curve for quantification; suitable for rough quantitation of high-purity samples. | |
| Impurity Analysis | HPLC-DAD or UPLC-HRMS | High-resolution separation and detection of related substances, including process impurities and degradation products; HRMS assists in structural elucidation of impurities. |
| Moisture Content | Karl Fischer Titration | Accurately determine water content in the sample; available as volumetric or coulometric methods, suitable for trace moisture analysis. |
| Residual Solvents | Gas Chromatography (GC) | Detect residual organic solvents (e.g., methanol, ethanol, acetone, dichloromethane) from manufacturing processes according to ICH guidelines. |
| Polymorphic Form | X-Ray Powder Diffraction (XRPD) | Identify different crystalline forms and ensure batch-to-batch consistency of polymorphs, which affects solubility and stability. |
| Particle Size Distribution | Laser Diffraction Analysis (LDA) | Measure particle size distribution of solid particles, influencing dissolution rate and bioavailability. |
| Melting Point | Capillary Melting Point Method | Determine the temperature range at which a compound transitions from solid to liquid, used for preliminary identification and purity assessment. |
| Thermal Stability | Differential Scanning Calorimetry (DSC) | Analyze thermal behaviors such as melting, crystallization, and decomposition to evaluate thermal stability and polymorphism. |
| Thermogravimetric Analysis (TGA) | Measure mass changes of the sample during heating to determine solvent residues and decomposition temperatures. |
| Test Item | Specification |
|---|---|
| Appearance | White to light yellow powder or crystals |
| Purity | >=98.0% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Water Content (KF) | <=0.5% |
| Melting Point | 195.0 to 205.0 °C |
| Optical Rotation | +73.0 to +81.0 ° (c=1, in methanol) |
| Identification (NMR) | Consistent with structure |
| Heavy Metals | <=20 ppm |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
| Pictograms | ![]() |
| Signal Word | Warning |
| Safety Data Sheet | |
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.